装配式竖向接缝剪力墙抗震性能数值模拟研究

Numerical Simulation of Seismic Performance of Prefabricated Vertical Joint Shear Walls

为分析竖向接缝对剪力结构抗震效果的影响,文中建立了不同装配式结构竖向接缝剪力墙的虚拟仿真模型,并验证模型的准确性,分析竖向接缝剪力墙的骨架曲线以及墙底截面钢筋的应力分布。结果表明,相同位移条件下,三种装配式竖向接缝剪力墙荷载水平的排序为试件1弱连接+强墙肢<试件2弱连接+强墙肢+锚固板<试件3凹口处锚固板伸入剪力墙,即凹口处锚固板伸入剪力墙的结构形式具有更强的承载特性;凹口处锚固板伸入剪力墙的结构形式延展性较弱,弱连接+强墙肢式剪力墙具有更强的延展性。相同的条件下,试件3凹口处锚固板伸入剪力墙的应变最大。

In order to analyze the effect of vertical joints on the seismic performance of shear structures,virtual simulation models of vertical joint shear walls of different prefabricated structures were established and the accuracy of the models was verified.The skeleton curve of vertical joint shear walls and the stress distribution of reinforcement bars at the bottom section of the walls were analyzed.The results show that under the same displacement conditions,the order of load levels of the three prefabricated vertical joint shear walls is as follows:specimen 1 with weak connection+strong wall limb<specimen 2 with weak connection+strong wall limb+anchor plate<specimen 3 with anchor plate extending into the shear wall at the notch,that is,the structural type with anchor plate extending into the shear wall at the notch has stronger bearing characteristics.The structural type of shear wall with anchorage plate extending into the concave has weak ductility,and the type of shear wall with weak connection and strong limb has stronger ductility.Under the same conditions,the maximum strain of the anchorage plate extending into the shear wall at the notch of specimen 3 is the largest.