带可更换连梁的新型剪力墙仿真分析与试验验证

鉴于传统连梁在震时破坏后修复比较困难,近年来部分学者研究在连梁的跨中设置可更换耗能部件,使其在中震或大震时耗能,震后便于修复更换.本文基于ABAQUS有限元程序,建立一片带可更换连梁的大比例双肢剪力墙试件的精细有限元模型,阐述了其材料本构模型和建模过程,对其进行精细仿真分析.计算与试验结果均表明,可更换连梁能够将破坏位置集中在保险丝,而且模拟的初始刚度和峰值承载力与试验结果比较接近,模型可较好地预测试件各部分的屈服顺序,该模拟方法对类似联肢剪力墙结构的数值模拟具有较好的借鉴意义.

Detailed Simulation Analysis of Shear Wall Structures with Replaceable Coupling Beams and Experimental Verification

As it is difficult to repair the damaged conventional coupling beams, the concept of providing an energy dissipation fuse in a coupling beam has been developed and investigated over the past few years.The energy dissipation fuse is designed to dissipate seismic energy in moderate earthquakes or rare earthquakes, and can be replaced easily after the earthquake.Based on the ABAQUS procedure, a refined analytical model of large scale coupled shear wall specimen with replaceable coupling beams was established to conduct static push-over analysis.The material constitutive model and modeling approach were also introduced.By comparing the computational and experiment results, it can be found that the replaceable coupling beams can make the damage and energy dissipation concentrate in the replaceable fuse, and the simulation methods can precisely predict the initial stiffness and peak bearing capacity of the new shear wall.In addition, the simulation can well predict the yield sequence of shear wall specimen.It is hoped that the proposed simulation methods can be widely used to simulate similar shear wall structures in future.