Size Effect on Shear Strength of Deep Beams: Investigating with Strut-and-Tie Model

Tan, Kang Hai; Cheng, G. H.

doi:10.1061/(asce)0733-9445(2006)132:5(673)

Cited by 66 publications

(47 citation statements)

References 9 publications

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“…2, but its applicability to large-scale short or deep beams with and without shear reinforcement has been less examined although advanced studies have been conducted with experiments (An et al 1997;Tan and Cheng 2006;Walraven 2007). As a valuable experiment for the large short beam was recently reported by Collins et al (2015), the simulation was conducted for experimental verification as shown in Fig.…”

Section: Scheme Of Time-dependent Simulationmentioning

confidence: 99%

Time-Dependent Capacity of Large Scale Deep Beams under Sus-tained Loads

Bugalia

Maekawa

2017

ACT

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The aim of this study is to investigate the effect of sustained loads on the capacity of large-scale deep beams as a part of underground reinforced concrete, and to conduct parametric studies by numerical methods. The reduced shear capacity under long-term sustained loads is investigated to be associated with the mode of failure, and the higher timedependency is numerically suggested for deep-beams irrespective of their gain in the short-term static capacity. The main source of the possible decay of shear capacity is analyzed to originate from the creep damage of diagonal compression strut over the web concrete, and a simple expression of the strut-tie analogy is extended to the creep shear rupture of deep beams. Finally, it is concluded that the design safety factor of 1.2~1.3 for shear is appropriate for avoiding the risk of creep failure against long-term sustained loads of about 100 years.

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Section: Scheme Of Time-dependent Simulationmentioning

confidence: 99%

Time-Dependent Capacity of Large Scale Deep Beams under Sus-tained Loads

Bugalia

Maekawa

2017

ACT

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“…They concluded that size effect is successfully represented in the modified effectiveness factor as the capacity of continuous deep beams with different section depths was accurately predicted. On the other hand, Tan and Cheng [15] suggested that size effect depends on factors such as the geometry of strut (width and length) and strut boundary conditions due to transverse web reinforcement (spacing and diameter). They proposed a modified strut and tie model that accurately predicts the size effect trends for deep beams, with a uniform safety margin for different member sizes considered.…”

Section: Effectiveness Factor Of Concretementioning

confidence: 99%

Application of plasticity theory to reinforced concrete deep beams: a review

Ashour

Yang

2008

Magazine of Concrete Research

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This paper reviews the application of the plasticity theory to reinforced concrete deep beams. Both the truss analogy and mechanism approach were employed to predict the capacity of reinforced concrete deep beams. In addition, most current codes of practice, for example Eurocode 1992 and ACI 318-05, recommend the strut-and-tie model for designing reinforced concrete deep beams. Compared with methods based on empirical or semi-empirical equations, the strut-and-tie model and mechanism analyses are more rational, adequately accurate and sufficiently simple for estimating the load capacity of reinforced concrete deep beams. However, there is a problem of selecting the effectiveness factor of concrete as reflected in the wide range of values reported in the literature for deep beams.

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“…The crack band theory-based STM proposed in the present study identifies the shear transfer mechanisms of concrete struts and reinforcing bars considering size effect. This study also examines the applicability of STMs recommended by ACI 318-05 3 , EC 2 9 , and Tan and Cheng 13 using an extensive database of deep beams.…”

Section: Research Significancementioning

confidence: 99%

“…Tan and Cheng 13 also showed that size effect has to be considered in the effective strength of concrete struts to reasonably evaluate the shear capacity of deep beams with large sections.…”

Section: Introductionmentioning

confidence: 99%