Effect of Development and Geometry on Behavior of Concrete Deep Beams

Rezaei, Nazanin; Klein, Gary; Garber, David

doi:10.14359/51713308

Cited by 6 publications

(9 citation statements)

References 3 publications

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“…• Introducing large web openings in the deep beam transforms it into an ordinary beam-column (Figure 2 • The load-deflection curve behaves semi-linearly, which shows that the deep beams act as ordinary beams more than as deep beams, as a result of the large web openings at the shear zone which change their geometry (Figure 3) [17].…”

Section: B Numerical Modelingmentioning

confidence: 99%

Prestressing Effects on Full Scale Deep Beams with Large Web Openings¨: An Experimental and Numerical Study

Abbas

Hussein

2022

Eng. Technol. Appl. Sci. Res.

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Most studies on deep beams have been made with reinforced concrete deep beams, only a few studies investigate the response of prestressed deep beams, while, to the best of our knowledge, there is not a study that investigates the response of full scale (T-section) prestressed deep beams with large web openings. An experimental and numerical study was conducted in order to investigate the shear strength of ordinary reinforced and partially prestressed full scale (T-section) deep beams that contain large web openings in order to investigate the prestressing existence effects on the deep beam responses and to better understand the effects of prestressing locations and opening depth to beam depth ratio on the deep beam performance and behavior. A total of seven deep beam specimens with identical shear span-to-depth ratio, compressive strength of concrete, and amount of horizontal and vertical web reinforcement ratios have been tested under mid-span concentrated load applied monotonically until failure. The main variables studied were the effects of depth of the web openings and the prestressing location on deep beam performance. The test results showed that the enlargement in the size of web openings substantially reduces the element’s shear capacities while prestressing strands location above the web openings has more effect at increasing the element’s shear capacities. The numerical study considered three-dimensional finite element models that have been developed in Abaqus software to simulate and predict the performance of prestressed deep beams. The results of numerical simulations were in good agreement with the experimental ones.

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Section: B Numerical Modelingmentioning

confidence: 99%

Prestressing Effects on Full Scale Deep Beams with Large Web Openings¨: An Experimental and Numerical Study

Abbas

Hussein

2022

Eng. Technol. Appl. Sci. Res.

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“…The study findings showed that the beams with the smallest strain energy predicted by the STM demonstrated lower crack widths and exhibited the best performance. Rezaei et al [11] carried out numerical and experimental research on the impact of the strut angle, development length, shape, and overhang length on the conduct of statically determinate concrete members with disturbed regions. Thirty-five simple deep beam specimens were tested and numerically modeled.…”

Section: Introductionmentioning

confidence: 99%

Effect of Support Conditions on Performance of Continuous Reinforced Concrete Deep Beams

2020

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While continuous reinforced concrete deep beams with fixed and hinged support conditions are every so often found in structures, little research has focused on their performance. This, in part, can be attributed to the demanding nature of ensuring fixed supports in experimentally testing such members. Nonetheless, conducting numerical analysis in comparison with experimental study has been a typical technique for producing a reliable numerical model as an alternative to destructive tests. This paper is aimed at numerically investigating the impact of different support conditions in the performance of two-span continuous reinforced concrete deep beams. A numerical model of three experimentally tested beams with two exterior rollers and interior hinge support conditions was generated. Good comparison, with an acceptable variation between numerical and experimental results, was achieved by tuning a few parameters in the numerical model, including element type, mesh size, and material constitutive relations. The refined numerical model was used as an alternative to destructive tests to conduct a parametric study to further investigate the impact of different sets of support conditions in the performance of two-span continuous reinforced concrete deep beams. This study highlights the potentially serious consequences of the support conditions in the performance of such deep beams.

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“…Concrete Deep Beams" (submitted to ACI Structural Journal ) [11]: The second paper is an extension of the first paper, including additional experimental results for one additional experimental specimens, the validation of numerical models, and results for numerical modeling of an additional 35 specimens. The specimens were modeled to investigate the effect of development length, development type, strut type, and strut angle on the behavior of nodal zones in discontinuity regions.…”

Section: • Chapter 5 -"Effect Of Development and Beam Geometry On Behmentioning

confidence: 99%

“…The limiting compressive stress of the node face (fcu) depends on the type of node (CCC, CCT, or CTT), the face where the nominal resistance is being found (bearing face, back face, or strut-to-node interface), the compressive strength of the concrete (f'c), and any confinement effects from surrounding concrete (accounted for through m), as shown in [2][3][4][5][6][7][8][9][10][11][12][13][14][15] Note that unlike ACI 318-14, AASHTO LRFD [19] does not account for the effect of stresses being able to spread along the length of struts or not being able to in members with constant cross-sectional areas along the length of struts.…”

Section: Aashto Lrfd Bridge Design Specification [19]mentioning

confidence: 99%

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Study on Strut and Node Behavior in Strut-and-Tie Modeling

Rezaei¹

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David Garber, who always stood by my side in this difficult path, and helped me with his well-thought-out advices. Without his support, valuable guidance, contribution, and patience, this dissertation would not have been possible. I would like to thank Gary Klein, one of the most knowledgeable and well-known civil engineers especially in strut-and-tie field, for his valuable advice, and crucial contribution, which made him a backbone of this dissertation. His truly scientific intuition, ideas and passions in science has inspired and nourished my intellectual maturity.

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Effect of Development and Geometry on Behavior of Concrete Deep Beams

Cited by 6 publications

References 3 publications

Prestressing Effects on Full Scale Deep Beams with Large Web Openings¨: An Experimental and Numerical Study

Prestressing Effects on Full Scale Deep Beams with Large Web Openings¨: An Experimental and Numerical Study

Effect of Support Conditions on Performance of Continuous Reinforced Concrete Deep Beams

Study on Strut and Node Behavior in Strut-and-Tie Modeling

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