摘要
带限位装置的并联基础隔震体系具有摩擦耗能及限位的能力,其隔震效果明显.通过单自由度并联基础隔震结构模型,研究了结构体系摩擦系数及阻尼比对加速度谱和隔震层位移谱的影响,建立了不同类场地的远、近场地震作用下地震影响系数谱及隔震层位移谱,采用时程分析、隔震结构反应谱及规范反应谱分别对实际工程进行了计算,得到并联基础隔震结构层间剪力及层间位移的差异.研究表明,场地类别及地震动特性对基础隔震结构反应谱影响作用较大;隔震结构反应谱计算数值与时程分析结果相近,而规范反应谱计算结果偏大,说明规范反应谱用于基础隔震结构的设计与计算需进行相应的系数折减.研究成果可为基础隔震结构反应谱在实际工程中的应用提供参考依据.
Based-isolated structure with limiting stopper has the capacity of energy consuming and limiting, whose isolated effect is obvious. By the base-isolated structure model of the single degree of freedom, the paper analyzed the friction coefficient and damping ratio influence on the spectra of acceleration and isolation layer displacement, and established the spectra of seismic influence coefficient and isolation layer displacement under the far-near earthquake Rresults showed that the type of seismic field and characteristics of ground motion have a big impact on isolated structure response spectra. Finally, the study compared the layer shear force and displacement calculated by the time-history analysis, and isolated structure response spectra and standard response spectra. The calculated results of isolated response spectra and time-history analysis proved quite close. However, numerical results of the standard response spectra would be larger, which means the corresponding coefficients of response spectra should have a reduction if the standard response spectra was applied for base-isolated structure design and calculation. The results can serve as a reference for base-isolated structure response spectra applied in real construction.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2017年第2期172-178,191,共8页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51278395)
住房和城乡建设部科学技术项目(2016-k5-044)
关键词
并联基础隔震结构
地震反应谱
摩擦系数及阻尼比
远、近场地震
base-isolated structure
seismic response spectra
friction coefficient and damping ratio
far-near earth -quake
