竖向收进钢束筒结构楼层地震损伤评估研究  

Earthquake damage assessment study of floors in vertical setback steel bundled-tube structure

作　　者：郝勇[1] 陈丰 杜春晖[1] 丁秋雨 雷浩 胡鹏程 Hao Yong;Chen Feng;Du Chunhui;Ding Qiuyu;Lei Hao;Hu Pengcheng(Hebei University of Architecture,Zhangjiakou 075000,China)

机构地区：[1]河北建筑工程学院,河北张家口075000

出　　处：《建筑科学》2024年第1期154-163,共10页Building Science

基　　金：河北省教育厅基本科研业务费优秀创新团队项目(2022CXTD02);河北建筑工程学院博士科研启动基金(B-201808);河北建筑工程学院研究生创新基金项目(XY202205、XY202107)。

摘　　要：为定量评估钢束筒结构地震后楼层的损伤情况,基于算例分析模型,采用有限元分析软件对两类不同竖向收进方式的3种钢束筒结构进行大震弹塑性时程分析。通过楼层的变形与能量分析,基于归一化的位移和塑性耗能双参数破坏模型,研究给出确定钢束筒结构地震下楼层损伤程度指标——楼层损伤因子计算公式,通过计算得到的楼层损伤程度与基于损伤现象确定的楼层损伤程度基本吻合,该计算公式可用于成束钢框筒结构楼层地震损伤程度的定量评估。钢束筒结构楼层通过灰色关联-逐步分析耦合模型评估的地震损伤程度与基于损伤现象确定的地震损伤程度一致,表明基于灰色关联-逐步分析耦合模型的楼层损伤程度评估方法可以准确地对楼层的地震损伤情况进行评估。To quantitatively evaluate the damage condition of floors in steel bundled-tube structures after earthquakes,the elastic-plastic time-history analysis on three kinds of steel bundled-tube structure with two different vertical setback methods under rare earthquakes is carried out by using finite element analysis software based on the example analysis models.Through the deformation and energy analysis of the floor,based on the normalized displacement and plastic energy dissipation dual-parameter failure model,the calculation formula of the floor damage factor is given,which is the index to determine the damage degree of floors in the steel bundled-tube structure under earthquakes.The degree of floor damage determined by the floor damage factor is basically consistent with the degree of floor damage determined based on the damage phenomenon,therefore the calculation formula can be used to quantitatively evaluate the seismic damage degree of the floors of the bundled steel frame tube structure.The evaluation of the floor seismic damage degree of the bundled-tube structure evaluated by the coupled grey correlation-stepwise analysis model is consistent with the seismic damage degree determined based on the damage phenomenon,which indicates that the floor damage degree evaluation method based on the coupled grey correlation-stepwise analysis model can accurately evaluate the seismic damage condition of the floor.

关 键 词：钢束筒结构 楼层损伤评估 弹塑性时程分析 双参数损伤模型 

分 类 号：TU973.17[建筑科学—结构工程] TU311.41