配置不同纵筋中高剪跨比榫卯剪力墙抗震性能数值分析研究

Numerical study on seismic behavior of medium and high shear span ratio mortise and tenon shear wall with mortise-tenon joints and different longitudinal reinforcement

为满足装配式剪力墙结构整体性及其构件抗震性能的要求,提出了一种适用于装配式剪力墙结构中预制墙板间水平连接的榫卯接缝节点连接技术。本文通过ABAQUS建立中高剪跨比榫卯式剪力墙模型,模拟剪力墙在单调荷载作用下的基本力学性能,将数值模拟的结果与试验数据对比,结果表明:数值模型可以较好地模拟榫卯剪力墙的变形、裂缝发展和破坏形态;榫卯接缝连接性能良好,对墙体的整体性基本无影响;加载前期满足“等同现浇”的要求,峰值状态后,具有更好的延性和极限变形能力。在此基础上进行了变参数分析,对3片设置不同边缘构件纵筋配筋率的榫卯剪力墙进行数值模拟,结果表明:随着边缘构件纵筋配筋率的增加,边缘构件限制裂缝发展的能力提高,墙体的水平承载力和极限变形能力提高,受拉破坏区域减少、破坏程度降低。

In order to meet the requirements of the integrity of the prefabricated shear wall structure and the seismic performance of its components,a mortise and tenon joint joint connection technology suitable for horizontal connection between prefabricated wall panels in the prefabricated shear wall structure is proposed.This paper established a tenon mortise shear wall model with medium to high shear span ratio through ABAQUS,and simulates the basic mechanical properties of shear walls under monotonic loading.It compares the results of numerical simulation with experimental data,and the results indicate that:Numerical models can effectively simulate the deformation,crack development,and failure morphology of mortise and tenon shear walls.The connection performance of mortise and tenon joints is good,and it has little impact on the overall integrity of the wall.In the early stage of loading,the mortise and tenon shear wall meets the requirement of"equivalent cast-in-place",and after the peak state,it has better ductility and ultimate deformation capacity.On this basis,variable parameter analysis was conducted and numerical simulations were conducted on three mortise and tenon shear walls with different longitudinal reinforcement ratios of edge components.The results showed that:As the longitudinal reinforcement ratio of edge components increases,the ability of edge components to limit crack development increases,the horizontal bearing capacity and ultimate deformation capacity of walls increase,and the tensile failure area and degree of failure decrease.