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Shear Failure of RC Dapped-End Beams

., Muhammad Aswin, Bashar S Mohammed, Mohammad Shahir Liew, Zubair (2015) Shear Failure of RC Dapped-End Beams. Shear Failure of RC Dapped-End Beams . (Submitted)

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Abstract

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.

Item Type:Article
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Academic Subject One:Academic Department - Civil Engineering - Water and environment - Water
Departments / MOR / COE:Departments > Civil Engineering
ID Code:12089
Deposited By: Ahmad Suhairi
Deposited On:06 Apr 2017 02:28
Last Modified:06 Apr 2017 02:28

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