双向地震激励的标准化弹塑性位移反应谱  

Normalized Elastic-plastic Displacement Spectra for Bi-directional Earthquake Excitations

作　　者：王丰[1] 王楠楠[1] 张振楠[1] 许海军[1] 

机构地区：[1]大连民族学院土木建筑工程学院,辽宁大连116605

出　　处：《大连民族学院学报》2015年第1期69-72,共4页Journal of Dalian Nationalities University

基　　金：国家自然科学基金资助项目(51108067;51478091);辽宁省高等学校优秀人才支持计划资助(LJQ2014139);中央高校基本科研业务费专项资金资助项目(DC120101095)

摘　　要：针对实际地震动作用的多维性和结构非线性反应的空间耦合特点,建立了双向地震激励的单质点双自由度模型,假定此模型的恢复力关系符合二维屈服面函数。按硬、中、软土场地分类共选择89组双向地震动记录作为系统的激励,建立了统计平均的标准化弹塑性位移反应谱。分析了场地类别、延性系数、两主轴方向周期比对标准化弹塑性位移谱的影响。In view of the space coupling characteristics of multi-dimensional and structural non-linear responses of actual earthquake excitations, the model of single mass bi-degrees of free-dom system subjected to bi-directional earthquake excitations is established, in which the yield rule of the system is determined by two-dimensional yield-surface plasticity function. The 89 pair bi-directional earthquake motion records of hard soil site, intermediate soil site and soft soil site are selected as earthquake excitations of the single mass bi-degrees of freedom system, and the mean normalized elastic-plastic displacement spectra of constant ductility factors are established. The influence factors of normalized displacement spectra such as soil site, ductility factor and period ratio of bi-directions are analyzed.

关 键 词：弹塑性位移谱 双向地震激励 延性系数 

分 类 号：P315.9[天文地球—地震学] TU311.3[天文地球—固体地球物理学]