钢筋混凝土框架结构地震损伤分析模型确定方法
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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.
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.
引文
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[4]陆新征,叶列平,缪志伟.建筑抗震弹塑性分析——原理、模型与在abaqus,msc.marc和sap2000上的实践[M].北京:中国建筑工业出版社,2009
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[8]张宇,李宏男,李钢.考虑钢筋锈蚀的震损结构抗震性能评估[J].建筑科学与工程学报,2011,28(4):97-105(Zhang Yu,Li Hongnan,Li Gang.Seismic performance evaluation of earthquake damaged structures considering rebar corrosion[J].Journal of Architecture and Civil Engineering,2011,28(4):97-105(in Chinese))
[9]Krawinkler H.Importance of good nonlinear analysis[J].The Structural Design of Tall and Special Buildings,2006,15(5):515-531
[10]周小龙.震损钢筋混凝土框架结构抗震性能评估方法研究[D].重庆:重庆大学,2014(Zhou Xiaolong.Research on seismic performance evaluation method of earthquake damaged RC frame structures[D].Chongqing:Chongqing University,2014(in Chinese))
[2]刘哲锋,陈蔚,陈逵.基于耗能历程等效的rc框架地震损伤评价[J].土木工程学报,2013,46(增2):32-38(Liu Zhefeng,Chen Wei,Chen Kui.Energy dissipation historybased seismic damage evaluation of reinforced concrete frames[J].China Civil Engineering Journal,2013,46(S2):32-38(in Chinese))
[3]于琦,孟少平,吴京.基于变形与能量双重准则的钢筋混凝土结构地震损伤评估[J].土木工程学报,2011,44(5):16-23(Yu Qi,Meng Shaoping,Wu Jing.Deformation and energy-based seismic damage evaluation of reinforced concrete structures[J].China Civil Engineering Journal,2011,44(5):16-23(in Chinese)).
[4]陆新征,叶列平,缪志伟.建筑抗震弹塑性分析——原理、模型与在abaqus,msc.marc和sap2000上的实践[M].北京:中国建筑工业出版社,2009
[5]欧进萍,吴波.有损伤压弯构件的恢复力试验研究及其应用[J].建筑结构学报,1995,16(6):21-29(Ou Jinping,Wu Bo.Experimental research on restoring force of damaged compresson-flexure members and its applications[J].Journal of Building Structures,1995,16(6):21-29(in Chinese))
[6]陈林之.钢筋混凝土框架结构基于性能的地震损伤控制研究[D].上海:同济大学,2010(Chen Linzhi.Study on performance based seismic damage control of reinforce concrete frame structures[D].Shanghai:Tongji University,2010(in Chinese))
[7]Park Y,Ang A H.Mechanistic seismic damage model for reinforced concrete[J].Journal of Structural Engineering,1985,111(4):722-739
[8]张宇,李宏男,李钢.考虑钢筋锈蚀的震损结构抗震性能评估[J].建筑科学与工程学报,2011,28(4):97-105(Zhang Yu,Li Hongnan,Li Gang.Seismic performance evaluation of earthquake damaged structures considering rebar corrosion[J].Journal of Architecture and Civil Engineering,2011,28(4):97-105(in Chinese))
[9]Krawinkler H.Importance of good nonlinear analysis[J].The Structural Design of Tall and Special Buildings,2006,15(5):515-531
[10]周小龙.震损钢筋混凝土框架结构抗震性能评估方法研究[D].重庆:重庆大学,2014(Zhou Xiaolong.Research on seismic performance evaluation method of earthquake damaged RC frame structures[D].Chongqing:Chongqing University,2014(in Chinese))
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