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[1]易伟建,黄义谋.RC框架子结构连续倒塌动力响应分析[J].建筑科学与工程学报,2020,37(03):1-9.[doi:10.19815/j.jace.2019.05028]
　YI Wei-jian,HUANG Yi-mou.Analysis of Dynamic Response of Progressive Collapse for RC Frame Substructure[J].Journal of Architecture and Civil Engineering,2020,37(03):1-9.[doi:10.19815/j.jace.2019.05028]
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RC框架子结构连续倒塌动力响应分析(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
37卷
期数:
2020年03期
页码:
1-9
栏目:
出版日期:
2020-05-30

文章信息/Info

Title:
Analysis of Dynamic Response of Progressive Collapse for RC Frame Substructure
文章编号:
1673-2049(2020)03-0001-09
作者:
易伟建,黄义谋
(湖南大学 土木工程学院,湖南 长沙 410082)
Author(s):
YI Wei-jian, HUANG Yi-mou
(College of Civil Engineering, Hunan University, Changsha 410082, Hunan, China)
关键词:
连续倒塌;  中柱快速移除;  失效时间;  梁上荷载;  动力放大系数
Keywords:
progressive collapse;  rapid removal of middle column;  failure time;  load on beam;  dynamic increase factor
分类号:
TU973.2
DOI:
10.19815/j.jace.2019.05028
文献标志码:
A
摘要:
采用ABAQUS有限元软件的Explicit和Standard模块分别对RC梁柱子结构中柱失效的动力试验和静力试验进行了数值模拟,验证了模型的正确性,并在原动力试验的基础上做了进一步的计算,分析了中柱失效时间和梁上荷载值对剩余结构动力响应的影响。为得到该动力试验试件在不同静力荷载下的中柱位移,对该试件采用静力方式进行了加载,通过动力位移与静力位移的比值得到动力放大系数,随后讨论了失效时间和荷载大小对动力放大系数的影响。结果表明:失效时间越短,中柱的最大竖向位移和振幅越大,且动力放大系数随着失效时间的增大而减小; 梁上荷载越大,中柱节点的最大竖向位移越大,当荷载大于某一临界值时,位移将随时间持续发散增长,该临界点的荷载值可称作剩余结构的动态极限承载力; 剩余结构的动态极限承载力随着中柱失效时间的增大有所增加; 梁上荷载对动力放大系数值影响较小。
Abstract:
Numerical simulation analyses for dynamic test and static test of reinforced concrete beam-column substructures were conducted using Explicit and Standard modules of ABAQUS finite element software, respectively, and the correctness of the model was verified. Then, based on the original dynamic test, further calculations were carried out to analyze the influence of failure time of middle column and load on beam on the dynamic response of the residual structure. In order to obtain the displacement of middle column under different static loads, the dynamic test specimen was also loaded with static load, so the dynamic increase factor could be obtained, which equaled to the ratio of dynamic displacement to static displacement, then the effect of failure time and load value on the dynamic increase factor was discussed. The results show that when the failure time gets shorter, the maximum vertical displacement and amplitude of middle column will get larger; the dynamic increase factor decreases with increase of failure time. The maximum displacement of middle column increases as the load on beam increases, when the load exceeds a certain value, the displacement will continue to divergence with time, this critical load can be called dynamic ultimate bearing capacity of the residual structure, according to analysis, the ultimate bearing capacity of the residual structure increases with the increase of failure time of middle column; the load on beam has little influence on dynamic increase factor.

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备注/Memo

备注/Memo:
收稿日期:2019-06-14
基金项目:国家自然科学基金项目(51338004)
作者简介:易伟建(1954-),男,湖南长沙人,教授,博士研究生导师,工学博士,E-mail:wjyi@hnu.edu.cn。
更新日期/Last Update: 2020-06-08