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Dissertations / Theses on the topic 'Concrete construction – Joints'
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1
黃崑 and Kun Huang. "Design and detailing of diagonally reinforced interior beam-column joints for moderate seismicity regions." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31244233.
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Wong, Ho Fai. "Shear strength and seismic performance of non-seismically designed reinforced concrete beam-column joints /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202005%20WONG.
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Lau, Shuk-lei. "Rehabilitation of reinforced concrete beam-column joints using glass fibre reinforced polymer sheets." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B32001630.
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Lau, Shuk-lei, and 劉淑妮. "Rehabilitation of reinforced concrete beam-column joints using glass fibre reinforced polymer sheets." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B32001630.
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Noor, Iqbal. "A study of an interior joint for large panel precast buildings /." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63810.
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El-Amoury, Tarek Abbas Ghobarah Ahmed. "Seismic rehabilitation of concrete frame beam-column joints /." *McMaster only, 2004.
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Li, Jing, and 李靜. "Effects of diagonal steel bars on performance of interior beam-column joints constructed with high-strength concrete." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31244464.
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Engindeniz, Murat. "Repair and strengthening of Pre-1970 reinforced concrete corner beam-column joints using CFRP composites." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24808.
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Thesis (Ph.D.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2008.Committee Co-Chair: Kahn, Lawrence F.; Committee Co-Chair: Zureick, Abdul-Hamid; Committee Member: Armanios, Erian A.; Committee Member: Gentry, Russell T.; Committee Member: Leon, Roberto T.
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Ridwan. "Reinforced concrete beam-column joints strengthened in shear with embedded bars." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/7138/.
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Beam-column (BC) joints play an important role in the seismic performance of moment-resisting reinforced concrete (RC) frame structures. Without adequate joint shear reinforcement, BC joints can be the most vulnerable elements during an earthquake. Several techniques for improving the seismic performance of BC joints have been proposed, but they have been criticised for being labour-intensive and/or susceptible to premature debonding. This research explores the application of the deep embedment technique for strengthening a shear-deficient beam-column joint. Two approaches, experimental and finite element (FE) study were conducted. The experiment contained the tests of seven exterior RC BC joints under constant column axial load and a reverse cyclic load at the beam end. Variables considered during the experiments were the material type and embedded reinforcement ratio. The FE study included the modelling of the tested specimens using ABAQUS and parametric study to asses the effect of column axial load, concrete compressive strength and embedded bar size on joint shear strength. The experimental results showed the strengthened specimens had superior global and local behaviour compared to the control one. In addition, the maximum joint shear strength also changes linearly with the variation of the concrete strength, column axial load and embedded bar size.
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Gu, Xue Fan 1956. "Shear behaviour of sandstone-concrete joints and pile shafts in sandstone." Monash University, Dept. of Civil Engineering, 2001. http://arrow.monash.edu.au/hdl/1959.1/8856.
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Yuan, Lie Ping. "Partial interaction behaviour of bolted side plated reinforced concrete beams." Title page, abstract and contents only, 2003. http://web4.library.adelaide.edu.au/theses/09PH/09phl7161.pdf.
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Includes bibliographical references (p. 185-189) Aims to determine the effect of partial interaction on the behaviour of the concrete beam, plate and bolt connector components of the composite plated beam. Develops design rules for the determination of the ultimate capacity for bolted plate reinforced composite beams.
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Zerkane, Ali S. H. "Cyclic Loading Behavior of CFRP-Wrapped Non-Ductile Reinforced Concrete Beam-Column Joints." PDXScholar, 2016. http://pdxscholar.library.pdx.edu/open_access_etds/3000.
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Use of fiber reinforced polymer (FRP) material has been a good solution for many problems in many fields. FRP is available in different types (carbon and glass) and shapes (sheets, rods, and laminates). Civil engineers have used this material to overcome the weakness of concrete members that may have been caused by substandard design or due to changes in the load distribution or to correct the weakness of concrete structures over time specially those subjected to hostile weather conditions. The attachment of FRP material to concrete surfaces to promote the function of the concrete members within the frame system is called Externally Bonded Fiber Reinforced Polymer Systems. Another common way to use the FRP is called Near Surface Mounted (NSM) whereby the material is inserted into the concrete members through grooves within the concrete cover. Concrete beam-column joints designed and constructed before 1970s were characterized by weak column-strong beam. Lack of transverse reinforcement within the joint reign, hence lack of ductility in the joints, and weak concrete could be one of the main reasons that many concrete buildings failed during earthquakes around the world. A technique was used in the present work to compensate for the lack of transverse reinforcement in the beam-column joint by using the carbon fiber reinforced polymer (CFRP) sheets as an Externally Bonded Fiber Reinforced Polymer System in order to retrofit the joint region, and to transfer the failure to the concrete beams. Six specimens in one third scale were designed, constructed, and tested. The proposed retrofitting technique proved to be very effective in improving the behavior of non-ductile beam-column joints, and to change the final mode of failure. The comparison between beam-column joints before and after retrofitting is presented in this study as exhibited by load versus deflection, load versus CFRP strain, energy dissipation, and ductility.
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Mostert, Louwrens Hubert. "Design and construction preferences for connections in the precast concrete industry of South Africa." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96036.
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Thesis (MEng)--Stellenbosch University, 2014.ENGLISH ABSTRACT: Precast concrete has been used for decades in the construction industry, locally as well as internationally. Rapid urban development and the need for shorter construction periods for building and infrastructure projects have however encouraged more use of precast concrete construction. The improved speed of construction, high quality and less labour requirements that precast offers makes it an effective type of construction method for modern development. The utilization of various precast concrete systems has been frequently used in the international construction industry, making it a very popular construction method. It was however found that one of the major drawbacks or concerns with the use of precast concrete is the connections between the precast elements. In-situ construction does not have this problem, because it is designed to a monolithic structure or building. It was identified that if the connections in precast buildings or structures are designed or constructed in an insufficient way, it can lead to severe structural problems and even failure. This highlights the importance the design and construction of precast concrete connections have on the overall stability, strength and robustness of the structure. Precast concrete buildings are not merely separate precast elements, connected together to eventually form the same principals of in-situ construction. Precast concrete and connection design is considered to be a specialist field and requires the sufficient expertise and knowledge to understand the structural system and all its different aspects. The precast connection’s function is not merely to transfer loads, but also to develop continuity and ensure monolithic behaviour of the entire precast concrete structure (Englekirk 2003). The most important or desirable structural functions of precast connections are; (i) direct transfer of loads (load paths and flow or forces), (ii) develop structural continuity and integrity, (iii) distribution of concentrated loads, (iv) allow for movements and unintended restraints and lastly to (v) ensure efficient rigidity and robustness for the connection. It can be seen that there is many factors that contribute to the overall design and construction phases of precast concrete connections. The aim of this study is to identify and investigate aspects that influence the design and construction of precast concrete connections. This study will mainly focus on precast concrete and precast connection preferences of participants in the South African construction industry. During this study, industry participants (contractors and consultants) were asked to identify certain aspects and concerns associated with precast concrete and precast connection construction. These answers were used to develop guidelines and preferences that can be used by industry participants to improvise and effectively manage the precast construction, mainly focussing on the connections between the precast elements.
AFRIKAANSE OPSOMMING: Voorafvervaardigde beton word al vir dekades gebruik in die konstruksiebedryf, plaaslik sowel as internasionaal. Vinnige stedelike ontwikkeling en die behoefte vir korter konstruksie tydperke vir die struktuur en infrastruktuur projekte het egter die gebruik en implementasie van voorafvervaardigde beton konstruksie laat toeneem. Die verbeterde spoed van die konstruksie proses, 'n hoë gehalte produk en minder arbeid vereistes wat voorafvervaardiging bied maak dit dus 'n effektiewe tipe konstruksie metode vir moderne ontwikkelings. Die benutting van verskeie voorafvervaardigde beton sisteme en elemente word reeds herhaaldelik gebruik in die internasionale konstruksiebedryf, wat dit vervolglik ʼn baie populêre en effektiewe sisteem maak. Dit is egter bevind dat een van die groot struikelblokke of probleme met die gebruik van voorafvervaardigde beton is die verbindings tussen die voorafvervaardigde elemente. In-situ beton konstruksie het dus nie hierdie probleem nie, want dit word ontwerp om 'n monolitiese beton struktuur of gebou te vorm. Dit was immers geïdentifiseer dat as die verbindings in ʼn voorafvervaardigde gebou of struktuur, ontwerp word deur ʼn ontoereikende manier, dit kan lei tot ernstige strukturele probleme en selfs strukturele faling. Dit beklemtoon dus die belangrikheid wat die ontwerp en konstruksie proses van voorafvervaardigde beton verbindings het op die algehele stabiliteit, sterkte en robuustheid van die struktuur. Voorafvervaardigde beton geboue en strukture kan nie slegs beskou word as aparte voorafvervaardigde elemente wat met mekaar verbind word om eventueel dieselfde beginsels van insitu konstruksie te vorm nie. Voorafvervaardigde beton en verbinding ontwerp word beskou as 'n spesialis veld en vereis dat die ontwerper die nodige kundigheid en kennis van die strukturele stelsel en al sy verskillende aspekte verstaan. Voorafvervaardigde beton verbindings se funksie is nie net om toegepaste kragte oor te dra nie, maar ook om strukturele kontinuïteit te ontwikkel en te verseker dat monolitiese gedrag gehandhaaf word vir die hele voorafvervaardigde beton struktuur (Englekirk 2003). Die mees belangrike strukturele funksies van voorafvervaardigde beton verbindings sluit die volgende in; (i) verseker direkte oordrag van toegepaste kragte (vloei van kragte), (ii) ontwikkeling van strukturele kontinuïteit en integriteit, (iii) die verspreiding van puntbelastings, (iv) moet voorsiening maak vir die bewegings in die voorafvervaardigde element en konneksie self en laastens (v) verskaf doeltreffende rigiditeit en robuustheid vir die konneksie sone. Dus kan daar afgelei word dat daar baie faktore is wat bydra tot die algehele ontwerp en konstruksie fases van voorafvervaardigde beton verbindings. Die doel van hierdie studie is om aspekte te identifiseer en te ondersoek wat die ontwerp en konstruksie van aspekte beton verbindings wel beïnvloed. Die studie sal hoofsaaklik fokus op voorafvervaardigde beton en verbindings voorkeure van persone in die Suid-Afrikaanse konstruksiebedryf. Tydens die studie was persone in die industrie (kontrakteurs en konsultante) ook gevra om sekere aspekte en kwellings wat verband hou met voorafvervaardigde beton asook die verbindings te identifiseer. Die antwoorde wat verkry was uit die industrie deelnemers kan toepaslik gebruik om word riglyne en voorkeure op te stel wat vervolglik gebruik en toegepas kan word in die konstruksie bedryf van Suid Afrika. Die riglyne kan effektief gebruik word om voorafvervaardigde beton asook die verbindings te verbeter en persone in die konstruksie bedryf in te lig oor voorkeure en toepassings van hierdie metode.
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Deaton, James B. "Nonlinear finite element analysis of reinforced concrete exterior beam-column joints with nonseismic detailing." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47538.
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This research investigated the behavior of nonseismically detailed reinforced concrete exterior beam-column joints subjected to bidirectional lateral cyclic loading using nonlinear finite element analysis (NLFEA).
Beam-column joints constitute a critical component in the load path of reinforced concrete buildings due to their fundamental role in integrating the overall structural system. Earthquake reconnaissance reports reveal that failure of joints has contributed to partial or complete collapse of reinforced concrete buildings designed without consideration for large lateral loads, resulting in significant economic impact and loss of life. Such infrastructure exists throughout seismically active regions worldwide, and the large-scale risk associated with such deficiencies is not fully known. Computational strategies provide a useful complement to the existing experimental literature on joint behavior and are needed to more fully characterize the failure processes in seismically deficient beam-column joints subjected to realistic failure conditions. Prior to this study, vulnerable reinforced concrete corner beam-column joints including the slab had not been analyzed using nonlinear finite element analysis and compared with experimental results.
The first part of this research focused on identification and validation of a constitutive modeling strategy capable of simulating the behaviors known to dominate failure of beam-column joints under cyclic lateral load using NLFEA. This prototype model was formulated by combining a rotating smeared crack concrete constitutive model with a reinforcing bar plasticity model and nonlinear bond-slip formulation. This model was systematically validated against experimental data, and parametric studies were conducted to determine the sensitivity of the response to various material properties. The prototype model was then used to simulate the cyclic response of four seismically deficient beam-column joints which had been previously evaluated experimentally. The simulated joints included: a one-way exterior joint, a two-way beam-column exterior corner joint, and a series of two-way beam-column-slab exterior corner joints with varying degrees of seismic vulnerability. The two-way corner joint specimens were evaluated under simultaneous cyclic bidirectional lateral and cyclic column axial loading. For each specimen, the ability of the prototype model to capture the strength, stiffness degradation, energy dissipation, joint shear strength, and progressive failure mechanisms (e.g. cracking) was demonstrated.
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Chen, Te-Hsiu. "Retrofit strategy of non-seismically designed frame systems based on a metallic haunch system." Thesis, University of Canterbury. Civil Engineering, 2006. http://hdl.handle.net/10092/1222.
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Due to the lack of capacity design principles as well as of appropriate structural details, most of the reinforced concrete building designed primarily for gravity loads as typical of pre- 1970s code provisions, are expected and has been demonstrate to suffer sever damage or total collapse under the earthquake excitation. Due to the use of plain round bar and inadequate reinforcing details, critical shear failure in the joint connection region could occur, leading to sever damage when not total collapse of the building. In this research project, a comprehensive experimental programme was carried to investigate the seismic performance of existing beam column joints prior and after retrofit intervention with a recently proposed low-invasive retrofit technique based on a metallic haunch system. The joint performance was evaluated in terms of the principal tensile stresses that caused the joint shear cracks in the joint panel zone. Quasi-static cyclic tests under uni-directional or bidirection loading regime were carried out to record the response of a series of under-designed beam column joints (with either a wide-beam or a deep-beam solution, deformed or plain round bars with end hooks). The experimental results were used to investigate the effect of structural detailing and loading regime on the seismic performance. To retrofit the potential deficiencies in the existing beam-column joints, the feasibility and efficiency of a low invasive retrofit solution based on a diagonal metallic haunch was investigated. The proposed haunch retrofit solution aims to provides an economic, ease of implementation alternative to protect the joint from the brittle shear failure by relocating the beam plastic hinge away form the joint panel zone. To achieve the desired capacity design (hierarchy of strength) and sequence of event, a simplified analytical formulation has been adopted to account for the joint shear strength in terms of principle tensile/compression stresses prior and after the retrofit intervention. A useful visualization tool based on a M-N (moment-axial load) performance domain can be adopted to evaluate the actual performance point and events, by comparing demand vs. capacity. Designed charts are proposed based on displacement compatibility conditions to evaluate the efficiency of the haunch solution. In addition, a complete step-by step design procedure to implement the retrofit strategy and intervention to achieve the desired hierarchy of strength, by using the proposed diagonal metallic haunch solution, is derived and presented. The effectiveness of the proposed haunch solution and reliability of the derived analytical design/assessment procedure, were validated through experimental tests of 2-D and 3-D subassemblies, shown in the first experimental part to have the most vulnerable behaviour in the joint panel zone. Conceptual issues related to the design of the retrofit intervention, when moving from a 2-D to a 3-D behaviour are discussed. The experimental results showed an excellent performance of the proposed intervention, able to protect the panel zone region (by limiting the principle tensile stress demand), while enforcing the formation of a plastic hinge in the beam, far away from the joint interface. As a result, a much more stable inelastic response could be developed, confirming the high potential of such a low-invasive, low-cost retrofit intervention on under-designed frame systems. In conclusion, a simple numerical model, based on a lumped plasticity approach, was developed and validated on the experimental results to capture the full response of the subassembly prior and after the retrofit intervention.
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Sandahl, William, and Jesper Bragsjö. "Utdragskapacitet Sidokoppling Håldäck." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-34506.
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To achieve structural integrity in precast concrete systems, connections between elements must be capable to transfer both vertical and horizontal loads which puts high demands on single ties. Hollow-core slabs are often used to stabilize the structural system which puts high demands on the connections between the slab and the buildings stabilizing units. Because of this, the connections need to withstand high tensile and shear forces. The purpose of this report is to investigate the tensile capacity of tie-connections used between hollow-core slabs that are parallel with e.g. stabilizing walls and compare with current design methods. Current design methods suggest that tensile failure will occur in the roof and bottom of the cores which provides low design capacities. Two connections are investigated through full scale pull-out tests where the results are compared with the design methods. The results from testing the tensile capacity show that the failure module occurred as suggested. However, the tests show significantly higher capacity than proposed by the design methods. Eurocodes Design assisted by testing are applied to the test result and a new design method is proposed. Both provides design values that are approximately twice as large as the values suggested in previous design methods.
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Blažek, Jan. "Návrh nosné železobetonové konstrukce administrativního objektu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226440.
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The subject of this thesis is the project of the foundational board and of reinforced concrete walls of the underground office building with respect to the limit state of crack width. There is designed the execution of joints of various parts of the construction against infiltration of groundwater into the interior. The drawing documentation of designed parts is performed there. In the theoretical part, there are logged the design principles and implementation of the white tubs.
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Mitra, Nilanjan. "An analytical study of reinforced concrete beam-column joint behavior under seismic loading /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/10156.
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Jang, Se Hoon. "Automated crack control analysis for concrete pavement construction." Thesis, Texas A&M University, 2005. http://hdl.handle.net/1969.1/2553.
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The focus of this research is on the control of random cracking in concrete paving by using sawcut notch locations in the early stages of construction. This is a major concern in concrete pavement construction. This research also addresses a probabilistic approach to determine the optimum time and depth of sawcutting for newly constructed portland cement concrete pavements. Variability in climate conditions and material characteristics during the hardening process affects the potential of cracking at any sawcut depth. Several factors affecting the probability of crack initiation are material strength parameters, method and quality of curing, slab/subbase stiffness, the amount and depth of steel reinforcement, friction between the slab and the subbase, and concrete shrinkage. Other factors relevant to concrete mixture characteristics such as cement content and type of coarse aggregate affect development of early aged stresses caused by shrinkage and thermally induced contraction. A probabilistic analysis of the factors that affect crack control using sawcut notches is presented in relation to different weather conditions (concrete placement temperature) at the time of construction, and concrete mixture characteristics such as fly ash replacement (FA) and cement factor (CF). Both of these significantly affect sawcut timing and depth requirement. The determination of crack initiation is based on fracture mechanics. Estimation of the time of cracking is based on predicted tensile strength and stress in the concrete at the bottom of the sawcut notch to assess the feasibility of crack control in the early stages of construction.
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Joy, Westin T. "Concrete capacity design of the Cazaly hanger." Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1799711381&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.
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Cmajdálková, Alžběta. "Vícepodlažní budova." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371883.
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The subject of the master’s thesis is static design and assessment of the static load-bearing steel structure. The structure is designed for the site Brno. Specifically this is an eight-storey office building with a 54 x 12 m floor plan and a total height is 30,2 m. The steel structure is lovated betwrrn teo reinforced concrete towers secure for vertical transport. The structure is designed in three variants. In the one of them a steel frame with hingee attached elements. The ceiling structure is designed as composite steel and concrete structure.
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Hertanto, Eric. "Seismic Assessment of Pre-1970s Reinforced Concrete Structure." Thesis, University of Canterbury. Civil Engineering, 2005. http://hdl.handle.net/10092/1120.
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Reinforced concrete structures designed in pre-1970s are vulnerable under earthquakes due to lack of seismic detailing to provide adequate ductility. Typical deficiencies of pre-1970s reinforced concrete structures are (a) use of plain bars as longitudinal reinforcement, (b) inadequate anchorage of beam longitudinal reinforcement in the column (particularly exterior column), (c) lack of joint transverse reinforcement if any, (d) lapped splices located just above joint, and (e) low concrete strength. Furthermore, the use of infill walls is a controversial issue because it can help to provide additional stiffness to the structure on the positive side and on the negative side it can increase the possibility of soft-storey mechanisms if it is distributed irregularly. Experimental research to investigate the possible seismic behaviour of pre-1970s reinforced concrete structures have been carried out in the past. However, there is still an absence of experimental tests on the 3-D response of existing beam-column joints under bi-directional cyclic loading, such as corner joints. As part of the research work herein presented, a series of experimental tests on beam-column subassemblies with typical detailing of pre-1970s buildings has been carried out to investigate the behaviour of existing reinforced concrete structures. Six two-third scale plane frame exterior beam-column joint subassemblies were constructed and tested under quasi-static cyclic loading in the Structural Laboratory of the University of Canterbury. The reinforcement detailing and beam dimension were varied to investigate their effect on the seismic behaviour. Four specimens were conventional deep beam-column joint, with two of them using deformed longitudinal bars and beam bars bent in to the joint and the two others using plain round longitudinal bars and beam bars with end hooks. The other two specimens were shallow beam-column joint, one with deformed longitudinal bars and beam bars bent in to the joint, the other with plain round longitudinal bars and beam bars with end hooks. All units had one transverse reinforcement in the joint. The results of the experimental tests indicated that conventional exterior beam-column joint with typical detailing of pre-1970s building would experience serious diagonal tension cracking in the joint panel under earthquake. The use of plain round bars with end hooks for beam longitudinal reinforcement results in more severe damage in the joint core when compared to the use of deformed bars for beam longitudinal reinforcement bent in to the joint, due to the combination of bar slips and concrete crushing. One interesting outcome is that the use of shallow beam in the exterior beam-column joint could avoid the joint cracking due to the beam size although the strength provided lower when compared with the use of deep beam with equal moment capacity. Therefore, taking into account the low strength and stiffness, shallow beam can be reintroduced as an alternative solution in design process. In addition, the presence of single transverse reinforcement in the joint core can provide additional confinement after the first crack occurred, thus delaying the strength degradation of the structure. Three two-third scale space frame corner beam-column joint subassemblies were also constructed to investigate the biaxial loading effect. Two specimens were deep-deep beam-corner column joint specimens and the other one was deep-shallow beam-corner column joint specimen. One deep-deep beam-corner column joint specimen was not using any transverse reinforcement in the joint core while the two other specimens were using one transverse reinforcement in the joint core. Plain round longitudinal bars were used for all units with hook anchorage for the beam bars. Results from the tests confirmed the evidences from earthquake damage observations with the exterior 3-D (corner) beam-column joint subjected to biaxial loading would have less strength and suffer higher damage in the joint area under earthquake. Furthermore, the joint shear relation in the two directions is calibrated from the results to provide better analysis. An analytical model was used to simulate the seismic behaviour of the joints with the help of Ruaumoko software. Alternative strength degradation curves corresponding to different reinforcement detailing of beam-column joint unit were proposed based on the test results.
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Chaloupka, Petr. "Lávka mezi budovami." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225486.
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This master's thesis deals with the designing of the appropriate supporting steel structure footbridge for pedestrians. The footbridge is used to connect two separate buildings (buildings D and Z at the Faculty of Civil Engineering Brno University of Technology). Four variants have been designed about solutions supporting steel structure. The final variant was prepared in detail and was carried out static assessment of the individual elements and selected details. The main supporting structure of this variant are two trusses. Diagonals of these trusses are designed linkage system of Macalloy 460. Bridge deck is designed of composite steel a concrete board with crossbars. The footbridge is designed as simple beam with an overhanging end. Length span is 34.8 m, length overhanging ends is 5.8 meters. The total length of the footbridge is 40.6 meters. Width of footbridge is 2.8 meters. Free width is 2 meters. In the cross point with the axis of local road is height of footbridge above ground 4.43 meters. Next to the building Z, there is a footbridge stored on a concrete support, near the building D, the footbridge is stored on a steel frame of support. The footbridge is deposited on elastomeric bearings. The footbridge is being protected from the weather. The sheating of the building is designed by Wictec 60 system. The master's thesis also contains drawing documentation of the proposed solution.
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Takorabet, Nacer. "Influence des interfaces sur le comportement des structures composites en béton armé : étude expérimentale et modélisation numérique par la méthode des éléments finis." Châtenay-Malabry, Ecole centrale de Paris, 1989. http://www.theses.fr/1989ECAP0106.
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Les structures de Génie Civil son fréquemment calculées comme monolithe. Cependant en pratique la plupart d'entre elles présentent des surface de reprise de bétonnage liées à leur mode d'exécution. Ces surfaces ont une grande influence sur le comportement des structures en sorte que des désordres, voire des ruptures peuvent se produire suivant ces discontinuités pré-existantes. L'étude entreprise a comporté des expérimentations et une modélisation numérique. Après l'examen de la bibliographie des phénomènes plus ou moins approchants, des essais sont exécutés pour une solution utilisée dans le développement d'un type de pont réalisé avec des éléments préfabriqués (poutres longitudinales précontraintes préfabriquées et prédalles constituant coffrage et ferraillage du hourdis supérieur coulé en place et supportant la surface de roulement). Dans l'état actuel des règlements les prédalles doivent être munies d' armatures de couture pour être prises en compte dans les calculs de flexion. Ces essais montrent qu'une prédalle sans couture et comportant des armatures longitidunales ancrées dans le béton de la dalle peut s'associer mécaniquement à celle-ci dans certaines limites. Les applications ont d'abord porté sur des éléments structuraux aux extrémités libres (planchers à prédalles, jonction âme de poutre-hourdis), donc favorables aux effets du cisaillement -glissement, permettant ainsi d'évaluer l'influence de certains paramètres. Pour les pièces non-armées à l'interface le comportement est monolithe tant que l'adhérence n'est pas rompue, au-delà ces éléments deviennent faibles et on assiste à un accroissement exagéré des flèches. La disposition d'une armature de couture améliore considérablement la tenue de ces pièces après rupture d'adhérence. Ceci est dû à la mobilisation d'un mécanisme de frottement rendu possible grâce à la compression apportée par la mise en traction des armatures de couture. Avec une bonne reprise le fonctionnement est satisfaisant, même si le monolithisme n'est pas toujours reconstitué. L'analyse par le calcul des essais réalisés confirme le monolithisme obtenu expérimentalement. Ce qui est prometteur pour le développement de ce type d'exécution et laisse espérer une bonne tenue des ouvrages existants. Sur chantier les conditions d'essais ne sont pas toujours réunies. Nous avons simulé une mauvaise adhérence (flaque d'eau, absence de propreté,. . . ) dans différentes zones de l'interface sur une longueur de 50cm. Un tel manque de précaution provoque une défaillance totale de la structure, ce qui montre q'un comportement structural théoriquement satisfaisant reste en réalité assujetti au mode d'exécution donc à la qualité du travail humain.
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Jetonický, Pavel. "Vícepodlažní budova." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226049.
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The subject of the master´s thesis is the design and assessment of the static load-bearing steel structure office building. It is an eight-storey building with a floor plan and dimensions 54x15m. The proposal has three variants. In one of them a steel frame with a hinge attached elements. These are the pillars, beams, trusses, joists and purlins, which are coupled with trapeze plate and thereby secure the stability of the position in the horizontal direction. The steel structure is placed between the reinforced concrete towers.
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Kudrna, Jan. "Návrh nosné konstrukce ŽB objektu garáží." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-239994.
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The diploma thesis deals with the design and assessment of reinforced concrete structure supporting two-storey building of the underground garage for cars. In the space above the garage is designed open area with public space. The project was designed especially outer water-impermeable construction method white bath and a base plate and a perimeter wall. The structure was designed as a comprehensive model. Computing analyzed by finite element method. All selected elements were assessed at the ultimate limit state and limit state, namely to limit state of cracking load and forced stress.
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Lepourry, Clémence. "Mise au point et caractérisation d’un système innovant de poutre hybride béton-acier : étude des comportements locaux et globaux." Thesis, Rennes, INSA, 2019. http://www.theses.fr/2019ISAR0016.
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L’objectif principal de cette thèse de doctorat est le développement et la caractérisation d’un procédé de poutres de grandes portées adapté aux entreprises de gros œuvre. En effet, les technologies industrielles existantes pour répondre à des franchissements importants ne sont pas en accords avec le savoir-faire des équipes chantiers. Dès lors, le groupe Legendre, par sa filiale Ingénova, a souhaité mettre au point une solution, simple de par sa mise en œuvre sur chantier, et qui vise un niveau d’exigence structurelle similaire aux technologies actuelles. Composée d’une poutre béton armé renforcée par une peau métallique extérieure, la poutre hybride béton-acier est la solution étudiée au sein de ce mémoire pour répondre à cette problématique. Pour assurer l’équilibre des efforts entre les deux matériaux, un système de connexion inédit a été développé. La caractérisation expérimentale n’ayant validé que deux dimensions de connecteurs, le modèle numérique a permis d’étendre l’étude et ainsi, déterminer une formule de dimensionnement généralisée. Le comportement local de la poutre connu, les investigations expérimentales se sont orientées sur la réponse de la poutre soumise à une flexion positive. L’impact de la connexion partielle en comparaison de la connexion complète a été quantifié à la fois sur la résistance de la poutre et sur ses déformations. Le modèle numérique, calibré sur les résultats des essais, a permis de valider l’utilisation de modèles analytiques issus de la littérature, adaptés au cas de la poutre hybride. Enfin le dernier volet de cette thèse concerne l’assemblage de la poutre hybride béton-acier avec un poteau mixte acier-béton tubulaire. Après une série d’essais pour caractériser la résistance et la rigidité de ce joint innovant, un modèle numérique de cette configuration a mis en évidence les transferts d’efforts nécessaires entre les deux matériaux. Ces derniers complètent le mode de fonctionnement classique de l’assemblage qui superpose à la fois un comportement béton armé et un comportement métallique. Un modèle analytique, développée au sein de cette thèse, a confirmé le dimensionnement de l’assemblage.Les résultats présentés dans ce mémoire ont été suffisants pour tester le procédé de poutre hybride béton-acier sur un chantier pilote. Le gain de la solution en comparaison aux technologies existantes a été confirmé par les équipes chantiersThe main goal of this Ph.D thesis is the development and the characterization of a solution for long-span beams in concrete buildings. Pre-stressed or composite beams are the possible technologies for beams up to twenty metres, but they are not adapted for concrete constructors. The main objective of Ingenova, the research and development affiliate of Legendre is to find a solution, which can be set up easily by concrete workers with good structural performance. The proposed solution is the concrete-steel hybrid beam, made of U-shape steel profile used as permanent formwork to encase a concrete beam. The association of the two beams also gives a convenient solution adapted to concrete builders. In this thesis, a series of experimental and numerical tests have been performed in order to assess the global and the local behaviour of the beam and its connections.Firstly, the connexion between concrete and steel is achieved by L-shaped angles welded on the upper flanges of the steel beam. Their behaviour has been studied by performing asymmetric push-out tests, which were used to validate a detailed finite element model. Based on the results obtained from a numerical parametric study of the validated a finite element model, an analytical expression of the shear resistance was then proposed.The global behaviour in sagging of the concrete-steel hybrid beam was also investigated by experimental and numerical tests. The impact of the partial interaction under deflection and bending moment resistance have been studied. The results show a ductile behaviour of the concrete-steel hybrid beam both in partial and in full interaction. Finally, an analytical method has been adapted to determine the ultimate flexural capacity of this innovative beam considering the degree of connection. The last part of this work concerns the joint between the concrete-steel hybrid beam and a concrete-filled steel tubular column. The behaviour of this hybrid joint was verified by full-scale experimental tests. A finite element model has also been developed in order to investigate more deeply into the load transferring mechanism within the joint. This FE model is validated by comparing its results against experimental data. An analytical model for the design of the joint is then proposed.This new technology has already been used in actual projects during the thesis. The design procedure of the members and of the joints has been approved by the CSTB, the French certification organism of construction. First feedback for the on-site erection were good, and workers enjoyed the quick assembly and the increase of security on site
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DEL, TORO RIVERA RAUL. "Comportement des noeuds d'ossature en beton arme sous sollicitations alternees." Marne-la-vallée, ENPC, 1988. http://www.theses.fr/1988ENPCA004.
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Etude des joints sous sollicitation sismique sur la base de trois essais sur corps d'epreuve de grande dimensionm en analysant les mecanismes des glissements constates des armatures principales dans la partie centrale du noeud, et le type de rupture a laquelle cela donne lieu; etude sur la base d'un essai de la possibilite d'utiliser un beton de fibres metalliques avec ferraillage transversal reduit
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Smělíková, Petra. "Přemostění řeky Svitavy a tratě ČD v Blansku." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227189.
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The aim of the Diploma Thesis is elaboration of study of bridge crossing over the Svitava river and ČD railway track in Blansko. It concerns a five-pole steel beam road bridge with through-span which carries road of the third category. The static system of the construction is solved as solid-web beam of 1.3 meters height which is in three middle spans reinforced by truss construction with top chord and system of diagonals without verticals. The height of the main beam where reinforced by trusswork is 4.75 meters. The width of spans in the road axis is 18.5 + 30.525 + 44.4 + 30.525 + 18,5 metres. The bridge deck consists of steel cross beams bonded with reinforced concrete slab of 200 millimeters of thickness. The drive-through width of the roadway is 7.0 meters. The bridge is fitted with right-sided walkway placed on steel cantilevers. The walk-through width of the walkway is 3.0 meters. Material used is S355 Steel, C30/37 Concrete and S460 Steel which is used for marginal spans of the bridge. Load-bearing construction is assessed in compliance with current technical requirements laid down by European Directives, so called “Eurocodes”. The calculation of inner powers is performed using the Scia Engineer 2013.1 software.
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Iskef, Alaa Eddin. "Technologies informatiques pour l'étude du comportement expérimental et numérique d'un assemblage poutre-poteau en béton armé." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLN015/document.
Full textAbstract:
L'analyse du comportement des assemblages poteau-poutre en béton armé ainsi que leur influence sur la résistance de l'ensemble de la structure sous chargement cyclique ou sismique a fait l'objet de plusieurs investigations ces dernières années. Toutefois, le comportement de cette partie de structure reste loin d'être maitrisé à cause de la complexité de cet assemblage qui fait intervenir plusieurs phénomènes physiques, et à cause du manque de données expérimentales. Ce travail a pour but de mettre en place et fournir une base de données expérimentales fiable et dense dont la vocation est de donner accès à un benchmark expérimental pour permettre la modélisation et la validation du comportement de ces assemblagesThe behavior of reinforced concrete beam-column joints and their influence on the strength of the structures under cyclic or seismic loadings has been the subject of several investigations in recent years. However, the behavior of that part of the structure remains far from being mastered due to the complexity of the assembly involving several physical phenomena and due to the lack of exhaustive experimental data. This work aims to implement and provide a reliable and dense experimental database whose vocation is to provide access to an experimental benchmark to enable the modeling and validation of the behavior of these assemblies
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Pešák, Radek. "Nákupní centrum ve Frýdku-Místku." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-391983.
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The aim of the diploma thesis is to construct a steel shopping mall hall. The construction is located in Frýdek-Místek. The whole object can be divided in two parts. One part of the building is an atrium with a cross bridge made from glass. The roof construction of the atrium is designed as system of cylindrical lattice girders within purlins are set up. The other part of the construction is multistoried shopping mall with terrace designed as composite steel and concrete structure. The whole ground plan size of the construction is 72 m x 120 m. The height of the construction above the ground is 12.06 m. The cross-links are built up to 6 m one. There were created two versions of the construction. The most convenient version is described in more details. The outcome of the thesis is a comparison of two above mentioned versions. The whole project is based on officially recognised standard ČSN EN. The construction was designed in RFEM programme.
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Moc, Ondřej. "Projekt budovy na Václavském náměstí." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225355.
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The Diploma’s thesis deals with the design of selected parts of reinforced and prestressed concrete structure. Internal forces were solved by software SCIA ENGINEER. Prestress concrete element was solved by module TDA. Phases of construction were considered. Detailed solution is focused on the design of reinforced concrete floor slab with joists within the basement, reinforced concrete beam with five spans within the basement, reinforced girder within the basement, reinforced column within the basement, reinforced footing and prestressed concrete joist within the basement. Drawings of shape and drawings of reinforcement are included in this thesis. Other elements of construction were not solved in this thesis.
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Flašková, Veronika. "Komunitní centrum Petrovice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409993.
Full textAbstract:
The subject of diploma project is the design of complex of buildings using hemp lime composite, in English known as Hempcerete. Four detached houses are completed by building of facilities. Buildings have one to three floors. The composite fiercly reduces carbon footprint in building industry. The design is focused on different construction systems using hemp lime composite as a wall filling. Detached houses are made of load bearing timber frame with cast-in-situ hempcrete, building of facilities is made of reinforced concrete with precasted blocks. All buildings are cellarless. Detached houses are shed roofed, building of facilities is gable roofed.
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Neduchal, Zbyněk. "Modernizace bytového domu Vlhká 22, Brno." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-410057.
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The diploma thesis processes project documentation in the stage of construction for modernization of an apartment house near the center on the street Vlhká 22 in Brno. The building is divided into four residential floors and nonresidential basement and attic. On the first floor there are two residential units and the other four residential units. The foundation structures are made of solid bricks. The vertical load-bearing and non-load-bearing structures are also made of solid bricks. Exceptionally drywall partitions. In the basement, the ceiling structures are made of brick barrel vaults, above the above-ground floors there are wooden beamed ceilings. The roof structure of the building is made of purlin system with standing stool and covering of ceramic roof tiles. Three additional housing units will be built in the attic. In the basement, the masonry will be undercut by a chain saw, partly by pressure grouting and partly by a new layer with a waterproofing layer. All wood-beamed ceilings will be replaced with prefabricated ceiling beams with aerated concrete inserts without overhead slab. The garden part of the building will be insulated with mineral wool. The roof structure will be constructed from the street side as a shed roof and in the garden part a flat roof with a gradient layer of expanded polystyrene thermal insulation and a waterproofing layer of thermoplastic poleolefin.
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Carroll, James Christopher. "Modeling of Unreinforced Construction Joints in Plain Concrete Using GT STRUDL." 2005. http://trace.tennessee.edu/utk_gradthes/595.
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The purpose of this study was to develop a method to predict the behavior of unreinforced concrete construction joints using the computer program GT STRUDL. Two three-dimensional finite element models of a navigation lock wall were constructed. The wall was subjected to eccentric prestress forces, which brought about concern for lift-off within the lock wall.Eleven loading combinations were evaluated, which were created from seven independent loading conditions. Stresses for each loading combination were compared to nominal strength values as detennined by ACI 318-02, Chapter 22, for plain concrete. Results show the stresses to be acceptable throughout the wall and displacements to be negligible; thus, the structural integrity of the lock wall is adequate for continued operation.A detailed description of the study including the computer modeling, results, and recommendations are discussed in this thesis.
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Brink, Anna Catharina. "Modeling aggregate interlock load transfer at concrete pavement joints." Thesis, 2003. http://hdl.handle.net/2263/28110.
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Ernst, Stefan, University of Western Sydney, College of Health and Science, and School of Engineering. "Factors affecting the behaviour of the shear connection of steel-concrete composite beams." 2006. http://handle.uws.edu.au:8081/1959.7/32633.
Full textAbstract:
The inclusion of trapezoidal types of steel decking in the shear connection of composite beams has been found to significantly reduce their maximum strength and ductility by causing premature concrete-related failure modes. In order to investigate the complex behaviour and various load-transfer mechanisms that can occur in composite beams incorporating this type of connections, a total of 91 carefully-designed push-out tests were performed. Specific failure modes in conventionally reinforced specimens were initially induced by varying critical parameters. Specimens incorporating specific stud reinforcing devices were subsequently tested to suppress the undesirable failure modes. The concrete reinforcing and stud performance-enhancing devices, which included novel waveform-type reinforcement elements and spiral wire or ring components surrounding individual studs in secondary composite beams and special haunch reinforcement in primary beam applications, significantly delayed the onset and reduced the effect of the premature concrete-related failure modes. Hence, they increased the ultimate strength and ductility of the shear connection. The findings of the small-scale push-out tests were also verified in two full-scale composite beam tests which showed good agreement in shear connection behaviour and failure mode. Most of the design approaches currently used around the world take into account the weakening effect of trapezoidal types of decking by applying a reduction factor to the nominal strength that the same connection would have in a solid slab. From the test results, it is evident that not every shear connection incorporating steel decking, and within the limits of the associated standards, can be classified as ductile. A new and more reliable design approach is proposed which also incorporates the application of the various stud reinforcing devices. The key element of this design approach is to classify the anticipated connection behaviour, in regards to its deformation capacity, into ductile or brittle connections, hence ensuring satisfactory shear connection behaviour where the new types of trapezoidal steel decking are used. A reliability analysis of the new proposal is presented which enables the application of this new approach in accordance with AS 2327.1 (Standards Australia 2003). It is calibrated to provide a reliability index similar to stud applications currently in use. Simple strength reduction factors for the types of trapezoidal steel decking available in Australia are also provided which can be applied to the current solid slab shear connection strength for a fast and simplified design.Doctor of Philosophy (PhD)
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Peng, Shih-Wei. "Seismic resistant connections for concrete filled tube coulmn-to-WF beam moment resisting frames /." Diss., 2001. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3010421.
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Van, der Merwe Elizabeth Maria. "Behaviour of floor joint edges under hard-wheeled loads." Thesis, 2012. http://hdl.handle.net/10210/5843.
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M.Ing.This research project was initiated by a well-known international company (MAKRO SA), which had experienced floor joint problems occurring in their industrial floors. Floor joint problems i.e. joint damage and spalling of the joint area result, from a combination of construction workmanship and quality control problems, as well as from operational hard wheeled vehicle loading conditions. Damaging and spalling of joint edges are general problems occurring on warehouse floor slabs because of hard wheeled loads trafficking joints. In addition, joint filler detachment from the joint wall surface looks aesthetically poor and leaves the possibility of hygienic problems developing. In the case of MAKRO SA stores, the above problems are not acceptable and should be avoided at all costs. The objective of the report is to investigate solutions to solve the problem of joint damage in industrial floors due to problems occurring in practice, as described below. Floor joint edge problems are a result of three main reasons. First, subsoil quality. The quality of the subsoil is determined by the compaction effort and type of filler materials used, which in turn determine the amount of deflection that will be detected at joint edges. Subgrade quality determines whether deflection of the top concrete layer will occur. Poor compaction and filler material contributes to excessive deflection occurring due to inadequate support of the concrete floor slabs. Water penetration through the floor slab results in the fines of the subsoil being eroded or washed out, resulting in a less dense material, which will deflect under large vehicle and store racking loads. It is concluded that good quality subsoil conditions will result in less deflection and level irregularities of the top concrete floor slab, resulting in less joint damage and spalling. Secondly, the effect of floor and joint workmanship on damage and joint edge spalling. Level irregularities occur due to poor troweling or floating efforts at the joint area. Poor joint edge workmanship results from incorrect formwork removal from the joint wall resulting in a damaged joint edge and additional spalling of the joint to that occurring from wheel load impact. Joints undergo damage as forklifts traffic the joint area as wheel load and energy
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Lin, Ying-Ru, and 林英如. "Database Construction and Parameter Study of High-Strength Reinforced Concrete Beam-Column Joints Subjected to Cyclic Load Reversals." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/55245790647143401322.
Full textAbstract:
碩士國立雲林科技大學
營建工程系碩士班
99
This paper presents a database consist of 110 beam-column joint specimens made of high-strength concrete (above 40 MPa) and reinforcement (above SD490), containing 53 cruciform and 57 T-shape beam-column joint specimens,which were tested by Japanese researchers in the past 15 years. Test results were investigated for revising design recommendations of beam-column joints with high-strength reinforcement and concrete. Parametric study of the database showed that we could extend current ACI design rules for high-strength reinforcement with modified requirements of joint transverse reinforcement and development lengths. Based on available test data we conclude: (1) Yield story drifts of beam-column joint can be well estimated using Priestley’s formula; (2) Maximum tensile reinforcing ratio of a beam section should not exceed 0.025 and 1.5√(f_c^'' )/f_y in MPa to insure the beam yielding before joint shear failure; (3) The failure modes and failure points can be predicted by an empirical joint shear strength-ductility model with modification factors of bond and confining conditions. Provided information may be referred for updating the design recommendations of beam-column joints.
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Li, Luoman. "Further experiments on the seismic performance of structural concrete beam-column joints designed in accordance with the principles of damage avoidance : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering in Civil Engineering at the University of Canterbury /." 2006. http://library.canterbury.ac.nz/etd/adt-NZCU20060828.153252.
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Fu, F., and Dennis Lam. "Experimental study on semi-rigid composite joints with steel beams and precast hollowcore slabs." 2006. http://hdl.handle.net/10454/5798.
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The concept of semi-rigid composite connection has been widely researched in the past; however, most of the researches are limited to
composite joints with metal deck ¿ooring and solid concrete slabs. Composite construction incorporating precast concrete hollowcore slabs
(HCU) is a recently developed composite ¿oor system for buildings. The research on the structural behaviour of the semi-rigid composite joints
with HCU is new and without any previous experimental database. In this paper, eight full-scale tests of beam-to-column semi-rigid composite
joints with steel beams and precast hollowcore slabs are reported. The variables are stud spacing, degree of the shear connections, area of the
longitudinal reinforcement and slab thickness. The test set-up and instrumentation is described in detail. The experimental behaviour is analysed
and based on the test data the structural behaviour of these semi-rigid composite joints is discussed. Based on the experimental data, a simpli¿ed
method to predict rotation and moment capacity for this type of composite connection is proposed.
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Zhu, Peng. "Durability and Fatigue Behavior of CIP Concrete Connections for Accelerated Bridge Construction." 2010. http://trace.tennessee.edu/utk_graddiss/932.
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Continuous longitudinal and transverse U-bar joint connections between flanges of the decked bulb-Ts (DBTs) or between precast panels for accelerated bridge construction are investigated. The procedure for selecting durable closure pour (CP) materials for the connections is discussed firstly. The accelerated construction is quantified as two categories: overnight cure and 7-day cure of CP materials. Candidate materials are selected first based on literature review as well as tests of compressive strength and flow and workability. Then, performance criteria for selecting durable CP materials for both categories are developed based on durability tests of selected candidate materials. These durability tests include freezing-and-thawing durability, shrinkage, bond, and permeability tests. To investigate the longitudinal U-bar joint details, four pairs of full-scale slabs connected by a U-bar detail with one of the selected CP materials, overnight cure and 7-day cure, were tested. The loading demand necessary in the slab testing is determined based on the maximum forces in the longitudinal joint from an analytical parametric study. Static and fatigue tests under four-point flexural loading and three-point flexural-shear loading were conducted. Test results were evaluated based on flexural capacity, curvature behavior, cracking, deflection and steel strain. The transverse U-bar joint details are investigated to provide negative moment continuity in the multi-span bridges. Four full-scale specimens connected by a U-bar detail with one of the selected CP materials, overnight cure and 7-day cure, were tested. Static and fatigue tests under tension loading were conducted. The loading demand necessary in the beam testing is determined based on the maximum forces in the transverse joint from an analytical study. Test results were evaluated based on tension capacity, cracking, displacement and steel strain. Based on the test results, the developed longitudinal and transverse U-bar joint details are viable connection systems.
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Zhu, Zhenyu. "Joint construction and seismic performance of concrete-filled fiber reinforced polymer tubes." 2004. http://www.lib.ncsu.edu/theses/available/etd-11222004-165512/unrestricted/etd.pdf.
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Amorim, David Rodrigues Coelho. "Behaviour of ultra-high performance concrete as a joint-fill material for precast bridge deck panels subjected to negative bending." 2016. http://hdl.handle.net/1993/31018.
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This thesis investigates the behaviour of UHPC as a fill material for precast deck panels subjected to negative bending. Two full-scale test specimens were constructed. The transverse joints between the panels, the shear pockets, and the deck haunches were all filled with UHPC. A total of four tests were performed including two static tests to failure and two fatigue tests, one of which was performed to failure. Testing consisted of a loading apparatus acting upwards on the deck soffit in an attempt to impose tensile stresses across the transverse joints, representing the conditions that a transverse joint in the negative moment region of a continuous bridge deck would experience. It was concluded that the transverse UHPC joint performed satisfactorily by transferring bending stresses and shear stresses across the joint from one panel to the adjacent panel. Overall, the test specimens displayed performance levels expected from conventional cast-in-place concrete deck alternatives.February 2016
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Wang, Yu-Sheng, and 王昱升. "The Influence of Construction Cold Joint Existed between Slabs and Beams on the Seismic Behavior of Newly Reinforced Concrete T-beams." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/03374404912578730599.
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碩士國立中央大學
土木工程學系
101
The experimental study mainly focused on the influence of construction cold joints existed between slabs and beam webs on the seismic behavior of high strength reinforced concrete T-beams with screwed SD685 steel bars. Most of the interfacial shear stress of code specified empirical formula did not consider the seismic effect. The study will discuss the feasibility of the code and empirical formula when the RC structures are subjected to cyclic loading. The experimental results show, some premature cracks horizontal to beam direction were found in the T-shaped beam (a/d =5.46) with construction cold joint. In addition, more cracks generated in the neighborhood of the beam bar cut-off than the beam without beam bar cut-off. The results of high tensile steel T-beam interface shear stress analysis showed that, regardless of the member with or without cold joints, there is no impact on the seismic behavior.