摘要
为合理确定地震受损钢筋混凝土结构数值分析模型,根据47个钢筋混凝土压弯构件在低周往复加载损伤试验条件下获得的滞回曲线数据结果,采用Park-Ang损伤指数计算公式,计算损伤构件不同损伤状态点对应的损伤指数值,并通过数据回归分析建立损伤构件刚度退化系数和强度退化系数与构件损伤指数值之间的拟合关系式;给出考虑地震损伤的损伤构件恢复力模型确定方法;通过数值算例对比分析结构地震损伤前后抗震性能的差异。分析结果表明:通过震害表现能够快速确定构件基于表观损伤状态的地震损伤分析模型,为震损结构的抗震性能评估提供依据。
In order to reasonable ascertain the analysis model of earthquake damaged structure. The hysteresis curve data of 47 compression-flexure concrete columns were selected in the study, and the damage index values corresponding to different damage status of each damaged concrete column were calculated using the Park-Ang damage index calculation formula. Through regression analysis, the fitting relations between stiffness degradation coefficient(strength degradation coefficient) and damage index values of damaged members were obtained. The restoring force model of damaged members considering seismic damage was established in this paper. At last, the differences of seismic performances of structure before and after the earthquake damage were analyzed. The analysis indicates that numerical analysis models of earthquake damaged structures can be quickly determined through the apparent damage status, and it provides a basis for seismic performance evaluation of seismic damaged structures.
出处
《土木工程学报》
EI
CSCD
北大核心
2014年第S2期280-285,共6页
China Civil Engineering Journal
基金
武汉工程大学科学研究基金(K201474)
关键词
震损结构
恢复力模型
损伤指数
退化系数
earthquake damaged structures
restoring force model
damage index
degradation coefficient
