承受异号弯矩的混凝土梁抗剪性能分析

Analysis of shear behavior of concrete beam bearing opposite-sign moment

研究了承受异号弯矩混凝土梁的剪切破坏形态和特点以及与简支梁相比在抗剪承载力上的区别,并以某三跨连续刚构桥为例,通过建立边跨弯矩变号段有限元模型,对该段抗剪性能进行分析,得到相应结构安全系数、应力分布规律和截面破坏形态。

The shear failure modes of concrete beam bearing Opposite-sign bending moment and differences in shearing strength from simple supported beams are analyzed. With reference to a three-span continuous rigid-flame bridge, the non-linear finite dement analysis method is used to create solid element model for segments close to side span moment number-changing area, and the structure safety coefficients, laws of stress distribution and failure modes of the sections are obtained.