一种框架摇摆墙结构的实现形式及其有限元分析

Design and finite element analysis for a new frame-rocking wall structure

基于可更换构件理念,提出了一种框架摇摆墙结构的实现形式。在试验研究基础上,构建了4种不同节点形式的有限元模型,计算结果表明:延性连接件与摇摆墙和框架之间应采用刚接节点进行模拟,摇摆墙与基础之间的橡胶垫与抗剪键可采用铰接节点进行简化;随着连接件直径和摇摆墙厚度增加,框架摇摆墙层间位移更为均匀,结构承载力随之增加但增加幅度逐渐减小。实际工程中应首先结合结构抗震需求确定较为合理的摇摆墙厚度,而后再按该方法优化连接件直径和构造。

A type of practicable frame-rocking wall structures was proposed with the concept of replaceable members. Based on tests and studies,four kinds of finite element（ FE） models with different joint types were built to simulate frame-rocking wall structures. The FE calculation results showed that rigid a joints should be adopted between ductility connectors and a rocking wall or a frame,while rubbers and shear keys between a rocking wall and a base can be simplified into hinge joints; with increase in the diameter of ductility connectors and the thickness of a rocking wall,interstorey drifts of a frame-rocking wall structure become more uniform,the force-bearing capacity of the structure increases but the increasing level decreases gradually; at first,the reasonable thickness of a rocking wall should be determined to meet the aseismic requirements,then the diameter and configuration of ductility connectors can be optimized with the methods proposed here.