非弹性反应谱衰减规律研究  

Study on the attenuation of inelastic response spectra

作　　者：公茂盛[1] 翟长海[2] 谢礼立[1] 

机构地区：[1]中国地震局工程力学研究所,黑龙江哈尔滨150080 [2]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《哈尔滨工业大学学报》2006年第5期761-763,共3页Journal of Harbin Institute of Technology

基　　金：教育部博士点资助项目(20030213042);黑龙江省自然科学基金资助项目(E0221;E0226;E0228)

摘　　要：为研究非弹性反应谱的特征,选用美国西部Californ ia州15次较大地震中的266条强地震动记录,建立了非弹性反应谱衰减规律.分析了场地条件、延性系数、震级及距离等参数对非弹性反应谱的影响.研究发现,随着场地变软或震级增大,非弹性反应谱增大;随着延性系数增加,非弹性反应谱降低,但延性系数增加到一定程度,谱值变化不大;随着距离增加,每个周期的非弹性反应谱值衰减很快.To study the characteristics of inelastic response spectra, an attenuation relationship is established for inelastic response spectra involving earthquake magnitude, souree-to-site distance, and site class based on 266 strong ground motion records which collected from 15 strong earthquakes in California of America. The effects of parameters such as magnitude, site class and ductility factor on inelastic response spectra are discussed. It is found that the inelastic response spectra increase with the increasing of magnitude and softening of site, but decrease with the increasing of ductility factor. The inelastic response spectra attenuate quickly with the increasing of distance.

关 键 词：非弹性反应谱 强地震动 衰减规律 回归分析 

分 类 号：P315.9[天文地球—地震学]