Academic literature on the topic 'RC Thesis'
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Journal articles on the topic "RC Thesis"
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Chen, Ai Jiu, Jing Wang, and Zhan Fang Ge. "Experimental Study on the Fundamental Characteristics of Recycled Concrete." Advanced Materials Research 295-297 (July 2011): 958–61. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.958.
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At present, there are not any systematic researches on the fundamental performance of recycled concrete(RC). Thus it incites the inadequate confidence for the usage of RC. In this thesis, four different kinds of RC whose strength are C20、C25、C30、C35 respectively,are made using various mixing proportion. Then the influence rule of different recycled aggregate mixture quantities is drawn out, which consists the impacts on compressive strength, axial compressive strength, splitting strength, elastic modulus as well as the bending strength of RC. Meanwhile, the relation between the cubic compressive strength and the splitting strength, elastic modulus, axial compressive strength, bending strength is imitated, which provides study basis for the using of wasted concrete.
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Morales Valera, Alí Antonio. "La omisión teórica en la interpretación de los resultados de las investigaciones científicas." Revista Científica Retos de la Ciencia 3, no. 7 (2019): 1–10. http://dx.doi.org/10.53877/rc.3.7.20190701.01.
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The present essay finds to show the way in which theories are omitted in the interpretation of results of some scientific investigations, be for papers, degree works or thesis. Theoretical importance was observed independently of the research approach and cases of omission were reviewed of their own accord, as well as those that occur due to ignorance or little methodological and scientific knowledge. To avoid this inconvenience, it was mentioned as a suggestion to increase the space given to the interpretation of results in the methodology texts, as well as the greater attention to this aspect in the methodology subjects taught in higher education institutions. Keywords: theory, theoretical framework, research, methodology, interpretation of results.
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Wankhade, Vaishnavi Nitin. "A Seismic Vulnerability and Fragility of RC Conventional and Monolithic Building." International Journal for Research in Applied Science and Engineering Technology 10, no. 6 (2022): 4732–43. http://dx.doi.org/10.22214/ijraset.2022.45042.
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Abstract: This thesis aim is to study the modeling and analysis of monolithic building by STAAD PRO modeling of normal framed building and regular monolithic building have to be conducted and analysis and modeling of different plan irregular building, using equivalent static analysis, modal analysis, response spectrum analysis. The earthquake response of the building and damage assessment and are found out by comparing the analysis result. The earthquake parameters of building is comparing in X-direction. In this study the vulnerability assessment is analyzed by DCR method. In this study we compared the RC building and monolithic buildings analysis with two types of seismic zones
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Jogee, S., and J. D. P. Kenney. "5.7. The central gas consumption timescale in spirals." Symposium - International Astronomical Union 184 (1998): 223–24. http://dx.doi.org/10.1017/s0074180900084692.
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It is now widely accepted that a combination of torques and dissipation can drive molecular gas into the circumnuclear (inner kpc) region of spirals. However, the fate of the circumnuclear gas is poorly understood and depends on inflow mechanisms, outflow processes, and on star formation. It is unclear why spiral galaxies convert comparable amount of circumnuclear H2 into stars over a timescale (tsf) that varies by nearly two orders of magnitude between galaxies. The ratio M(H2)/L(RC) can be used to show the range in this timescale, where L(RC) is the 1.49 GHz radio continuum (RC) luminosity (Condon et al. 1990), and M(H2) the hydrogen mass traced by CO observations in the central 45″ (4.5 kpc for D=20 Mpc). A similar range is seen if the central 10 micron luminosity is used. Preliminary results from Jogee's thesis suggest that the circumnuclear gas consumption timescale by star formation (tsf) is correlated with the gas morphology (see Fig. 1) and kinematics. In particular, the value of tsf spans a large range in different kinematic regimes within a given galaxy, and together with inflow, this can lead some galaxies to follow evolutionary paths sketched in Fig. 1.
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Ri, Il-Ju, and Song-Hyon Han. "Determination of shear support capacity of transfer beam with varied section." International Journal of Architecture and Urbanism 5, no. 2 (2021): 232–44. http://dx.doi.org/10.32734/ijau.v5i2.6571.
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In the RC structure with transfer beam, if the beam is fixed with the column under the transfer layer, it will cause very big reaction of the support at the supporting point and can cause the serious breaking because the section of the transfer beam is very big. It’s not easy to make the section big for the whole length, so I studied about how to applicate the transfer beam with varied section to increase the capacity by changing the section of the beam around the supporting point.
 In this thesis, I suggested the formulars of the shear capacity of transfer beam with varied section by using the program ABAQUS.
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Das, K. Mohan, Baskar K, C. Selinravi Kumar, and B. Karthik Chary. "Comparative Study between Analytical and Theoretical Retrofitting of Rc Beam with Different Resins Bonded Cfrp Laminates." International Journal of Recent Technology and Engineering 10, no. 1 (2021): 30–38. http://dx.doi.org/10.35940/ijrte.a5690.0510121.
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This thesis details experimental work and finite part simulation of concrete beams retrofitted with carbon fiber strengthened compound (CFRP).The objectives of this study were to analyze the behavior of retrofitted beams to develop finite part model describing the beams, supportive the finite part model against the experimental results and eventually investigation the influence of chemical compound resins(GP, ISO, Epoxy) on the sweetening of strengthening of retrofitted beams. The experimental results square measure performed to analyze the behavior of beams designed in such approach that either flexural or shear are going to be expected. The beams rectangle measure loaded at exploitation 2 purpose bending till cracks square measure developed. The beams were then blank and retrofitted with CFRP. Finally the beams were loaded till failure. The ANSYS program is employed to develop finite part models for simulation of behavior of beams.
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R., Balamuralikrishnan, and Saravanan J. "Finite Element Modelling of RC T - Beams Reinforced Internally with GFRP Reinforcements." Civil Engineering Journal 5, no. 3 (2019): 563. http://dx.doi.org/10.28991/cej-2019-03091268.
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Fibre reinforced polymers (FRP) are being used extensively in the rehabilitation and retrofitting of existing structures as an external reinforcement because of their properties like high strength to weight and stiffness to weight ratios, corrosion resistance, light weight and high durability. They are especially used in the reinforced concrete structure like bridges, chimney, high rise building etc. At present FRP reinforcements are available in the form of reinforcing bars and are used in the structures in place of steel, mainly the structures are constructed near the coastal areas or in the aggressive environments. The main advantage of FRP rebar is its corrosion resistance, light weight, durability and easy handing. The FRP rebars are being used worldwide for many structures including bridge structures as well, but not well explored because of its availability. The main objective of this thesis work is to assess the static load behaviour of RC T-beams reinforced internally with GFRP reinforcements using finite element analysis software ANSYS. Totally twelve numbers of specimens were considered in this study with varying parameters such as type of reinforcements, reinforcements ratio and concrete grade. Modelling of the T- beams were done with ANSYS using solid 65 and link 8 element and the same were analyzed under static loading conditions. The results obtained from the ANSYS were compared with the theoretical and experimental analysis. Based on the comparison suitable conclusions and recommendations are made in this research work.
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Shi-ping, Yin, Yu Yulin, and Yunping Xi. "Flexural performance of TRC-strengthened RC beam under chloride environment." Anti-Corrosion Methods and Materials 65, no. 5 (2018): 444–50. http://dx.doi.org/10.1108/acmm-09-2017-1850.
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Purpose Textile reinforced concrete (TRC) has excellent bearing capacity and anti-crack and corrosion resistance capacity, which are suitable for strengthening concrete structure under harsh environments. Design/methodology/approach In this thesis, flexural properties of RC beams strengthened with TRC under chloride wet–dry cycles were studied and the effects of the concentration of the salt solution, number of wet–dry cycles, bending stress level and TRC form were considered. Four-point bend loading mode was adopted for the step-loading procedure. Findings As the number of wet–dry cycles was relatively few, the trend of the yield and ultimate load with the increasing concentration of salt solution and wet–dry cycles were not obvious. However, the beams under high sustained bending stress level (0.5) had a decrease in the bearing capacity and an increase in mid-span deflection because of the larger degree of the corrosion of steel bars and the weaker bond capacity between the steel bar and concrete. Besides, there was little difference between the precast TRC plate and the casting TRC on beams in terms of the capacity of anti-crack, bearing and deflection. Research limitations/implications In this paper, preliminary work has been carried out, but some of the factors were not comprehensive considered, which are inevitable. As the time of dry–wet cycles was short and TRC layer had good anti-crack and anti-permeability performance, smaller chloride ions’ penetration resulted in the corrosion ratio of steel bars to be lower. Practical implications It should be noted that under high corrosion rates of the reinforcement, the whole TRC strengthening layer might be spalled off if only the strengthening form at the beam bottom is used, and thus the U-type strengthening form could be considered, which means that the beam is strengthened at both the bottom and side surfaces. Originality/value This research only considers the flexural performance of the beams strengthened with TRC in conventional environment, and there is little research on the TRC-strengthened beam under corrosion environment. On the basis of previous research, this paper carried out the experimental study on beams strengthened with TRC under chloride wet–dry cycle environment, and the effects of the concentration of the salt solution, number of wet–dry cycles, bending stress level and TRC form were considered.
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James, Jerison Scariah, and Margrette Mary James. "Effect of Fibres on Beam Column Joint Failure." Applied Mechanics and Materials 857 (November 2016): 59–64. http://dx.doi.org/10.4028/www.scientific.net/amm.857.59.
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Concrete is one of the most resourceful and environmental friendly building materials. It can be cast to fit any structural shape from a cylindrical water storage tank to a rectangular beam, slabs and column in a high-rise building. In RC buildings, portions of columns that are common to beams at their intersections are called beam column joints. Beam-column joints have a crucial role in the structural integrity of the buildings. Review of literature indicates that numerous studies were conducted in the past to study the behaviour of beam-column joints with normal concrete. However, those recommendations are not intended for the fibre reinforced concrete. Some indicates that this material is an alternative to the confining reinforcement in the joint region. So the comparative study of the performance of different fibres in beam column joint has a greater importance and relevance in the field of RCC framed structures. This thesis aims to study the behaviour of beam column joint by evaluating the performance of fibre reinforced concrete. The incorporation of fibres in beam column joint is analysed in this study. The use of different types of fibres such as steel and polypropylene are evaluated.
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Błaszczynski, Tomasz Z. "THE INFLUENCE OF CRUDE OIL PRODUCTS ON RC STRUCTURE DESTRUCTION / NEAPDIRBTOS NAFTOS PRODUKTŲ ĮTAKA GELŽBETONIO STRUKTŪROS SUARDYMUI." Journal of Civil Engineering and Management 17, no. 1 (2011): 146–56. http://dx.doi.org/10.3846/13923730.2011.561522.
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It is known that RC industrial structures are liable to the effects of crude oil products, which may have a disadvantageous influence on their exploitation and safety. Within this research, the influence of crude oil products on the physico-mechanical properties of mature concrete, as well as other possible mechanisms of RC progressive failure have been analysed. Crude oil products with a very low neutralisation number were found to be physico-chemical active agents affecting concrete. Experimental analysis undertaken in order to assess the compressive strength of concrete and its bond to reinforcements is described. Long term investigations were conducted in order to determine the effects of a group of crude oil products—mineral oils—on the properties of concrete and reinforced concrete samples. Detailed results of this research are included in the paper. Comparing the influence of different mineral oils on the compressive strength of concrete, leads to the conclusion that there are large differences in their effects. The paper also attempts to answer the question of how the characteristics of RC structure bonds change over time of exposure to mineral oils. The problem of the influence of organic agents on concrete and its bond under conditions of natural humidity is mainly linked to its structure. In the case of oil products, there are four possible mechanisms i.e., biological, chemical, physical and physico-chemical, affecting concrete, its bond and, sometimes, reinforcements. Each of these mechanisms is presented. Necessary laboratory tests were performed in order to prove the thesis that the content of active surface polar molecules in active agents is the reason behind concrete damage brought about by crude oil products. The conducted experiments demonstrated that the effects of artificial environments (on concrete) prepared by the author, are the same as those of widely used industrial mineral oils. Santrauka Yra žinoma, kad gelžbetoninės pramoninės konstrukcijos yra jautrios neapdirbtos naftos produktams, o tai gali turėti neigiamąįtaką jų eksploatacijai ir saugumui. Šiame tyrime analizuojama neapdirbtos naftos produktų įtaka brandaus betono fizinėms ir mechaninėms savybėms, aptariami galimi poveikiai, skatinantys progresyvų gelžbetonio irimą. Buvo nustatyta, kad neapdirbtos naftos produktai, turintys labai žemą neutralizavimo laipsnį, yra fiziniai ir cheminiai reagentai, veikiantys betoną. Straipsnyje aptariamas eksperimentas, kuris buvo atliktas siekiant įvertinti betono stiprį gniuždant ir jo sukibtį su armatūra. Buvo atlikti ilgai trunkantys bandymai, siekiant nustatyti neapdirbtos naftos produktų grupės—mineralinių naftos produktų—poveikį betono savybėms ir armatūros bandiniams. Šiame straipsnyje pateikiami išsamūs tyrimų rezultatai. Skirtingų mineralinių naftos produktų poveikio betono stipriui palyginimas leidžia daryti išvadą, kad poveikiai gali būti labai skirtingi. Straipsnyje stengiamasi atsakyti į klausimą—kaip keičiasi gelžbetonio sukibtis laikui bėgant, jo neapsaugojus nuo mineralinių naftos produktų poveikio. Natūralios drėgmėssąlygomis organinių reagentų įtaka betonui ir jo sukibčiai daugiausia priklauso nuo jo struktūros. Veikiant naftos produktams galimi keturi pagrindiniai poveikiai—biologinis, cheminis, fizinis, fizinis ir cheminis, kurie veikia betoną, jo sukibimą ir kartais armatūrą. Kiekvienas šių poveikių yra aptariamas straipsnyje. Siekiant įrodyti teiginį, kad aktyvios paviršiaus polinės molekulės, esančios aktyviuose reagentuose, yra priežastis, dėl kurios betonas veikiamas neapdirbtos naftos produktų, buvo atlikti būtini laboratoriniai bandymai. Atlikti eksperimentai parodė, kad dirbtinės aplinkos poveikiai (betonui), sumodeliuoti autoriaus, yra tokie patys kaip ir tie, kurie atsiranda dėl plačiai naudojamų pramoninių naftos produktų.
Dissertations / Theses on the topic "RC Thesis"
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Weiner, Kate. "Patient and professional constructions of familial hypercholesterolaemia and heart disease : testing the limits of the geneticisation thesis." Thesis, University of Nottingham, 2006. http://eprints.nottingham.ac.uk/10190/.
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This thesis provides an empirical investigation of the geneticisation thesis. Geneticisation is one of the most prominent critiques of the social and cultural implications of developments in genetics. It incorporates a set of claims and expectations about the way genetic knowledge and technologies are transforming or will transform ideas about health and illness, and health care practices. This research aims to explore the empirical basis of these claims, by looking at the place of genetic discourses and practices in one specific area. The thesis focuses on familial hypercholesterolaemia (FH), a treatable hereditary cholesterol condition associated with high rates of coronary heart disease (CHD). It asks how much and in what ways patients with FH and professionals involved with the condition construct FH and CHD as genetic conditions. The thesis draws on three main areas of data - biomedical literature concerning CHD and FH; ethnographic work concerning the activities of HEART UK, the main UK health charity involved with inherited lipid disorders and cholesterol; and interviews with patients with FH and with staff and members of HEART UK. The analysis suggests that FH is not understood or managed within a strong genetic frame, and that neither professionals involved in HEART UK, nor patients with FH, provided or contributed to radically new or geneticised accounts of CHD. In short, the research suggests that geneticisation overstates the transformatory potential of genetics, and that factors such as the availability of effective therapeutics, the sites where care takes place, the disciplines involved, and existing lay and professional models of disease are important for the construction of a particular field. Furthermore, in arguing that FH is not associated with a strong specific disease identity or community, the analysis questions the notion of biosociality, suggesting that is may be less relevant to some biological states or conditions than to others.
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Ruyembe, Charles Enock Mulimba. "Practical linkages between cultural policy and education policy in promoting a creative workforce for youth in Tanzania." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/82090/1/Charles%20Enock%20Mulimba_Ruyembe_Thesis.pdf.
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The broad aim of of this thesis is to contribute to understanding how the relationships between culture, employment and education can help Tanzania's young people secure jobs, and survive in the creative workforce so as to better their future. Based on a range of interviews and other data in Tanzania, the study considers how to integrate cultural expressions into arts education (education in art and education through art) as a tool for nurturing young people's creative talents for their future sustainable employment in Tanzania.
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Wood, Brian Henry. "Experimental validation of an integrated FRP and visco-elastic hardening, damping, and wave-modulating system for blast resistance enhancement of RC columns." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2008. http://scholarsmine.mst.edu/thesis/pdf/Wood_09007dcc80538e4c.pdf.
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Thesis (M.S.)--Missouri University of Science and Technology, 2008.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed August 28, 2008) Includes bibliographical references (p. 112-115).
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Van, der Vyver Petrus Jacobus. "Antimicrobial properties and smear layer management of nine different root canal irrigation solutions." Diss., Pretoria : [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-082222008-163721/.
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Mňuk, Václav. "Bytový dům, Náchod - Tepenská." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226673.
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The purpose of the master thesis is the Residential house, Nachod - Tepenska. The building is situated near by the city center of Nachod. It contains 6 floors. In the first floor there are two comercial areas, technical room and parking lot. The roof of parking lot serves as a terace for the second floor. In other floors are situated flats. Whole building is covered by flat roof. The ETICS is applied. The insulation from mineral wool is used. The master thesis includes the blue prints of the building.
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Dávila-Sänhdars, Migual Angel. "Ductility of RC beams with FRP reinforcing bars /." Title page, synopsis and contents only, 1998. http://web4.library.adelaide.edu.au/theses/09ENS/09enss127.pdf.
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Kirch, Nienkotter Rocha Bruna. "Intrinsic variations in geometric properties of nonlinear equivalent strut models for infill-RC frames." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2019. https://ro.ecu.edu.au/theses/2187.
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Reinforced concrete frames infilled with unreinforced masonry are commonly used in structures worldwide. The interaction between the frame and the infill panel is usually ignored in engineering practice, and the masonry infill is not considered as a structural element. However, observations made after the occurrence of strong earthquakes have shown that the bare frame and infill-frame behave differently when subjected to in-plane lateral loads. Extensive research has been conducted on the behaviour of infill-frames when laterally loaded. This research focuses on the analysis of infill-frames using the equivalent strut modelling method, whereby an infill-frame is simplified, and the infill panel is replaced by one or more compressive strut elements. A large number of strut models have been proposed in the literature, but recent studies have demonstrated that it is not possible to apply one strut model to all infill-frame structures. It has been found that changing the properties of an infill-frame can also change the geometric properties of struts, namely width, location and number of struts in an equivalent strut model. For this reason, recent studies have proposed a case-specific strut modelling approach. In the current study, a macro script available in the literature that can be used to generate a detailed finite element (FE) model has been applied to construct and analyse a number of infill-frames with different material and geometric properties. Sensitivity analyses on some of these infill-frames have also been conducted by varying the material properties of the infill, and the amount and distribution of vertical loads on the frame. The results of detailed FE analyses, more specifically contours of the compressive principal stresses, have been used to define the geometric properties of the struts of case-specific strut models for each of the infill-frames. Equivalent strut models were then analysed and compared. Further, the proposed strut models were applied to other infill-frames selected for this study; two strut models from the literature were also applied to these infill-frames. It was concluded that the geometric properties of, and the vertical load on an infill-frame can be related to the geometric properties of its equivalent strut model. In contrast, a variation of up to 25% in the masonry material properties did not have a significant effect on the strut properties. It was shown that casespecific strut modelling is a versatile and generic technique that can adequately replicate the highly nonlinear behaviour of infill-frames regardless of their geometric or material properties. By expanding the current research, it is hoped that a rigorous classification of infill-frames and their relevant equivalent strut models can be developed to assist structural engineers in their everyday design tasks.
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Badenhorst, Adriaan Jakobus. "Debonding of external CFRP plates from RC structures caused by cyclic loading effects." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20308.
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Thesis (MScEng)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: This study set out to determine the debonding of externally applied Carbon Fibre Reinforced
Polymer (CFRP) plates from RC structures under cyclic loading. Triplet shear tests and finite
element (FE) analyses were done on the epoxy to determine the bond stress between the
CFRP plate and a reinforced concrete specimen. From these tests and analyses the
average shear strength of the bond between the epoxy and concrete substrate was
determined and the shear strength of the epoxy specified by the supplier could be confirmed.
A case study of a statically loaded beam was performed to verify the bond strength.
Finally a reinforced concrete (RC) T-section was designed and pre-cracked to simulate a
damaged beam in practice. These sections were then externally reinforced by bonding
CFRP plates onto the face of the web. The sections were subjected to static and cyclic
loading at different force amplitudes. Along with the experimental tests, FE models were
developed and analysed which had the same geometrical and material properties as the
experimental specimens. Due to time constraint a FE mesh objectivity study was not done,
but the chosen element size is believed to be sufficiently small to replicate the experimental
tests objectively.
The FE analyses and the experimental tests yielded results that were close to each other on
both the global scale and in terms of localised behaviour, thus it was decided that the
computational approach could be used for the final design of a model of the debonding of
CFRP plates bonded onto RC beams under cyclic loading because the data can be
analysed more easily and a large variation of tests can be done.
For the T-section 3 tests were conducted; a pull-off (static) test where the bonded CFRP
plate was pulled from a specimen to get the ultimate failure envelope of the test specimens.
The static test was followed by cyclic tests with force amplitude of 85% and 65% of the
ultimate pull-off strength. Different measurements were taken to get the global and local
displacement behaviour of the section. The global displacement was measured by means of
a linear variable displacement transducer (LVDT, displacement meter) clamped onto the
CFRP plate that pushed on the top of the concrete and the local displacement was
measured with the help of the Aramis system. The displacement was then compared to the
same displacements of nodes and elements in the FE models. The result was a
confirmation that the results from the FE models were sufficient to design a model for cyclic
debonding of CFRP plates from RC structures. From the FE models the relative displacement between the CFRP plate and concrete was
obtained in the vicinity of a crack. This relative displacement was then normalised by the
respective stress range of the different tests, from which the normalised relative
displacement was plotted against the number of cycles to get an equation limiting the
number of cycles for a specific stress range.
From the results, it appears that for cyclic load levels up to 65% of the peak static resistance,
a threshold number of load cycles are required for delamination initiation. Subsequently, a
near constant delamination rate is reached. The delamination rate is significantly lower for
lower cyclic load levels. Finally, an unstable delamination stage is reached at a level of
about 65 μm for all the analyses, after which CFRP pull-off is imminent.
Service life design of CFRP reinforcement of RC beams should take into consideration the
delamination initiation threshold, the subsequent delamination rate and finally the initiation of
unstable delamination.<br>AFRIKAANSE OPSOMMING: Die projek is uitgevoer om die delaminasie van ekstern aangewende Koolstof Vesel
Versterkte Polimeer (KVVP) stroke op gewapende beton strukture te bepaal onder sikliese
belasting. Triplet skuif toetse is gedoen op die gebruikte epoksie om die verband-sterkte te
bepaaltussen die KVVP stroke en die beton proefstuk. Die skuif toetse is ook met behulp
van die eindige element (EE) metode geanaliseer. Die resultaat van die toetse en analises
het gewys dat die verband sterkte tussen die KVVP stroke en beton gelyk is aan die skuif
sterkte van die epoksie wat verskaf is. `n Gevalle studie van `n monotonies belaste balk is
gedoen om die verband-sterkte te verifieër.
`n Gewapende beton T-snit is ontwerp en voor-af gekraak om `n beskadigde balk in die
praktyk voor te stel. Die beskadigde proefstukke is vervolgens ekstern versterk met KVVP
stroke wat aan die web van die T-snit vas geplak is. Die versterkte T-snitte is getoets onder
statiese en sikliese belasting. Die sikliese toetse is ook onder verskillende
spanningsamplitudes getoets. Om die eksperimentele toetse te verifieër is EE modelle
gebou en geanaliseer wat dieselfde geometriese en materiaal eienskappe as die
eksperimentele proefstukke gehad het, maar as gevolg van `n tydsbeperking is `n
sensitiwiteit studie oor die element grootte nie gedoen nie. Die element grootte is klein
genoeg gekies en word beskou as voldoende om die gedrag objektief te simuleer.
Die EE analises en eksperimentele resultate was na genoeg aan mekaar op beide globale
en lokale vlak. Dus is `n analitiese benadering tot die toetse vervolgens gebruik vir die
ontwerp van `n model vir delaminasie van KVVP stroke van gewapende beton strukture
onder sikliese belasting. Die EE metode stel die analis in staat om `n verskeidenheid van
toetse relatief vinnig uit te voer en om die data van die toetse vinniger te interpreteer as deur
fisiese eksperimentele toetse.
Drie eksperimente is uitgevoer op die T-snitte, `n aftrek-toets (staties) waar die KVVP strook
van `n proefstuk afgetrek is om die falingsomhullende diagram te kry en dan ook twee
sikliese toetse teen 85% en 65% van die krag amplitude van die falingskrag.
Verplasingsmeters is gebruik om die globale verplasing te kry, deur dit vas te klamp op die
KVVP strook en dan die verplasing te meet relatief tot die bokant van die beton. Die lokale
veplasing is met behulp van die Aramis sisteem verkry. Die eksperimentele verplasings is
dan vergelyk met verplasings van die ooreenstemmende nodes en elemente in die EE
modelle. Deur die vergelyking van die resultate is dit bevestig dat die eindige element modelle voldoende is om die model vir sikliese delaminasie van KVVP stroke van
gewapende beton strukture te gebruik vir die ontwerp.
Uit die EE modelle is die relatiewe verplasing tussen die KVVP strook en die beton gekry in
die omgewing van `n kraak. Die relatiewe verplasing is genormaliseer deur elkeen se
spanningsamplitude. Die genormaliseerde relatiewe verplasing is dan teenoor die aantal
siklusse geteken waarvan `n vergelyking vir die maksimum verplasing afgelei is om die
aantal siklusse vir `n gegewe spanning amplitude te beperk.
Uit die resultate blyk dit dat vir sikliese laste tot en met 65% van die piek statiese weerstand
`n aantal siklusse moontlik is voordat delaminasie begin waarna `n konstante delaminasie
tempo bereik word. Die delaminasie tempo is stadiger vir sikliese laste teen `n laer
belastings amplitude. Laastens word `n onstabiele delaminasie fase bereik by `n vlak van
ongeveer 65 μm, na die oorgang delamineer die KVVP strook binne enkele siklusse.
Die beginpunt van delaminasie, die delaminasie tempo en laastens die begin van onstabiele
delaminasie moet in gedagte gehou word by die ontwerp diens leeftyd van KVVP versterkte
gewapende beton balke.
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Abdullah, Ahmad Mahmoud. "Analysis of repaired/strengthened R.C. structures using composite materials : punching shear." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/analysis-of-repairedstrengthened-rc-structures-using-composite-materials-punching-shear(6fd3f27c-ef35-4996-9707-09187ad10e9f).html.
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Fibre reinforced plastics (FRP) have been used widely in civil engineering in order to improve the structural response (deformation and stress). Most of the current codes for the strengthening of RC structures do not provide enough provision for the design of the column-slab connections strengthened with externally bonded reinforcement (EBR) due to the lack of research covering this area. This study is to investigate, both experimentally and analytically, the effectiveness of bonding pre-stressed carbon fibre plates to the tension surface of concrete column-slab connections in both the serviceability and ultimate limit state. The experimental programme comprises five full-scale specimens that are designed and fabricated to simulate an interior column-slab connection. The prestressing technique, application procedure and prestressing device are described in detail in this study. Different prestressing forces are applied to the FRP plates bonded to the concrete substrate. The structural response of the strengthened specimens are compared with a reference specimen in terms of punching shear strength, deflection profile, strain, crack opening displacement and failure modes. Furthermore, a finite element model using ABAQUS is built to obtain a further insight into the punching behaviour of the test slabs. Both experimental and numerical results are compared, and a parametric study on the effect of the FRP-concrete interface on the structural integrity is conducted. Results are also compared with Eurocode 2 and ACI for the prediction of the punching strength. It was found that bonding of prestressed FRP plates to the tensile face of the concrete slabs improved the serviceability, but was not able to enhance the ultimate behaviour as much as the non-prestressed FRP plates. The development of the critical diagonal crack (CDC) was the main reason for diminishing the ultimate strength of the strengthened slabs.
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Trojáková, Michaela. "Penzion Pamferova Huť." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372261.
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This diploma thesis describes the design and processing of project documentation pension. The proposed facility is located in the village of Železná Ruda- Pamferova Hut. The site is widely used by tourists in winter and summer. This is partly basement building, which has 2 storeys and an attic. The roof is designed as a gabled dormer with a flat roof. The building is based on the footings of plain concrete and under the reinforced concrete pillars are designed shoe. Supporting, peripheral and partition walls are designed from sand-lime bricks SENDWIX. An exception is peripheral walls of the basement, which is in contact with soil, which is designed as a lost formwork. In the dining area, which has an open reinforced concrete columns. Ceiling structure will consist of prestressed ceiling panels SPIROLL. Perimeter walls are insulated using external thermal insulation composite system using insulation from stone wool. The building is functionally divided into three main parts with a common main entrance. The first part is a restaurant with a kitchen, storage and kitchen facilities. This section is designed restaurants with a total capacity of 26 persons, the capacity will be in the summer to expand the possible capacity of the terrace, which belongs to the dining room. It is also proposed sanitary facilities for visitors to the restaurant, kitchen with storage and facilities for staff. The second part is the wellness center, which consists of a gym and rooms with infrared sauna and whirlpool. This section is designed sanitary facilities for visitors separated for men and women. The last part of the pension, which used to accommodate 30 people and the background of the pension. Backgrounds pension means any technical equipment room, storage room for bikes and skis, and not least the individual room house, which also includes a room for personal hygiene. This thesis was created with an emphasis on a correct layout and architectural design, static requirements an
Books on the topic "RC Thesis"
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Repole, Donato. Research of Parallel Computing Neuro-fuzzy Networks for Unmanned Vehicles. RTU Press, 2021. http://dx.doi.org/10.7250/9789934226922.
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The Doctoral Thesis illustrates the author’s research in the field of VHDL based ‘neuro-fuzzy controllers’. The Thesis examines a novel software tool for the high-level ‘neuro-fuzzy controller’ description capable of executing controller simulations, optimisation tasks, performing learning / training tasks, and exporting the controller in VHDL code. The author introduces a design strategy that is looking for developing solutions for complex controller architecture of mobile robotic vehicles (of any nature) or even for multiple industrial application. This work enables further investigative research into autonomous robotics, particularly into the physical implementation of an autonomous aerial unmanned vehicle from an inexpensive RC plane.
Book chapters on the topic "RC Thesis"
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Fonseca, E. S., K. M. A. Silva, S. H. S. Santana, L. M. Policarpio, and E. Bayraktar. "Evaluation of Reinforced Concrete (RC) with Different Scrap Coarse Aggregates." In Recycling of Plastics, Metals, and Their Composites. CRC Press, 2021. http://dx.doi.org/10.1201/9781003148760-24.
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Zhang, Chunwei, and Gholamreza Gholipour. "Simply-supported RC beams subjected to combined impact-blast loads." In Concrete Structures Subjected to Impact and Blast Loadings and Their Combinations. CRC Press, 2022. http://dx.doi.org/10.1201/9781003262343-6.
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Zhang, Chunwei, and Gholamreza Gholipour. "RC columns subjected to the combination of impact and blast loads." In Concrete Structures Subjected to Impact and Blast Loadings and Their Combinations. CRC Press, 2022. http://dx.doi.org/10.1201/9781003262343-8.
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Zhang, Chunwei, and Gholamreza Gholipour. "Nonlinear dynamic analysis of RC columns subjected to lateral impact loads." In Concrete Structures Subjected to Impact and Blast Loadings and Their Combinations. CRC Press, 2022. http://dx.doi.org/10.1201/9781003262343-4.
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Vielma, Juan Carlos, Angely Barrios, and Anny Alfaro. "Numerical Study of the Seismic Response of a Mid-Rise RC Building Damaged by 2009 Tucacas Earthquake." In Earthquakes and Their Impact on Society. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-21753-6_12.
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Ilki, A., O. F. Halici, M. Comert, and C. Demir. "The Modified Post-earthquake Damage Assessment Methodology for TCIP (TCIP-DAM-2020)." In Springer Tracts in Civil Engineering. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-68813-4_5.
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AbstractPost-Earthquake damage assessment has always been one of the major challenges that both engineers and authorities face after disastrous earthquakes all around the world. Considering the number of buildings in need of inspection and the insufficient number of qualified inspectors, the availability of a thorough, quantitative and rapidly applicable damage assessment methodology is vitally important after such events. At the beginning of the new millennia, an assessment system satisfying these needs was developed for the Turkish Catastrophe Insurance Pool (TCIP, known as DASK in Turkey) to evaluate the damages in reinforced concrete (RC) and masonry structures. Since its enforcement, this assessment method has been successfully used after several earthquakes that took place in Turkey, such as 2011 Van Earthquake, 2011 Kutahya Earthquake, 2019 Istanbul Earthquake and 2020 Elazig Earthquake to decide the future of damaged structures to be either ‘repaired’ or ‘demolished’. Throughout the years, the number of research activities focusing on the reparability of earthquake-damaged structures has increased, which is a purposeful parameter in the determination of buildings’ future after earthquakes. Accordingly, TCIP initiated a research project with a sole aim to regulate and reevaluate the damage assessment algorithm based on the results of state-of-the-art scientific research. This chapter presents the new version of the damage assessment methodology for reinforced concrete structures which was developed for TCIP (TCIP-DAM-2020). In addition, an application of the developed damage assessment algorithm on an earthquake-damaged reinforced concrete building which was struck by Kocaeli (1999) earthquake is presented.
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Sharma, Gaurav, Shruti Sharma, and Sandeep Kumar Sharma. "Crack Classification in Steel-RC and GFRP-RC Beams with Varying Reinforcement Ratio Using AE Parameters." In Acoustic Emission - New Perspectives and Applications. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.101305.
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The main aim of this chapter is to monitor the cracking and damage assessment in steel-reinforced concrete (steel-RC) and glass fibre polymer-reinforced concrete (GFRP-RC) beams along with varying percentages of tension reinforcement ratio. Beam specimens measuring (150 × 230 × 2100) mm were tested using a four-point bending flexural test using a universal testing machine together with an AE monitoring system. Acoustic emission (AE) has been applied for the early monitoring of steel-RC and GFRP-RC structures using AE parameters such as cumulative AE hits, average frequency, rise angle, amplitude, duration and AE XY plots to evaluate the micro and macro cracking in the steel-RC and GFRP-RC beams specimens. The most popular applications of AE signal in structural health monitoring are specified on crack monitoring, quantifying the degree of damage, and crack classification. In this research, the results indicated that the average frequency and rise angle parameter of AE signal are applied to classify the types of cracks (flexural or shear cracks) that occur in steel-RC and GFRP-RC beams along with varying percentages of tension reinforcement ratio subjected to flexural loading. As a result of these findings, the AE approach may be used to examine crack monitoring and crack classification in steel and GFRP-RC beams with different percentages of tension reinforcement ratios.
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Copp, David. "The Rule Worship and Idealization Objections Revisited and Resisted." In Oxford Studies in Normative Ethics Volume 10. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198867944.003.0007.
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There are two familiar and important challenges to the rule consequentialist picture, Smart’s “rule worship objection” and the “idealization objection.” This chapter defends rule consequentialism (RC) against these challenges. It argues that to satisfactorily meet the rule worship objection, we need to reconceptualize RC. We need to think of it as not fundamentally a rival to act consequentialism or deontology or virtue theory. Instead, it can potentially adjudicate among these views. It is best viewed as a “second-order” theory that rests on a view about the nature and point of morality. The rule worship objection can be answered if we interpret RC in this way. The idealization objection can seem more difficult because it appears to arise from the basic RC approach to evaluating rules. This chapter suggests, however, that the idealization objection boils down to a familiar problem about conflicts of pro tanto duties. RC can handle it in the way that it handles such conflict.
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"Optimum Design of Carbon Fiber-Reinforced Polymer for Increasing Shear Capacity of Beams." In Metaheuristic Approaches for Optimum Design of Reinforced Concrete Structures. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2664-4.ch008.
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For reinforced concrete (RC) structures, retrofit of structures are needed to be done for several situations. These situations include the renovation of structure by adding new components (floors or extension) and elimination of safety risks (resulting from unforeseen effects - forces and durability). Most retrofit methods for RC structures need destruction of existing members and hard work on increasing of existing section dimension and reinforcements. Whereas, using carbon fiber reinforced polymer (CFRP) strips is an easy option to increase the flexural moment or shear capacity of RC members without destruction. In that case, the use of the structure is provided during the application. In this chapter, the optimum design of CFRP strips is presented for increasing the insufficient shear capacity of RC beams. The design constraints are provided according to ACI-318: Building code requirements for structural concrete and ACI-440: Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structure.
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Delgado, Jorge M., Antonio Abel R. Henriques, and Raimundo M. Delgado. "Structural Non-Linear Models and Simulation Techniques." In Advances in Systems Analysis, Software Engineering, and High Performance Computing. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-8823-0.ch018.
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Advances in computer technology allow nowadays the use of powerful computational models to describe the non-linear structural behavior of reinforced concrete (RC) structures. However their utilization for structural analysis and design is not so easy to be combined with the partial safety factors criteria presented in civil engineering international codes. Trying to minimize this type of difficulties, it is proposed a method for safety verification of RC structures based on a probabilistic approach. This method consists in the application of non-linear structural numerical models and simulation methods. In order to reduce computational time consuming the Latin Hypercube sampling method was adopted, providing a constrained sampling scheme instead of general random sampling like Monte Carlo method. The proposed methodology permits to calculate the probability of failure of RC structures, to evaluate the accuracy of any design criteria and, in particular, the accuracy of simplified structural design rules, like those proposed in civil engineering codes.
Conference papers on the topic "RC Thesis"
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Ni, Shuna, Ruben Van Coile, Danny Hopkin, Negar Elhami Khorasani, and Thomas Gernay. "Sensitivity Studies of the Resilience of RC Columns to Various Fire Scenarios." In IABSE Congress, New York, New York 2019: The Evolving Metropolis. International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.0732.
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<p>Reinforced concrete (RC) structures generally fare well under fire, but exhibit damage and residual deformations which require repairs. Besides the repair cost, the building downtime can also be expensive. However, current fire design approaches focus solely on life safety, and do not consider resilience. To improve post-fire performance of buildings, recover functionality, and facilitate fast reuse, an important step is to develop a predictive capability for the effect of a fire event on residual deformations and load-bearing capacity in structures. This research investigates the residual deformations in RC buildings after a fire, with a focus on the columns as one of the key structural members. The case study is a five-story RC frame building with a fire developing on the first story. Thermo-structural finite element analyses were used to analyze the columns performance under various fires. The sensitivity of the RC columns’ responses to main parameters related to fire characteristics, material properties and mechanical loading was analyzed. Based on the sensitivity studies, the most critical parameters were determined for the vulnerability of the RC columns to the different fire scenarios. These critical parameters will be used for the subsequent probabilistic damage evaluation of the RC columns and their design alternatives. The results will contribute to improved understanding of the effects of fire on the resilience of RC buildings and infrastructure, as well as the identification of designs which provide enhanced post-fire performance.</p>
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Di, Long, and YangQuan Chen. "Autonomous Flying Under 500 USD Based on RC Aircraft." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47851.
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Radio control (RC) aircrafts have been favorite toys of aviation hobbyists for years. Because of their simple configurations and low expense, they can also be used for reconnaissance and surveillance with information-gathering devices under commands of a skillful human pilot. However, control with human in the loop not only degrades the reliability of the flight performance, but also bring restrictions in endurance and accuracy. In order to resolve these issues and extend the usage of RC aircrafts, getting them capable of autonomous navigation is a preferred solution. This paper reports our approach by designing and integrating an autonomous system on a regular RC aircraft to achieve full autonomy while keeping the additional costs almost equivalent to the cheap RC platform. The current platform will be briefly presented, the system architecture and major components will be introduced, and detailed autonomous demonstration flight results will be provided at the end.
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Chowdhury, Nargis A., Ahmed A.-Jumaily, Maximiano V. Ramos, Afsar Uddin, and John Robertson. "Actuation of Carbon Nanofiber Reinforced Electro-Active Paper Actuators." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-87159.
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Actuation of two types of electro-active paper actuators composed of functionalized carbon nanofiber, polypyrrole, and regenerated cellulose (FCNF/PPy/RC) and functionalized carbon nanofiber, ionic liquid, and regenerated cellulose (FCNF/IL/RC) is evaluated for different preparation processes. FCNF/PPy/RC nanocomposite films are prepared by dispersing functionalized carbon nanofiber and polypyrrole into cellulose solution in DMAC/LiCl, and then casting the solution onto glass. FCNF/IL/RC nanocomposite films are fabricated simply by adopting a bimorph configuration with a regenerated cellulose-supported internal ionic liquid electrolyte layer sandwiched by electrode layers with a view to getting quick and long-lived operation in air at low applied voltage. The electrode layers include functionalized carbon nanofiber, ionic liquid and regenerated cellulose. The results indicate that the bending displacement decreases with increasing frequency and increases with increasing voltage for both types of actuators. These low voltage driven solid state actuators show maximum stress and strain of 12.73 MPa and 3.0%, respectively, which are comparable with other low-voltage driven solid-state electro-active polymer actuators. The advantages of these types of actuators are their ability to perform well in air and easy process of fabrication.
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Park, Minseok, Chul-Young Kim, Sunah Choi, and Yunbyeong Chae. "Rate-Dependency Study of Reinforced Concrete Piers with Cyclic Loading Tests, Hybrid Simulations, and Shake Table Testing." In IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management. International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/guimaraes.2019.1330.
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<p>Dynamic response of structures can be evaluated experimentally by conducting various tests such as cyclic loading test, hybrid simulation, and shake table testing. It has been known that concrete materials are rate-dependent. However, the rate-dependency of reinforced concrete (RC) structures has not been sufficiently studied, especially under earthquake loads with their actual loading rates. For this reason, it has been believed that the response of RC structures is not so sensitive to loading rate expected from earthquake loads. In this study, the rate-dependent behaviors of RC piers are investigated and compared by conducting cyclic loading test, slow hybrid test(SHT), real-time hybrid test(RTHT), and shake table testing(STT). A small-scale rectangular sectioned RC piers are manufactured and subjected to various loads with different loading rates, where it shows that the strength, energy dissipation capacity, and structural response of the RC piers can be substantially affected by loading rate.</p>
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Liu, Yanhui, Al-Bukhaiti Khalil, Shichun Zhao, et al. "Experimental and numerical study on unequal lateral impact behavior of Circular RC and CFRPRC components." In IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures. International Association for Bridge and Structural Engineering (IABSE), 2022. http://dx.doi.org/10.2749/prague.2022.1890.
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<p>The dynamic response of Reinforced Concrete (RC) and Carbon Fiber Reinforced Polymers with Reinforced Concrete (CFRPRC) is studied. These tests were performed on RC members covered in one to six layers of CFRP. Once the energy is high, the two components' deflection-time histories are produced. It increases component impact resistance in studies. Component deflection is reduced by carbon fiber reinforced polymer (CFRP). RC members shear while CFRPRC components bend due to significant concrete damage. It fractures more easily when wrapped with CFRP. The model's predictions match the tests adequately. A numerical simulation study looked at the impact force of members under unequal-span lateral collisions. Regardless of impact velocity, lateral impact on an unequal span induces severe shear failure of RC members. However, CFRPRC component bending deformation reflects impact velocity. Increasing the reinforcement ratio of RC members has little effect on the impact resistance of CFRPRC components. To avoid steel fracture, greater reinforcing ratios are used.</p>
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Roy, Alan, Thurairajah Sriskandarajah, Suwarno Gunawan, et al. "Methodology for Installation of Under-Straight Pipe for Lateral Buckling Mitigation." In ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/omae2022-79862.
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Abstract The residual curvature (RC) method has been implemented by Subsea 7 for lateral buckling mitigation on various projects in recent years. The method involves deploying short sections of under-straight pipe in the catenary from a reel-lay vessel. The objective of this paper is to present RC results on bending moment and curvature and to show how these results can be combined with those from dynamic Orcaflex runs to predict the allowable sea-state for installation. ABAQUS models to simulate the reeling/unreeling/straightening procedure on one of Subsea 7’s reel-lay vessels are presented, together with a description of the settings adjustment to achieve under-straight pipe with a prescribed level of residual plastic strain. These models describe the pipe profile on the reel, free-span, aligner, passage through the straightener and finally within the catenary to the seabed. The model is used to simulate the deployment of an RC section and to quantify its tendency to rotate in the sag-bend. The dynamic loads are captured by running an equivalent RC section model in Orcaflex. Results for installation of a typical 14″ × 18″ pipe-in-pipe (PIP) are presented in 115m water depth (WD). Plots showing the spatial distribution of the bending moment and curvature of the RC section at various time increments within the catenary are provided. Attention is focused on the sag-bend. Stress-strain hysteresis loops are presented showing the multiple bending cycles experienced by the RC section from initial spooling-on until eventual deployment on the seabed. The impact that the RC length, residual plastic strain and ramp angle has on the bending moment/curvature is discussed. Orcaflex results are presented which show dynamic change in curvature at the sag-bend over a typical three-hour interval due to vessel motion. The most characteristic dynamic load (Ref. /15/) on the RC section is calculated to establish the loading envelope seen in the sag-bend region. Checks are also undertaken at other locations to ensure that the dynamic loads are not introducing any additional residual plastic strain in the RC section. The maximum bending moment seen by the RC section in the sagbend has an important bearing on the allowable sea-state for installation. The presented methodology for calculating the allowable sea-state (combining results of static and dynamic simulations) is a novel feature in the present work.
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Erdogan, Julien Erdem, Mauro Sartori, Michal Ambor, and Stefano Barone. "Base Isolation for Seismic Retrofitting of Flexible Residential Building." In IABSE Congress, New York, New York 2019: The Evolving Metropolis. International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.1029.
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<p>Cities facing post-seismic event trauma frequently make the choice of base isolation technology for the retrofitting or reconstruction of their strategic facilities to guarantee the continuity of the services critical to their population. Consequently, most hospital and emergency buildings are base isolated in earthquake prone cities. On the contrary, the technology is very seldom used for residential buildings. In cities where a large part of the private housing building stock is made of 8 to 12-storey high RC frame buildings, two reasons are usually put forward to discard retrofitting by base isolation: the supposed high cost of the isolation system and its low efficiency due to its structural flexibility.</p><p>Two recent case studies demonstrate the relevance of base isolation for the retrofitting of typical RC frame housing building. The design of the retrofitting of an 11-storey RC frame structure in Mexico City will first be presented. The second case study will detail the Moda Building in Istanbul, a 10-storey RC structure for which seismic retrofitting has recently been completed using base isolation.</p><p>The base isolation retrofitting of these two flexible buildings will be detailed in this paper, demonstrating the efficiency of such a retrofitting solution for residential building, both in terms of cost and dynamic behavior..</p>
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Inaba, Satoru, Takuya Anabuki, Kazutaka Shirai, Shuichi Yabana, and Seiji Kitamura. "Shaking Table Tests With Large Test Specimens of Seismically Isolated FBR Plants: Part 2—Damage Test of Reinforced Concrete Wall Structure." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77603.
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This paper describes the dynamic damage test of a reinforced concrete (RC) wall structure with seismic isolation sysytem. It has been expected that seismically isolated structures are damaged in sudden when the accelerations of the structures exceed a certain level by hardening of the rubber bearings. However, the response behavior and the damage mode have not been observed by experimental test yet. So, shaking table tests were carried out at “E-Defense”, equipping the world’s largest shaking table, located at Miki City, Hyogo prefecture, Japan. The specimen was composed of an upper structure of 600 ton by weight and six lead-rubber bearings (LRBs) of 505 mm in diameter which provide both stiffness and hysteretic damping. The upper structure consisted of a RC mass and four RC walls with counter weight. The RC wall structure was designed so that the damage of the RC wall occurred between the shear force at the hardening of the rubber bearings and that at their breaking. The dimensions of the RC wall were 1600 × 800 × 100 mm (B × H × t). The reinforcement ratios were 2.46% in vertical by D13 (deformed reinforcing bar, 13 mm in diameter) and 1.0% in horizontal by D10. The shaking table test was conducted consecutively by increasing the levels up to 225% of tentative design earthquake motion. Consequently, because of the increase of the structural response by the hardening of the rubber bearings, the damage of the wall structure with seismic isolation system suddenly happened. In addition, the preliminary finite element analysis simulated the test results fairly well, which were the restoring force characteristics, the crack patterns of the RC wall structure and such.
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Kang, Zuoyi, Yukihiko Okuda, Akemi Nishida, Haruji Tsubota, and Yinsheng Li. "Analytical Study of Perforation Damage to Reinforced Concrete Slabs Subjected to Oblique Impact by Projectiles With Different Nose Shapes." In 2020 International Conference on Nuclear Engineering collocated with the ASME 2020 Power Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/icone2020-16855.
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Abstract Considerable research has been carried out to establish a rational assessment method for nuclear power plants against local damage caused by an accidental projectile impact. Most of the empirical formulas that have been proposed seek to quantitatively investigate local damage to reinforced concrete (RC) structures caused by a rigid projectile impact. These formulas have been derived based on impact tests performed perpendicular to the target structure, while only a few impact tests oblique to the target structure have been studied. This study aims to propose a new formula for evaluating local damage to RC structures caused by oblique impact based on experimental and simulation results. At present, we have validated an analytical method via comparison with experimental results and have conducted simulation analyses of oblique impact assessments on RC slabs using various projectiles with flat nose shapes. In this study, the same analytical method will be used to investigate perforation damage to RC slabs subjected to oblique impact by projectiles with hemispherical nose shapes. In this paper, the effects of projectiles’ nose shapes on perforation damage to RC slabs, the residual velocity of projectiles and the time history of energy transmission will be discussed.
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Kang, Zuoyi, Yukihiko Okuda, Akemi Nishida, Haruji Tsubota, and Yinsheng Li. "Local Damage to Reinforced Concrete Panels Subjected to Oblique Impact by Projectiles: Numerical Analysis on Test Results." In 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-88884.
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Abstract This study aims at proposing a numerical analysis method to evaluate local damage to reinforced concrete (RC) panel caused by projectile impact. To validate the proposed numerical analysis method, we recently conducted a series of impact tests with normal and oblique impacts due to rigid and soft projectiles. We intend to compare the numerical results with experimental results including reaction forces, damage modes of RC panel and soft projectile in oblique impact. In the numerical analysis for evaluation of local damage to RC panel, there are several key parameters, such as material properties, contact conditions between concrete and projectile. In addition to these parameters, we also focused on the reaction forces of RC panel, which is important when investigating the impact effects on structure under projectile impact. Since the stiffness of support structure is represented as a spring element in finite element (FE) model, we examined the relationship between the spring stiffness and numerically computed reaction forces in oblique impact. The numerical analysis method for oblique impact is validated, and the local damage in the RC panel is evaluated, by comparing experimental and numerical results.
Reports on the topic "RC Thesis"
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MECHANICAL PROPERTIES OF KINKED STEEL PLATES AND THEIR APPLICATIONS IN FRAME STRUCTURES. The Hong Kong Institute of Steel Construction, 2022. http://dx.doi.org/10.18057/icass2020.p.314.
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To effectively improve the ability of frame structures to comprehensively defend against seismic collapse and progressive collapse, this paper proposes a novel configuration, kinked steel plate (KP). The mechanical properties of KP were studied through test and numerical simulation. It is found that when KP is in tension, the resistance that can provide in the small deformation stage is lower, but it can provide a resistance equivalent to that of ordinary straight steel plates after being straightened. When KP in compression, the resistance that can provide is very small and can be ignored. Then, the application of KP in steel frame and reinforced concrete (RC) frame structure was discussed. For the application of KP in steel frames, KP is combined with the reduced beam section (RBS) connection, which can obtain an innovative connection (RBS-KP) containing KP. For the application of KP in RC frame, KP is added to RC beams, and a new type of RC beam containing KP is proposed. The seismic and progressive collapse performances of the RBS-KP connection and the new type of RC beam were studied by numerical simulation. Results illustrate that the RBS-KP connection has comparable seismic performance and greater resistance against progressive collapse than the RBS connection, as is the new type of RC beam relative to the RC beam.
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LOAD TRANSFER MECHANISM OF STEEL GIRDER-RC PIER CONNECTION IN COMPOSITE RIGID-FRAME BRIDGE. The Hong Kong Institute of Steel Construction, 2022. http://dx.doi.org/10.18057/icass2020.p.286.
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The composite rigid-frame bridge, where the steel girder and the reinforced concrete (RC) pier are rigidly connected, has a high bearing capacity and superior long-term performance. The steel girder-RC pier connection is the critical detail for the design of such a structural form. To this end, a detailed review of composite rigid-frame bridges in China and abroad was carried out to summarize various forms of connections and evaluate their applicability. A novel connection type was then proposed to improve the connective performance between steel plate girders and RC piers. Threedimensional finite element models were further developed to investigate the force transfer mechanism, accounting for the impact of concrete stress, shear force in the connectors, and stress of steel plates. The results indicated that the proposed connection was capable of transmitting external loads reliably, and its ultimate bearing capacity exceeded design loads. The shear force of perfobond connectors, the tension of reinforcement, and the bearing effect of the bottom flange provided the major force transmission path to resist the external load.