Shear Failure of RC Dapped-End Beams

Aswin, M. and Mohammed, B.S. and Liew, M.S. and Syed, Z.I. (2015) Shear Failure of RC Dapped-End Beams. Advances in Materials Science and Engineering, 2015 .

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Reinforced concrete dapped-end beams (RC-DEBs) are mainly used for precast element construction. RC-DEBs generally are recessed at their end parts and supported by columns, cantilevers, inverted T-beams, or corbels. The geometric discontinuity of dapped-end beams evokes a severe stress concentration at reentrant corners that may lead to shear failure. Therefore, stress analysis is required at the reentrant vicinity for design requirement of these beams. Four large-scale RC-DEBs specimens were prepared, cast, and tested up to failure. Three parameters were investigated: amount of nib reinforcements, main flexural reinforcements, and concrete type at the dapped-end area. Finite element analysis using Vec2 was also conducted to predict the behavior of RC-DEBs. It has been found that highest stresses concentration factors occur at the reentrant corners and its vicinity. By using engineered cementitious composite (ECC) in the dapped-end area, the failure load has increased by 51.9, while the increment in the failure load was 62.2 and 46.7 as the amount of nib reinforcement and main flexural reinforcement increased, respectively. In addition, Vec2 analysis has been found to provide better accuracy for predicting the failure load of RC-DEBs compared to other analysis approaches. © 2015 Muhammad Aswin et al.

Item Type:Article
Impact Factor:cited By 18
Uncontrolled Keywords:Concretes; Finite element method; Reinforced concrete; Stress analysis, Analysis approach; Concentration factors; Engineered cementitious composite (ECC); Flexural reinforcement; Geometric discontinuities; Precast elements; Re-entrant corners; Three parameters, Concrete reinforcements
ID Code:26073
Deposited By: Ms Sharifah Fahimah Saiyed Yeop
Deposited On:30 Aug 2021 08:51
Last Modified:30 Aug 2021 08:51

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