摘要
钢筋混凝土框架结构地震倒塌造成了大量人员伤亡和经济损失。采用基于MSC.Marc有限元软件开发的THUFIBER程序,以汶川地震中整体倒塌的北川县联社为研究对象,进行框架结构地震倒塌研究。通过动力时程分析得到结构在地震作用下的破坏表现为层失效模式,具体失效层为结构底部一、二层和上部通层。利用ATC-63推荐的22条地震记录对结构进行增量动力分析(incremental dynamic analysis,IDA),得到结构的抗倒塌储备系数约为4.4,结构发生完全倒塌时的平均最大层间位移角约为1/22。
The collapse of reinforced concrete frame structure in earthquake causes a large number of casualties and economic losses.The THUFIBER based on MSC.Marc finite element software was used to analyze the reinforced concrete frame structure of Beichuan Credit Union,which was completely collapsed during Wenchuan earthquake.The failure modes were found to be the lower and upper collapses modes by dynamic time history analysis.Incremental dynamic analysis was carried out by 22 earthquake records recommended by ATC-63.Results show that the Collapse Margin Ratio equals to 4.4,and the average maximum storey angle equals to 1/22.
作者
蔡晓光
胡媛馨
黄鑫
张宇东
CAI Xiao-guang;HU Yuan-xin;HUANG Xin;ZHANG Yu-dong(College of Geological Engineering,Institute of Disaster Prevebtion,Sanhe 065201,China;Key Laboratory of Building Collapse Mechanism and Disaster Prevention,China Earthquake Administration,Sanhe 065201,China)
出处
《科学技术与工程》
北大核心
2020年第8期3164-3169,共6页
Science Technology and Engineering
基金
中国地震局教师科研基金(20130108)
国家自然科学基金(51778144)。
关键词
汶川地震
钢筋混凝土框架结构
倒塌机理
数值模拟
增量动力分析
Wenchuan earthquake
reinforced concrete frame
collapse mechanism
numerical simulation
incremental dynamic analysis
