不同R-μ-T关系下基于规范的能力谱法RC结构易损性分析  

V ulnerability analysis of RC structures with different R-μ-T relationships by capacity spectrum method based on specifications

作　　者：陈戴维 马东辉[1] 任媛媛 王威[1] Chen Daiwei;Ma Donghui;Ren Yuanyuan;Wang Wei(Faculty of Architecture,Ciwil And Transporation Eninering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学城市建设学部,北京100124

出　　处：《建筑科学》2024年第5期30-38,共9页Building Science

基　　金：国家自然科学基金项目(52278472);北京市自然科学基金项目(8232004)。

摘　　要：确定地震动作用下结构非弹性需求谱曲线对采用能力-需求谱法进行抗震易损性分析具有重要意义。为建立不同R-μ-T关系获得非弹性谱对结构位移响应的影响,本文结合我国建筑抗震设计规范得到基于Ry的规范非弹性谱,并以一栋12层的高层钢筋混凝土框架结构为研究对象,针对不同R-μ-T关系得到非弹性谱对结构目标位移影响进行对比分析。然后本文基于不同R-μ-T关系得到结构位移对结构进行易损性分析,从抗震性能评估的应用角度研究不同R-μ-T关系对结构的影响。研究表明,不同R-μ-T关系的非弹性需求谱得到结构目标位移随地震动强度增加差异逐渐增大,整体差异较小;通过将不同R-μ-T关系下结构的易损性与理论易损性对比发现不同模型计算对结构易损性整体上影响较小,这也验证了基于强度系数折减的能力谱法的有效性。It is of great significance to determine the inelastic demand spectrum curve of structures under ground motion for the seismic vulnerability analysis by capacity-demand spectrum method.In order to establish the influence of different R-μ-T relations to obtain inelastic spectrum on structural displacement response,the Ry-based standard inelastic spectrum is obtained in combination with China's seismic design code for buildings.A 12-story RC structure is taken as the research object,and the influence of inelastic spectrum obtained by different R-μ-T relations on structural target displacement is compared and analyzed.Then,based on the different R-μ-T relationships,the vulnerability analysis of structural displacement is carried out,and the influence of different R-μ-T relationships on structures is studied from the perspective of seismic performance evaluation.The results show that the difference of structural target displacement obtained by inelastic demand spectrum with different R-μ-T relations increases with the increase of the ground vibration intensity,and the overall difference is small.By comparing the structural vulnerability with theoretical vulnerability under different R-μ-T relationships,it is found that different model calculations have little influence on the overall structural vulnerability,which also verifies the effectiveness of the capacity spectrum method based on strength factor reduction.

关 键 词：能力-需求谱法 规范非弹性需求谱 R-μ-T关系 结构易损性 

分 类 号：P315[天文地球—地震学]