基于多尺度模拟的网壳结构地震损伤过程分析  

Analysis on Seismic Damage Process of Reticulated Shell Structures Based on Multi-scale Modeling

作　　者：刘春芳 朱南海[1] 冯冲冲 贺小玲 LIU Chun-fang;ZHU Nan-hai;FENG Chong-chong;HE Xiao-ling(School of Architecture and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学建筑与测绘工程学院

出　　处：《科学技术与工程》2019年第24期306-312,共7页Science Technology and Engineering

基　　金：国家自然科学基金(51408276,51768024);江西省自然科学基金(20151BAB216023,20181BAB206039);江西省教育厅目(GJJ160618);江西理工大学青年英才支持计划资助

摘　　要：近年来突发事件作用下网壳结构的倒塌事故屡有发生,如何开展此类结构在地震作用下的抗倒塌机理研究已成为确保工程结构安全的重要课题之一。为研究地震作用下空间网格结构的倒塌过程及破坏行为,进而揭示结构的倒塌机理,以网壳结构为研究对象,基于结构多尺度模型,模拟网壳结构地震作用下损伤演化的全过程。计算结果表明:多尺度损伤模型能够兼顾结构整体上的线弹性响应和局部易损部位上的塑性损伤特征,从而更有效地模拟结构的损伤破坏过程。In recent years,collapse accidents of reticulated shell structures have repeatedly happened under the action of emergent events.How to carry out the research on the anti-collapse mechanism of this kind of structures under earthquake has become one of the important topics to ensure the safety of engineering structures.In order to investigate the collapse process and failure behavior of space grid structure under earthquake action and then reveal the collapse mechanism of the structure,the reticulated shell structure was taken as an object of study and an approach was made based on the structural multi-scale model.The whole process of damage evolution of the reticulated shell structure under the earthquake action was simulated.The calculation results show that the multi-scale damage model can take into account the linear elastic response of the whole structure and the plastic damage characteristics of the local vulnerable parts,so as to more effectively simulate the damage process of the structure.

关 键 词：多尺度模拟 倒塌分析 地震作用 损伤演化 网壳结构 

分 类 号：TU393[建筑科学—结构工程]