摘要
针对RC框架结构可修复能力不明确的问题,提出基于构件变形的RC框架结构可修复能力评估方法。研究以柱达到严重破坏作为结构拆除的判断准则,引入结构可修复能力储备系数来量化结构可修复能力。以结构动力失稳作为结构倒塌的判断准则,对按照我国规范GB50011-2010设计的48个RC框架结构分别进行增量动力分析;探讨柱分别达到严重破坏和结构倒塌状态下的层间位移角分布规律,包括最大层间位移角和残余层间位移角。发现柱达到严重破坏的残余层间位移角均值为1.48%,主要分布在0.5%~2.5%之间,且残余层间位移角超出0.5%时柱严重破坏的概率较高;柱达到严重破坏时最大层间位移角的数据离散性比不同残余层间位移角限值对应的数据离散性更小,且在基于残余层间位移角的拆除准则中可修复能力储备系数对残余层间位移角限值变化较为敏感,表明基于柱达到严重破坏的拆除准则比基于残余层间位移角的拆除准则更合理,可用于量化结构可修复能力。
In order to quantify repairability of RC frames,the repairability of RC frames using component-performancebased method is studied. Columns in severe damage are taken as demolition criterion,and repairability margin ratio is presented. Structure dynamic instability is adopted as collapse criterion. 48 RC frame structures are introduced according to the Chinese code, and incremental dynamic analysis is conducted for every structure. And the relationships are discussed among inter-story drift ratio,residual inter-story drift ratio,columns in severe damage and structure collapse. The mean value of residual inter-story drift ratio of column in severe damage is 1. 48%,and mainly distributed between 0. 5% and 2. 5%. Furthermore,the risk of column in severe damage is remarkable when residual inter-story drift ratio exceeds 0. 5%. The variable coefficient of demolition criterion based on column in severe damage is better than demolition criterion based on residual inter-story drift ratio. Moreover,the repairability margin ratio of demolition criterion based on residual inter-story drift ratio is sensitive to the variation of residual inter-story drift ratio. Results indicate that the method proposed in this paper is more reasonable and can quantify the repairability of RC frame.
作者
季静
乔升访
韩小雷
杨光
JI Jing;QIAO Shengfang;HAN Xiaolei;YANG Guang(College of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,China;State Key Laboratory of Subtropical Architecture Science,South China University of Technology,Guangzhou 510640,China;Guangzhou Institute of Building Science Co.,Ltd.,Guangzhou 510440,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2018年第S1期205-211,共7页
Journal of Building Structures
基金
国家自然科学基金项目(51378221)
广东省自然科学基金项目(2017A030313274
2017A030313306)
广州市科技计划项目(15020088)
关键词
RC框架结构
基于性能设计
易损性分析
增量动力分析
抗倒塌能力
残余变形
经济损失
RC frame
performance-based design
vulnerability analysis
incremental dynamic analysis
collapse resistant capacity
residual deformation
economic loss
