地铁车辆段上盖全框支剪力墙结构抗震性能的非线性分析

Nonlinear analysis of seismic performance of fully frame-supported shear wall structures on depots

对深圳地区151m高地铁车辆段上盖混凝土全框支剪力墙结构采用双标量混凝土弹塑性损伤本构关系建立ABAQUS有限元模型,基于损伤力学理论,分别对结构底部框支框架和上部塔楼进行大震作用下的非线性分析,结果表明:地震作用结束后,结构损伤在安全范围内,采用的全框支剪力墙结构体系抗震性能较好;上部塔楼剪力墙先于底部框支柱出现损伤,且损伤程度大于框支柱,符合全框支转换结构预期的屈服机制;底部框支柱受压损伤小,最大受压损伤因子仅为0.24,框支框架弹塑性层间位移角远小于规范要求的1/120,表明在150m建筑高度范围内采用钢筋混凝土柱可达到预期抗震性能目标。

The ABAQUS finite element model was established for the 151m-high subway depot in Shenzhen using the double-scalar concrete elastic-plastic damage constitutive relation.The nonlinear analysis under the action of the large earthquake is carried out,and the results show that:after the earthquake action is over,the structural damage is within the safe range,and the seismic performance of the fully frame-supported shear wall structure system adopted in this paper is better;The pillars are damaged,and the damage degree is greater than that of the frame pillars,which is in line with the expected yield mechanism of the full-frame-supported conversion structure;the compressive damage of the bottom frame pillars is small,the maximum compressive damage factor is only 0.24,and the elastic-plastic interlayer displacement angle of the frame-supported frame is much less than 1/120 of the requirements of the specification,indicating that the use of reinforced concrete columns within the building height range of 150m can achieve the expected seismic performance target.