Key Laboratory for Safety Control of Bridge Engineering, Ministry of Education and Hunan Province, Changsha University of Science & Technology, Changsha Hunan 410114, China
Shear Capacity of Reinforced Concrete Beam with Diagonal Reinforcement Based on Modified Compression Field Theory
WANG Lei, SUN Le-kun, MA Ya-fei, ZHANG Jian-ren, ZHANG Xu-hui, ZHANG Ya-sheng
Key Laboratory for Safety Control of Bridge Engineering, Ministry of Education and Hunan Province, Changsha University of Science & Technology, Changsha Hunan 410114, China
摘要For the compression-shear failure of a reinforced concrete bridge beam with diagonal reinforcement, the calculation of ultimate shear capacity is proposed based on the modified compression field theory (MCFT). Shear force is shared by the shear compression zone of concrete, stirrups, and diagonal reinforcements intersecting with diagonal cracks. The shear capacities of concrete in the tensile and compression areas are calculated. The new balance equation between the average stress and the internal force of cracked concrete is established, and the effects of diagonal reinforcement on the stress of diagonal cracks are considered. This procedure considers the constitutive relation conditions of materials and the deformation compatibility of concrete. The theoretical shear capacity predicted by MCFT is validated by the test results of two reinforced concrete beams, providing a reference for calculating the capacity of reinforced concrete beam.
Abstract：For the compression-shear failure of a reinforced concrete bridge beam with diagonal reinforcement, the calculation of ultimate shear capacity is proposed based on the modified compression field theory (MCFT). Shear force is shared by the shear compression zone of concrete, stirrups, and diagonal reinforcements intersecting with diagonal cracks. The shear capacities of concrete in the tensile and compression areas are calculated. The new balance equation between the average stress and the internal force of cracked concrete is established, and the effects of diagonal reinforcement on the stress of diagonal cracks are considered. This procedure considers the constitutive relation conditions of materials and the deformation compatibility of concrete. The theoretical shear capacity predicted by MCFT is validated by the test results of two reinforced concrete beams, providing a reference for calculating the capacity of reinforced concrete beam.
基金资助:Supported by the National Natural Science Foundation of China (No.50878031)
通讯作者:
WANG Lei, leiwlei@hotmail.com
E-mail: leiwlei@hotmail.com
引用本文:
王磊, 孙乐坤, 马亚飞, 张建仁, 张旭辉, 张亚圣. 基于MCFT理论的配斜筋RC梁抗剪承载力计算[J]. Journal of Highway and Transportation Research and Development, 2013, 7(3): 47-52.
WANG Lei, SUN Le-kun, MA Ya-fei, ZHANG Jian-ren, ZHANG Xu-hui, ZHANG Ya-sheng. Shear Capacity of Reinforced Concrete Beam with Diagonal Reinforcement Based on Modified Compression Field Theory. Journal of Highway and Transportation Research and Development, 2013, 7(3): 47-52.
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2013, Vol. 7 
