粘滞阻尼减震SDOF体系的地震响应与地震动强度指标相关性研究  

Correlation Research between Earthquake Responses of SDOF System with Viscous Dampers and Ground Motion Intensity Indices

作　　者：王冬梅 王维[1] 裴星洙[1] Wang Dong-mei;Wang Wei;Pei Xing-zhu(School of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang 212003, China)

机构地区：[1]江苏科技大学土木工程与建筑学院,江苏镇江212003

出　　处：《工程抗震与加固改造》2018年第3期78-86,共9页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金项目(51708257;51708258);江苏科技大学人才引进项目(1122931605)

摘　　要：为了准确预测和分析粘滞阻尼减震结构的地震响应特性,需选用合适的地震动强度指标控制地震动的输入。本文建立了粘滞阻尼减震双线型SDOF体系的计算模型,选取了22条远场地震波,通过非线性时程分析计算了结构的地震响应,详细分析了粘滞阻尼减震SDOF体系的地震响应与18种地震动强度指标的相关性,提出了计算结构的综合地震响应与地震动强度指标相关性的理论公式。研究表明,在0.1s<T<0.6s周期段,结构的综合地震响应与地震动的峰值加速度PGA相关性较高,建议选用地震动的峰值加速度PGA作为粘滞阻尼减震结构抗震分析用地震动强度指标;在T=0.6~2s周期段,结构的综合地震响应与地震动的峰值速度PGV相关性较高,建议选用地震动的峰值速度PGV作为粘滞阻尼减震结构抗震分析用地震动强度指标;在2s<T<6s周期段,结构的综合地震响应与地震动的第一周期谱速度Sa相关性较高,建议选用地震动的第一周期谱速度Sa作为粘滞阻尼减震结构抗震分析用地震动强度指标。In order to predict and analyze the earthquake responses of structures with viscous dampers,it is necessary to use suitable ground motion intensity indices to control the ground motion input. Numerical models of bilinear SDOF systems with viscous dampers are established,then 22 far-field ground motions are selected and the structure seismic responses are calculated by nonlinear timehistory analysis. The correlations between structure earthquake responses and 18 kinds of seismic intensity indices are analyzed. In addition,a novel formula is proposed to evaluate comprehensively the correlations between the structure earthquake responses and the ground motion intensity indices. The results show that,in the period range 0. 1 s 〈T 〈0. 6 s,structure earthquake responses have a high correlation with thepeak groundmotion acceleration PGA,which is recommended as a main index for ground motion selection; in the period range 0. 6 s 〈T〈 2 s,structure earthquake responses are closely related with the peak groundmotion velocity PGV,which is recommended as a main index for ground motion selection; in the period range 2 s〈 T 〈6 s,structure earthquake responses have a high correlation with the spectrum velocity of ground motion Sa,which is recommended as a main index for ground motion selection.

关 键 词：粘滞阻尼减震SDOF体系 地震动强度指标 地震响应 相关系数 

分 类 号：TU352[建筑科学—结构工程]