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要深入了解梁-墙平面外连接节点的受力性能,特别是发生“拉脱破坏”的原因,需要明确平面外弯矩在剪力墙临界截面上引起的弯矩和扭矩的传递比例。通过有限元计算,对影响剪力墙截面力分布和节点弯矩传递比例的主要因素,如梁、墙截面尺寸以及边界条件等进行了参数分析;在此基础上,利用简化模型推导了节点弯矩传递比例的理论计算公式,并进行了数值拟合;通过与分析结果和ACI无梁楼盖相关计算公式的对比发现,ACI公式明显低估了抗弯条带的弯矩传递比例。
It is necessary to know the reason of the stress behavior of out-of-plane connection nodes, especially the “pull-off failure”, and to determine the transfer ratio of bending moments and torques caused by out-of-plane moment in the critical section of shear wall . Through the finite element calculation, the main factors influencing the force distribution of the shear wall section and the moment transfer ratio of the node, such as the beam and wall section size and the boundary conditions were analyzed. Based on the above analysis, The theoretical calculation formula of moment transfer ratio and numerical simulation are compared. By comparing with the analysis results and the calculation formulas of ACI without beam floor, it is found that ACI formula underestimates moment transfer ratio of bending strip.