空腔耗能剪力墙力学性能研究

Study on mechanical properties of cavity energy dissipation shear walls

为了降低结构自重并提高普通剪力墙的抗震性能,提出一种在普通剪力墙墙体中部开设贯通空腔并配置斜向耗能钢筋的空腔耗能剪力墙.使用有限元软件ABAQUS对空腔耗能剪力墙、空腔剪力墙和普通配筋剪力墙进行单调和往复加载数值模拟,对比分析3种剪力墙的力学性能.此外,在理论分析的基础上,提出空腔耗能剪力墙的水平极限承载力估算公式,并利用数值模拟的结果对其有效性进行验证.研究表明,与普通剪力墙相比,开设空腔能够改善剪力墙墙体的延性性能,但降低了剪力墙的刚度和承载力;空腔耗能剪力墙的位移延性系数较相同尺寸空腔剪力墙提高10%,耗能能力提高达1倍以上.空腔耗能剪力墙的水平极限承载力理论分析结果与模拟结果的误差在10%以内,可以满足实际工程的估算要求.

In order to reduce the structure weight and improve the seismic performance of conventional shear walls,a novel cavity energy dissipation shear wall was proposed,which was a shear wall with through cavity and oblique energy dissipation reinforcements arranged inside.Firstly,cavity energy dissipation shear wall,cavity shear wall and conventional reinforced shear wall were tested under static loadings and reserved loadings using finite element software ABAQUS.Then,comparative analysis of the three types of shear walls was carried out.Finally,the equations for estimating the horizontal ultimate bearing capacity of cavity energy dissipation shear wall were proposed based on the theoretical analysis.The research results indicate that,setting a cavity in the shear wall could improve the structural ductility performance of the shear wall.Compared with the conventional shear wall,the displacement ductility ratio of cavity energy dissipation shear wall could improve by 10%,and energy dissipation capacity of cavity energy dissipation shear wall was two times larger than those of the conventional shear wall.The errors between the theoretical and simulation results of the horizontal ultimate bearing capacity of cavity energy dissipation shear walls are within 10%,which could meet the requirement of engineering estimation.