钢筋混凝土柱基于易损性曲线的地震损伤评估  

VULNERABILITY CURVES-BASED SEISMIC DAMAGE ASSESSMENT OF RC COLUMNS

作　　者：丁阳[1] 伍敏[1] 徐龙河[2] 李忠献[1] 

机构地区：[1]天津大学建筑工程学院/滨海土木工程结构与安全教育部重点实验室(天津大学),天津300072 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《工程力学》2012年第1期81-86,共6页Engineering Mechanics

基　　金：国家自然科学基金重大研究计划重点支持项目(90815025;90715032);国家自然科学基金青年科学基金项目(50808013);天津市应用基础与前沿技术研究计划重点项目(09JCZDJC25200)

摘　　要：为评估地震作用下结构构件的损伤程度,建立基于竖向剩余承载力的损伤指标,提出钢筋混凝土柱基于易损性曲线的地震损伤评估方法。该方法对钢筋混凝土柱采用精细化分析模型,避免单自由度体系假设,通过增量动力分析获得对数正态分布形式的易损性曲线,进行地震损伤程度评估。研究表明:所提出的地震损伤评估方法,计算简单,能有效评估钢筋混凝土柱在不同地震动强度指标下的损伤程度,为震后钢筋混凝土结构的安全评估和修复加固提供了理论依据。To evaluate the damage extent of structural members under earthquake, a method of vulnerability curves based seismic damage assessment for reinforced concrete columns is proposed, using the damage index which is based on the vertical residual capacity. By means of adopting the refined analysis model which avoids assuming RC column as the single-degree-freedom system, the vulnerability curves with lognormal distribution are constructed by incremental dynamic analysis for its damage assessment. It is demonstrated that the proposed method of damage assessment for reinforced concrete columns is simple in calculation as well as effective in evaluating the damage extent for different seismic intensity indices, and could provide theoretical evidence for safety evaluation and rehabilitation after earthquake.

关 键 词：钢筋混凝土柱 损伤评估 竖向剩余承载力 增量动力分析 易损性曲线 

分 类 号：TU352[建筑科学—结构工程] TU375.3