基于构件性能的掉层框架结构抗倒塌能力评估方法研究  

Different component-performance-based measures on evaluating collapse capacity for split-foundation frame

作　　者：刘流[1] 姬淑艳[2,3] 李英民[1,2] LIU Liu;JI Shuyan;LI Yingmin(School of Civil Engineering,Chongqing University,Chongqing 400045,China;Key Laboratory of New Technology for Construction of Cities in Mountain Area,Ministry of Education,Chongqing University,Chongqing 400045,China;School of Construction Management and Real Estate,Chongqing University,Chongqing 400045,China)

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045 [3]重庆大学建设管理与房地产学院,重庆400045

出　　处：《中南大学学报（自然科学版）》2021年第5期1610-1620,共11页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51638002,51878101)。

摘　　要：归纳3种典型的基于构件性能的结构倒塌评判准则,基于结构动力失稳倒塌判定准则,定量分析不同倒塌判定准则的合理性及对确定掉层框架结构抗倒塌能力的影响。研究结果表明:掉层框架结构具有损伤集中于局部构件的特点,基于Park-Ang损伤模型的加权平均法有低估掉层结构的抗倒塌能力的趋势,不宜直接作为掉层结构倒塌判定准则;掉层框架结构存在发生柱剪切失效的风险,对掉层结构进行倒塌易损性分析时,可采用基于割集理论的失效模式方法偏保守地确定结构的抗倒塌能力。Three typical component-performance-based collapse evaluation criteria and the dynamic instability criteria were summarized,and the applicability and effect of the collapse criteria were implemented quantitatively.The results show that the weighted average method based on Park-Ang damage model underestimate the collapse resistance of split-foundation frame,because of the concentrated partial damage,and the method should not be used as the collapse criterion of the structures directly.The risk of shear failure would occur on the splitfoundation frame,and the typical failure modes method based on cut-set is suggested for prudence.

关 键 词：掉层框架结构 基于构件性能 倒塌判定准则 增量动力分析 倒塌储备系数 

分 类 号：TU375[建筑科学—结构工程] P315.9[天文地球—地震学]