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Relevant bibliographies by topics / Plain Concrete Beams

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Academic literature on the topic 'Plain Concrete Beams'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 September 2023

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Journal articles on the topic "Plain Concrete Beams"

1

Li, Jing, Lin Fu Wang, Juan Li, Xian Feng Qu, and Lin Jang. "Research on Flexural Behavior of Coarse Recycled Aggregate-Filled Plain Concrete Beam." Advanced Materials Research 250-253 (May 2011): 379–82. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.379.

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In order to study the flexural behavior of coarse recycled aggregate-filled plain concrete beams, two beams were made. The experiment of simply supported beam under concentrated loads is performed, which makes us get the ultimate flexural capacity, midspan deflection and the development of cracks of each beam, and the numerical simulation of the damage process of beams is also carried out using finite element software. The results indicated that the tension property of coarse recycled aggregate-filled plain concrete beam is better than ordinary concrete beam, and some failure forms of bending is similar; the strength of recycled aggregates greatly influences flexural behavior of coarse recycled aggregate-filled plain concrete beam.

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Qu, Hong Chang, Hong Yuan Li, and Xuan Zhang. "Flexural Tests of Fiber-Reinforced-Concrete Beams Reinforced with FRP Rebars." Applied Mechanics and Materials 166-169 (May 2012): 1797–800. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.1797.

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This paper investigates the flexural performance of FRP/FRC hybrid reinforcement system as well as FRP/plain concrete beams. Test results showed that the crack widths of FRP/FRC beams were smaller than those of FRP/plain concrete beams at the different corresponding load. With the increase of load, the crack spacing slightly decreased. The plain concrete beams failed in a more brittle mode than the FRC beams. Once they reached their ultimate moments, the load dropped fleetly. Compared to the companion beam, the addition of fibers improved the flexural behavior.

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Srinivas, K. "A Study on the Flexural Behavior of Plain Cement Concrete with Self Compaction Concrete." International Journal for Research in Applied Science and Engineering Technology 9, no. 12 (December 31, 2021): 441–47. http://dx.doi.org/10.22214/ijraset.2021.39330.

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Abstract: To study the flexural behaviour of plain cement concrete with self-compaction concrete using three point loading. We are using two different types of concrete (Plain Cement Concrete and Self Compaction Concrete). For this we are using M20 grade concrete. We cast cubes and beams of sizes 150x150x150mm and 150x150x700mm respectively.Based on the test results it is concluded that the flexural strength of the self-compaction concrete beams is more than the plain cement concrete beams. And in the combination also the flexural strength is more when the plain cement concrete layer is at the bottom while the selfcompaction concrete layer is at top.

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Qeshta, Ismail M. I., Payam Shafigh, Mohd Zamin Jumaat, Aziz Ibrahim Abdulla, Ubagaram Johnson Alengaram, and Zainah Ibrahim. "Flexural Behaviour of Concrete Beams Bonded with Wire Mesh-Epoxy Composite." Applied Mechanics and Materials 567 (June 2014): 411–16. http://dx.doi.org/10.4028/www.scientific.net/amm.567.411.

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This paper investigates the flexural performance of plain concrete beams bonded with wire mesh-epoxy composite. A total of four beam specimens were prepared and tested. Three specimens were bonded with same amount of wire mesh-epoxy composite with varying composite width and one plain concrete specimen was used as a control. The effect of wire mesh-epoxy composite on enhancing the flexural behaviour of concrete beams as well as the effect of different configurations of composite was studied. Test results showedthat the wire mesh-epoxy composite increased the flexural strength of concrete beams. The increase in energy absorption of bonded beams was remarkable. In addition, specimen with large composite width showed better behaviour with respect to energy absorption capability.

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Isa, MN. "FLEXURAL IMPROVEMENT OF PLAIN CONCRETE BEAMS STRENGTHENED WITH HIGH PERFORMANCE FIBRE REINFORCED CONCRETE." Nigerian Journal of Technology 36, no. 3 (June 30, 2017): 697–704. http://dx.doi.org/10.4314/njt.v36i3.6.

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Strengthening of concrete structures have become inevitable due to unavoidable factors such as fatigue and aggressive environmental conditions causing deterioration of concrete structures. Many researchers have turned in the direction of using various high strength and high performance concretes due to their high structural and durability properties, for the purpose of repair and strengthening of concrete structures against these aggressive conditions. As a result, this study carryout experimental, numerical and analytical investigation to study the behaviour of plain concrete (PC) beams strengthened with High Performance Fibre Reinforced Concrete (HPFRC) layer using three different jacketing configurations and tested in flexure. Results show significant improvement in both stiffness and load bearing capacity of plain concrete beams.Â http://dx.doi.org/10.4314/njt.v36i3.6

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Słowik, Marta. "Influence of tensile softening of concrete on crack development and failure in concrete and reinforced concrete beams." Bulletin of the Military University of Technology 68, no. 1 (March 29, 2019): 213–23. http://dx.doi.org/10.5604/01.3001.0013.1481.

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In the paper, the own test results were presented. The experimental investigation was focused at determining the cracking and load capacity of beams made of concrete. The beams were characterized by different longitudinal reinforcement ratio from zero — plain concrete beams, through low ratio 0.12% — slightly reinforced concrete beams, middle ratio 0.9% — typical reinforced concrete beams, up to the ratios 1.3% and 1.8% — higher reinforced concrete beams. On the basis of the performed experiments and the results of numerical calculations, the process of crack’s formation and crack’s development in plain concrete, slightly reinforced concrete and reinforced concrete beams with different reinforcement ratio was described. When discussing cracking process in the beams, the contribution of strain softening of tensile concrete in the microcracked zone on the character of beams’ failure was analysed as well. Keywords: civil engineering, concrete and reinforced concrete members, cracking and load capacity.

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Taj, Ali I., and Alaa H. Al-Zuhairi. "Behavior of Plain Concrete Beam Analyzed Using Extended Finite Element Method." Association of Arab Universities Journal of Engineering Sciences 26, no. 1 (March 31, 2019): 121–28. http://dx.doi.org/10.33261/jaaru.2019.26.1.016.

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In this study, plain concrete simply supported beams subjected to two points loading were analyzed for the flexure. The numerical model of the beam was constructed in the meso-scale representation of concrete as a two phasic material (aggregate, and mortar). The fracture process of the concrete beams under loading was investigated in the laboratory as well as by the numerical models. The Extended Finite Element Method (XFEM) was employed for the treatment of the discontinuities that appeared during the fracture process in concrete. Finite element method with the feature standard/explicitlywas utilized for the numerical analysis. Aggregate particles were assumedof elliptic shape. Other properties such as grading and sizes of the aggregate particles were taken from standard laboratory tests that conducted on aggregate samples.Two different concrete beamswere experimentally and numerically investigated. The difference between beams was concentrated in the maximum size of aggregate particles. The comparison between experimental and numerical results showed that themeso-scale model gives a good interface for the representing the concrete models in numerical approach. It was concluded that the XFEM is a powerful technique to use for the analysis of the fracture process and crack propagation in concrete.

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Alavizadeh-Farhang, Ali, and Johan Silfwerbrand. "Responses of Plain and Steel Fiber-Reinforced Concrete Beams to Temperature and Mechanical Loads: Experimental Study." Transportation Research Record: Journal of the Transportation Research Board 1740, no. 1 (January 2000): 25–32. http://dx.doi.org/10.3141/1740-04.

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To study the structural responses of plain and steel fiber-reinforced concrete pavements under combined mechanical and thermal loads, two test series have been conducted with plain and steel fiber-reinforced concrete beams. The magnitude and duration of the differences in the induced stresses caused by traffic load and a positive nonlinear temperature gradient (the top surface was warmer than the bottom surface during the day) may lead to some relaxation of thermal stresses and subsequently increase the load-carrying capacity. Considering the loss of support contact in the interior part of the concrete pavement, the experimental study of combined loading with restrained concrete beams may provide some insight and an indication of whether the superposition of stresses is a proper approach. The beams were subjected to solely thermal, solely mechanical, and combined thermal and mechanical loads while the rotation of the beam at supports was prevented. The results of tests conducted with both plain and steel fiber-reinforced beams showed that the superposition of stresses under combined loading before cracking gave a satisfactory estimation of the load-carrying capacities. The results also showed that the effect of relaxation of stresses due to short-term thermal loads was not noticeable in the load-carrying capacity achieved in tests with combined thermal and mechanical loads. On the contrary, a tendency for reduction of the load-carrying capacity was observed at higher thermal gradients. In addition, the overall structural responses of steel fiber-reinforced concrete beams under mechanical load and a nonlinear temperature gradient combined were similar to the responses of plain concrete beams up to the cracking stage. However, the release of thermal stresses due to cracking and the considerable residual load-carrying capacity after cracking were the most important observations for steel fiber-reinforced concrete beams.

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Kim, Chul-Goo, Hong-Gun Park, Geon-Ho Hong, and Su-Min Kang. "Shear Strength of Steel Fiber Concrete - Plain Concrete Composite Beams." Journal of the Korea Concrete Institute 27, no. 5 (October 30, 2015): 501–10. http://dx.doi.org/10.4334/jkci.2015.27.5.501.

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Al-Saidy, A. H. "Performance of Cement-Based Patch Repair Materials in Plain and Reinforced Concrete Members." Journal of Engineering Research [TJER] 13, no. 2 (December 1, 2016): 160. http://dx.doi.org/10.24200/tjer.vol13iss2pp160-171.

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Structural elements such as beams, slabs, and columns may require strengthening or repair during their service life. Different repair materials (RMs) are available and it is usually difficult to choose the best ones, especially when considering the cost of such materials. This paper presents the results of an experimental investigation of patch RMs on plain concrete prisms as well as on reinforced concrete beams. Three cement-based RMs available in the market with different mechanical properties and an ordinary Portland cement (OPC) mix produced in the lab were used in the study. Damage was induced in prisms/beams and then repaired using different materials. The experimental work included assessment of the flexural strength of damaged/repaired plain concrete prisms; slant shear (bond) strength between the concrete and the RM; axial strength of damaged/repaired plain concrete prisms and bond of the repair materials in damaged/repaired reinforced concrete beams loaded to failure. The test results showed that all RMs performed well in restoring the strength of damaged plain concrete. Compatibility of the RMs with substrate concrete was found to be more important in the behavior than superior mechanical properties of the RMs. No difference was noted in the behavior between the RMs in repairing reinforced concrete beams at the tension side.

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Dissertations / Theses on the topic "Plain Concrete Beams"

1

Guenther, Cristy Louise. "Evaluation of shear and diagonal tension in plain concrete." Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1400964851&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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Jewett, Jackson (Jackson Lee). "Design, fabrication, and testing of plain concrete beams using topology optimization." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/120634.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2018.
Cataloged from PDF version of thesis. Page 45 blank.
Includes bibliographical references (pages 43-44).
Topology optimization is a structural design tool that can autonomously generate efficient forms within a design domain by ascribing fabrication material to key locations of a structure while removing it from underutilized areas. It has been known to lead to new design solutions that outperform conventional low-weight designs. This has made topology optimization a popular design tool for a wide range of applications, but examples related to civil structures such as buildings, bridges, or infrastructure remain limited. This is partly because topology optimization is a free-form design technique, and often produces complex, nonlinear designs that would be difficult to fabricate on a buildings-scale. However, this tendency suggests that concrete could be an excellent building material for topology-optimized civil structures, since its initial liquid phase makes it highly formable, and it's low cost and high strength make it a ubiquitous construction material. Materially-specific topology optimization algorithms have been suggested to account for the anisotropic behavior of reinforced concrete, however they have focused on developing strut-and-tie models and improving the damage strength of the design. At current, the validity of these algorithms remains uncertain as no designs have yet been fabricated and tested. This thesis therefore presents tests of plain concrete members designed using two different topology optimization algorithms that make different assumptions about the fabrication material's behavior, and compares their performance. Although plain concrete is rarely used on a structural scale, these initial experiments were designed without reinforcement to more clearly observe how these design algorithms reckon with the complex behavior of concrete. It was found that an algorithm specifically programmed to optimize plain concrete designed specimens that failed at lower maximum forces than beams designed with an algorithm that was not materially specific. It is likely that this result is due to optimization output rounding that was necessary to produce manufacturable designs. The information obtained from these tests is intended to inform topology optimization algorithms of reinforced concrete in future research.
by Jackson Jewett.
M. Eng.

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Sicha, Jakub. "Statické řešení zastřešení nádrže." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409778.

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Výpustek, Libor. "Průzkum a hodnocení mostu na dálnici D2." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225738.

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This thesis deals with the exploration and evaluation of the existing bridge carried him on the highway D2. The work is divided into theoretical and practical parts. The theoretical part focuses on the technical surveys, diagnosis of building structures and some methods of investigation and testing of building structures. In the practical part the visual inspection and diagnosis of disorders of the highway bridge substructures ev. No. D2-058, to determine material characteristics substructure and evaluate the state of the bridge. In conclusion, the practical part of the recommendations for the design and method of repairing the bridge.

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Šusták, Miroslav. "Multifunkční centrum Hlinsko - příprava a realizace stavby." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226490.

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Diploma work Multifunction Centre Hlinsko - preparation and realization of the covers technological studies throughout the building. Diploma work proposes a temporal, financial and material resources. The work included construction budget, schedule of work, technical regulations for demolition, implementation and installation of reinforced concrete ceiling glulam beams. For each technological regulation is developed inspection and test plan. The work includes the project site equipment. Diploma work is based on the technical documents supplied by the designer. The work also includes specialty.

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Attar, Ahmed. "Le béton renforcé de fibres metalliques, matériau anisotrope et hétérogène : caractérisation et modélisation du comportement en traction uniaxiale." Cachan, Ecole normale supérieure, 1996. http://www.theses.fr/1996DENS0011.

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Les résultats des essais d'identification des paramètres de la loi de comportement en traction disponibles pour les bétons renforcés de fibres métalliques, ne peuvent généralement rendre compte de manière satisfaisante des capacités réelles du matériau. On cherche à apprécier la sensibilité des grandeurs caractéristiques de la loi de comportement (la résistance en traction f#t et l'énergie de post-fissuration g#f) aux facteurs relatifs a la constitution du corps d'épreuve et aux conditions expérimentales. En suivant la méthodologie des plans d'expériences qui permet d'adopter une démarche formelle dans la définition des essais et d'apprécier la confiance a accorder aux résultats expérimentaux, on définit un modèle rhéologique pour les réponses ainsi retenues. Huit facteurs ont été pris en compte. Certains aspects macroscopique du comportement, ne peuvent être expliques que par une analyse portée a l'échelle micro. Une attention particulière est consacrée à l'étude de l'hétérogénéité et l'anisotropie du matériau. Les modèles de comportement élaborés, sont introduits dans un code de calcul aux éléments finis qui a permis en mettant a profit la théorie de la fissure distribuée, d'apprécier l'apport des fibres sur le comportement global des poutres en flexion

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7

Renuka, Devi M. V. "Fracture Of Plain Concrete Beams Via Fractals." Thesis, 2006. https://etd.iisc.ac.in/handle/2005/600.

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The quantitative description of rough fracture surfaces of concrete has been an important challenge for many years. Looking at the fracture surface of a concrete specimen, one realizes that the self-affine geometry of crack faces results from the stochastic nature of the crack growth. This is due to the heterogeneous nature of concrete that makes the crack tortuous leading its way through weak bonds, voids, mortar and getting arrested on encountering a hard aggregate forming crack face bridges. These mechanisms contribute to the tendency of the crack to follow a tortuous path. The self-similarity contained in the tortuous fracture surface of concrete makes it an ideal candidate to be considered as a fractal. Further, the softening response itself has been treated as a singular fractal function by earlier investigators. The very process of cracking and microcracking, could be considered very close to the stick and slip process and therefore as a fractal. Therefore modeling a crack as a fractal and characterizing it by a fractal dimension have become the focus of research in recent years. Due to randomly distributed discontinuous flaws and high heterogeneity of the internal structure of concrete, mechanical properties also randomly vary. Under the effect of the same external force, the stress intensity factors to which different points in the concrete are subjected are different. Hence the microcracks induced by the external force are distributed discontinuously and randomly. Therefore in the present study the effect of the random nature of the microcracks in the fracture process zone of concrete is investigated using both fractal and probabilistic approach. The most probable fractal dimension of a network of micro cracks is obtained as a function of the branching angle ‘α’ of the microcracks, considered as a random variable. Further, an ensemble of cracks is synthetically generated using Monte Carlo technique imposing a constraint that the random deviations do not exceed the maximum size of the aggregate. Such tortuous cracks are analyzed by extending Fictitious Crack Model (FCM) proposed by Hillerborg et al [37]. A numerical study is carried out to examine the influence of certain important fracture parameters on the beam response of plain concrete beams. The contents of this thesis are organized in seven chapters with references at the end. Chapter-1 summarizes the historical development of fracture mechanics. A brief review of the basic concepts of fracture mechanics theory is presented. In chapter-2 a brief review of literature on fracture mechanics of concrete is presented. An overview of the analytical models, numerical models and fractal models till date has been presented in a systematic way. In chapter-3 the fracture processs zone has been modeled as a fractal following the work of Ji et al [118]. The contribution here has been to improve the work of Ji et al [118] (which considers the region of microcracks as a fractal tree) by considering the branching angle as a random variable. Mean fractal dimension thus obtained is found to match well with the experimental results available in the literature. In chapter-4 FCM, as proposed by Hillerborg et al [37] has been modified to be applicable to cracks with varying inclined faces by considering both horizontal and vertical components of the closing forces. The theoretical aspects of the modified FCM have been described in detail. The procedure for the determination of influence co- efficient matrices for a random tortuous crack in mode-I and mixed-mode along with a fractal crack has been explained. In the subsequent chapters the study has been taken up in two parts. In the first part only one generator of the fractal tree considered by Ji et al [118] has been analyzed by FCM to obtain load-deformation responses and fracture energy. In part two, a random tortuous crack, as already defined earlier has been analyzed both in mode-I and mixed mode using FCM. In chapter-5 plain concrete beams with one generator of fractal tree has been analyzed. The influence of the branching angle on the post-peak response of (P-δ) curves and fracture energy has been obtained. In chapter-6 a random tortuous crack has been analyzed in mode-I by FCM. The analysis reveals the influence of maximum aggregate size upon the pre and post-peak behaviour in support of the experimental findings. The nominal stress at peak is found to depend on the characteristic dimension of the structure thereby confirming the size effect. Further fracture energy values have been obtained by the work of fracture method and the results show good agreement with the results obtained in the literature. In chapter-7 a random tortuous crack has been analyzed in mixed mode by FCM. While modeling, symmetry has been assumed only to facilitate computational work though it is known that loss of symmetry affects the peak load. However analysis of the whole beam can be handled by the code developed in the thesis In chapter-8 a summary of the research work is presented along with a list of major observations and references at the end.

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8

Renuka, Devi M. V. "Fracture Of Plain Concrete Beams Via Fractals." Thesis, 2006. http://hdl.handle.net/2005/600.

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The quantitative description of rough fracture surfaces of concrete has been an important challenge for many years. Looking at the fracture surface of a concrete specimen, one realizes that the self-affine geometry of crack faces results from the stochastic nature of the crack growth. This is due to the heterogeneous nature of concrete that makes the crack tortuous leading its way through weak bonds, voids, mortar and getting arrested on encountering a hard aggregate forming crack face bridges. These mechanisms contribute to the tendency of the crack to follow a tortuous path. The self-similarity contained in the tortuous fracture surface of concrete makes it an ideal candidate to be considered as a fractal. Further, the softening response itself has been treated as a singular fractal function by earlier investigators. The very process of cracking and microcracking, could be considered very close to the stick and slip process and therefore as a fractal. Therefore modeling a crack as a fractal and characterizing it by a fractal dimension have become the focus of research in recent years. Due to randomly distributed discontinuous flaws and high heterogeneity of the internal structure of concrete, mechanical properties also randomly vary. Under the effect of the same external force, the stress intensity factors to which different points in the concrete are subjected are different. Hence the microcracks induced by the external force are distributed discontinuously and randomly. Therefore in the present study the effect of the random nature of the microcracks in the fracture process zone of concrete is investigated using both fractal and probabilistic approach. The most probable fractal dimension of a network of micro cracks is obtained as a function of the branching angle ‘α’ of the microcracks, considered as a random variable. Further, an ensemble of cracks is synthetically generated using Monte Carlo technique imposing a constraint that the random deviations do not exceed the maximum size of the aggregate. Such tortuous cracks are analyzed by extending Fictitious Crack Model (FCM) proposed by Hillerborg et al [37]. A numerical study is carried out to examine the influence of certain important fracture parameters on the beam response of plain concrete beams. The contents of this thesis are organized in seven chapters with references at the end. Chapter-1 summarizes the historical development of fracture mechanics. A brief review of the basic concepts of fracture mechanics theory is presented. In chapter-2 a brief review of literature on fracture mechanics of concrete is presented. An overview of the analytical models, numerical models and fractal models till date has been presented in a systematic way. In chapter-3 the fracture processs zone has been modeled as a fractal following the work of Ji et al [118]. The contribution here has been to improve the work of Ji et al [118] (which considers the region of microcracks as a fractal tree) by considering the branching angle as a random variable. Mean fractal dimension thus obtained is found to match well with the experimental results available in the literature. In chapter-4 FCM, as proposed by Hillerborg et al [37] has been modified to be applicable to cracks with varying inclined faces by considering both horizontal and vertical components of the closing forces. The theoretical aspects of the modified FCM have been described in detail. The procedure for the determination of influence co- efficient matrices for a random tortuous crack in mode-I and mixed-mode along with a fractal crack has been explained. In the subsequent chapters the study has been taken up in two parts. In the first part only one generator of the fractal tree considered by Ji et al [118] has been analyzed by FCM to obtain load-deformation responses and fracture energy. In part two, a random tortuous crack, as already defined earlier has been analyzed both in mode-I and mixed mode using FCM. In chapter-5 plain concrete beams with one generator of fractal tree has been analyzed. The influence of the branching angle on the post-peak response of (P-δ) curves and fracture energy has been obtained. In chapter-6 a random tortuous crack has been analyzed in mode-I by FCM. The analysis reveals the influence of maximum aggregate size upon the pre and post-peak behaviour in support of the experimental findings. The nominal stress at peak is found to depend on the characteristic dimension of the structure thereby confirming the size effect. Further fracture energy values have been obtained by the work of fracture method and the results show good agreement with the results obtained in the literature. In chapter-7 a random tortuous crack has been analyzed in mixed mode by FCM. While modeling, symmetry has been assumed only to facilitate computational work though it is known that loss of symmetry affects the peak load. However analysis of the whole beam can be handled by the code developed in the thesis In chapter-8 a summary of the research work is presented along with a list of major observations and references at the end.

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9

Kuan-Yu, Wu, and 吳光育. "Torsional Strength of Plain High-Strength Concrete Beams." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/58241856552406229060.

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碩士
國立臺灣科技大學
營建工程技術學系
83
The ultimate torsional strengths of plain concrete beams are currently calculated by the elastic theory, the plastic theory and the skew-bending theory. However, these theories are entirely based on tests of low-strength concrete beams. Therefore, it is necessary to examine the applicability of these theories when applied to plain high-strength concrete beams subject to pure torsion. In this study, twenty specimens were tested under pure torsion to investigate the effects on torsional strength of concrete strength ,specimen shape and specimen size. Tests results indicate that for high-strength concrete beams, the ultimate torsional strengths calculated using the elastic theory are quite reasonable for T- and L- beams , but overly conservative for rectangular beams. The plastic theory can reasonably predict the torsional strengths of smaller concrete beams. For larger beams , however , the plastic theory overestimates their torsional strengths. The torsional strengths predicted using the skew-bending theory in terms of concrete strength are quite reasonable for beams of T- and L- sections , but slightly conservative for smaller rectangular beams.

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10

Alexander, Mark Gavin. "Fracture of plain concrete: a comparative study of notched beams of varying depth." Thesis, 2014. http://hdl.handle.net/10539/15527.

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Books on the topic "Plain Concrete Beams"

1

Plain and fiber reinforced concrete beams under shear loading: Structural behavior and design aspects. Brescia, Italy: Starrylink Editrice, 2005.

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Book chapters on the topic "Plain Concrete Beams"

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Gao, Ri, Zhi Min Liu, Li Qian Zhang, and Piet Stroeven. "Static Properties of Plain Reactive Powder Concrete Beams." In Environmental Ecology and Technology of Concrete, 521–27. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-983-0.521.

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Banthia, N. P., Sidney Mindess, and Arnon Bentur. "Energy Balance in Instrumented Impact Tests on Plain Concrete Beams." In Fracture of Concrete and Rock, 26–36. New York, NY: Springer New York, 1989. http://dx.doi.org/10.1007/978-1-4612-3578-1_3.

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Mejía, C., and E. Lantsoght. "Strain and deflection analysis in plain concrete beams and reinforced concrete beams by applying digital image correlation." In Insights and Innovations in Structural Engineering, Mechanics and Computation, 1312–17. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315641645-215.

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Muralidhara, S., Hamid Eskandari, B. K. Raghu Prasad, and R. K. Singh. "b-value of plain concrete beams based on AE Quanta." In Experimental Mechanics on Emerging Energy Systems and Materials, Volume 5, 81–93. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-9798-2_11.

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Brake, Nicholas Andres, and Karim Chatti. "Characterizing Non-linear Fatigue Crack Growth and Size Effect in Plain Concrete Beams with a Hybrid Effective Crack and Cohesive Zone Model." In RILEM Bookseries, 185–92. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-024-0867-6_26.

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Pal, Biswajit, and Ananth Ramaswamy. "Meso-Scale Study of Plain Concrete Beam Under Both Ambient and High Temperature." In RILEM Bookseries, 153–62. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-76465-4_14.

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De Domenico, Dario, Giuseppe Quaranta, Qingcong Zeng, and Giorgio Monti. "Shear Capacity of RC Elements With Transverse Reinforcement Through a Variable-Angle Truss Model With Machine-Learning-Calibrated Coefficients." In Advances in Civil and Industrial Engineering, 163–80. IGI Global, 2023. http://dx.doi.org/10.4018/978-1-6684-5643-9.ch007.

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This chapter addresses the shear capacity prediction of reinforced concrete elements with transverse reinforcement through a hybrid approach in which a mechanical model (i.e., the variable-angle truss model incorporated in the Eurocode 2) is enhanced with two machine-learning-calibrated corrective coefficients aimed at improving the accuracy of the numerical predictions. Genetic programming is adopted to derive closed-form expressions of the corrective coefficients, thus making the proposed formulation suitable for design purposes and usable by practitioners. The model predictive performance and the improvements over alternative code-based formulations is demonstrated through a wide database of experimental results of reinforced concrete beams and columns with plain and hollow sections failing in shear under both monotonic and cyclic loading conditions. The proposed approach leads to numerical-to-experimental shear capacity ratios having mean value close to one and coefficients of variation equal to 32%, 28% and 24% for beams, columns with plain and hollow sections, respectively.

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Syroka-Korol, E., and J. Tejchman. "Parametric FE studies on a coupled energetic-statistical size effect in plain concrete beams under bending." In Computational Modelling of Concrete Structures, 487–94. CRC Press, 2014. http://dx.doi.org/10.1201/b16645-54.

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Anglin, Gary. "Concrete beams." In Introduction to Estimating, Plan Reading and Construction Techniques, 129–36. Routledge, 2019. http://dx.doi.org/10.1201/9780429264054-15.

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H. Patty, Agnes, Benedictus Sonny Yoedono, and Sunik Sunik. "A Study on Toughness Contribution to Structural Capacity of Reinforced Concrete Beam." In Reinforced Concrete Structures - Innovations in Materials, Design and Analysis [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.1001442.

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In principle, failure of concrete structures begins with the collapse of the material due to its inability to expand composite action between matrix and aggregates. Aggregate has the potential to function as reinforcement in plain concrete, while steel bars play the same role at higher levels, namely reinforced concrete. This study will raise the issue of how toughness due to bonding between steel bars and concrete material developing not only in the form of flexural capacity based on strength mechanics, but also in terms of fracture mechanics where flexural capacity is expressed as energy. It should be borne in mind that the energy quantity in this case consists of the energy consumed for the formation of the crack plane, and the energy dissipated as the crack propagates, until the magnitude of the failure moment is obtained as a final result. What is interesting about this book, is that almost all explanations of flexural behavior found in the field of strength mechanics, will be directly correlated with flexural behavior based on fracture mechanics concept. The flexural element used as simulation is a Mode I Fracture Reinforced Beam under RILEM and ASTM specification. The basic assumption is that the reinforcement is firmly embedded so that it is able to develop yield strength (fy), and the cracks proceed gradually. The beam dimensions meet the requirements for ductile failure instead of shear failure.

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Conference papers on the topic "Plain Concrete Beams"

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M H, Prashanth, Parvinder Singh, and Kishen Chandra. "Fatigue Crack Propagation in Plain Concrete Beams by Acoustic Emission Technique." In 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.069.

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Christy D, Lincy, T. M. Madhavan Pillai, and Praveen Nagarajan. "Crack Pattern of Plain Concrete Beams Using Applied Element Method." In Proceedings of the Advances in Technology, Engineering and Computing A Multinational Colloquium - 2017. Singapore: Research Publishing Services, 2017. http://dx.doi.org/10.3850/978-981-11-0744-3_c17-25.

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Issa, Camille A., Rita Awwad, and Anthony Sfeir. "Numerical Modeling of Plain Concrete Beams Strengthened with Externally Bonded CFRP." In International Conference on Computing in Civil Engineering 2005. Reston, VA: American Society of Civil Engineers, 2005. http://dx.doi.org/10.1061/40794(179)120.

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Korol, Ewelina, and Jacek Tejchman. "FE analysis of a coupled energetic-statistical size effect in plain concrete beams with varying material properties." In 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.137.

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Patil, Shilpa V., Rubina R. Mulla, and Bilavari S. Karkare. "Fracture Characterization of Plain and Reinforced Concrete Beams Using Acoustic Emission Technique." In 2017 International Conference on Sensing, Diagnostics, Prognostics and Control (SDPC). IEEE, 2017. http://dx.doi.org/10.1109/sdpc.2017.36.

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Al-Majidi, Mohammed Haloo, Andreas Lampropoulos, and Andrew B. Cundy. "Strengthening of plain concrete beams using Strain Hardening Geopolymer Composites (SHGC) layers." In IABSE Symposium, Vancouver 2017: Engineering the Future. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2017. http://dx.doi.org/10.2749/vancouver.2017.2715.

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Da Costa Santos, Ana Caroline, and Paul Archbold. "Mechanical Properties and Fracture Energy of Concrete Beams Reinforced with Basalt Fibres." In 4th International Conference on Bio-Based Building Materials. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/www.scientific.net/cta.1.316.

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Fibre-reinforced concrete (FRC) is widely employed in the construction industry, with assorted fibre types being used for different applications. Typically, steel fibres give additional tensile strength to the mixture, while flexible fibres may be used in large sections, such as floor slabs, to control crack width and to improve the handling ability of precast sections. For many reasons, including durability concerns, environmental impact, thermal performance, etc, alternatives to the currently available fibres are being sought. This study examines the potential of using basalt fibres, a mineral and natural material, as reinforcement of concrete sections in comparison to steel fibres and plain concrete mix. Mixes were tested containing 0.5% and 1.0% of basalt fibres measuring 25mm length, 0.5% of the same material with 48mm length and steel fibres measuring 50mm by 0.05%, 0.1%, 0.15% and 0.2% of the concrete volume. For the mechanical performance analysis, the 3-point bending test was led and the fracture energy, Young’s modulus and tensile strength in different moments of the tests were calculated. When compared to the control mixtures and the steel-fibre-reinforced concrete, the mixes containing basalt had a reduction in their elastic modulus, representing a decrease in the concrete brittleness. At the same time, the fracture energy of the mixtures was significantly increased with the basalt fibres in both lengths. Finally, the flexural strength was also higher for the natural fibre reinforced concrete than for the plain concrete and comparable to the results obtained with the addition of steel fibres by 0.15%.

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Neumann, Julia, Kristina Farwig, Rolf Breitenbücher, and Manfred Curbach. "Thin Concrete Overlays with Carbon Reinforcement." In 12th International Conference on Concrete Pavements. International Society for Concrete Pavements, 2021. http://dx.doi.org/10.33593/wpqei36n.

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In many countries like Germany, concrete pavements are normally built as Jointed Plain Concrete Pavements (JPCP). Due to a lack of alternatives, maintenance of concrete pavements usually requires a replacement of the whole pavement structure, which is labour- and resource-intensive. Therefore, new techniques like the application of thin concrete overlays as a partial repair of deteriorated concrete pavements have been developed. As a major disadvantage of such overlays, the existing joints in the retained concrete bottom-layer have to be transferred in the overlay in order to avoid reflection cracking. When using non-corrosive carbon-textile reinforcement in such concrete overlays, cracks might be distributed more finely, enabling jointless repairs while keeping a thin repair layer. In addition, the bond behaviour between the retained concrete and the applied concrete overlay as well as between the concrete overlay and the textile reinforcement is crucial for a successful repair. In this paper, the basic principles and feasibility of such a repair method are examined. On the one hand, the decisive influencing variables and parameters such as bond behaviour between the concrete layers and the cracking behaviour of the overlay are pointed out and discussed. On the other hand, the evaluated laboratory tests carried out are presented. These include large-scale beams built with an overlay on top of a retained concrete layer, which were subjected to cyclic flexural stress and to a subsequent detailed investigation of the bond behaviour and durability. Furthermore, the crack formation in the overlay was determined by means of tensile and flexural tensile strength tests.

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Pal, Biswajit, and Ananth Ramaswamy. "Meso-scale study of notched and un-notched plain concrete beam under three-point bending." In IABSE Congress, Christchurch 2021: Resilient technologies for sustainable infrastructure. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2021. http://dx.doi.org/10.2749/christchurch.2021.0890.

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<p>In this study, meso-scale (mm-cm scale) modelling approach is adopted to simulate the behaviour of plain concrete beam under 3-point bending. At meso-level, concrete is assumed as either a two- phase or a three-phase composite material (mortar, aggregate and/or interfacial transition zone- ITZ). In this tudy, first the aggregates are generated and placed in the concrete domain with prescribed randomness. The remaining space in the concrete domain is then filled with mortar. However, in three phase model, ITZ of finite thickness surrounding the aggregates is assumed to exist. In this study, three geometrically similar beam specimens with and without notch have been considered. The simulated load-crack mouth opening displacement (CMOD) is then validated with the corresponding experimental data. A convergence study of peak load with different specimens in terms of randomness in aggregates generation and placement has been studied.</p>

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S, Ajimi, Keerthy M. Simon, and Bharati Raj. "A Review on Residual Life Assessment of Plain and Reinforced Concrete Members." In International Web Conference in Civil Engineering for a Sustainable Planet. AIJR Publisher, 2021. http://dx.doi.org/10.21467/proceedings.112.33.

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Under fatigue loading, concrete like quasi-brittle materials exhibit softening behaviour since an inelastic zone will be formed in front of the crack tip called the fracture process zone (FPZ). There are various toughening mechanisms that exhibiting in this region. Current design practices for reinforced concrete assumes a zero tensile strength for concrete which is actually overly conservative. In fact, concrete can bear significant tensile stress and strain. Therefore, the tension softening response of RC member should consider in the study. Under fatigue loading, strength and stiffness decrease progressively according to the maximum amplitude and the number of cycles of loading. Fracture plays an important role in failure of normally and lightly reinforced beam. Since FPZ mechanisms and fibre bridging action resist crack propagation, we have to consider these mechanisms while assessing remaining life of RC member. Fatigue failure occurs when applied load is much less than the moment capacity. Such structures susceptible to fatigue load need to be monitored and residual life is to be predicted. This paper is presenting a review on the residual strength assessment on plain and reinforced concrete. The review includes the influence of various tension-softening models in predicting the residual life of plain and reinforced concrete. A comparative study is also conducted in order to assess the residual life by considering various tension softening laws.

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