竖向设计反应谱特征参数的研究  

Study of Characteristic Parameters of Vertical Response Spectra

作　　者：赵培培[1] 王振宇[1] 薄景山[1,2] Zhao Pei-pei;Wang Zhen-yu;Bo Jing-shan(Department of Earthquake Science, Institute of Disaster Prevention, Yanjian 065201 , China;Institute of Engineering Mechanics, CEA, Harbin 150080, China)

机构地区：[1]防灾科技学院,河北燕郊065201 [2]中国地震局工程力学研究所,黑龙江哈尔滨150080

出　　处：《工程抗震与加固改造》2018年第3期159-166,共8页Earthquake Resistant Engineering and Retrofitting

基　　金：廊坊市科学技术研究与发展计划自筹经费项目(2017013002;2017013007);中央高校基本科研业务费青年教师资助计划项目(2017013002;2017013007);国家科技支撑计划项目(2015BAK17B01);国家自然科学基金项目(51208108;51378479)

摘　　要：以国内川滇甘陕地区263个有详细场地资料的强震台站获得的802条竖向地震动加速度记录为研究对象,利用差分进化算法对每条竖向加速度反应谱进行拟合,分析不同场地类别、震级和震中距对竖向加速度反应谱特征参数取值的影响。统计结果表明,竖向设计反应谱的起始周期和衰减指数基本不受各因素的影响,平台值和特征周期均随场地类别的提高而增大,随震级的增大而增大,特征周期随震中距的增大而增大,而平台值随震中距的增大而减小。本文综合考虑各因素的影响,最终给出竖向加速度反应谱特征参数的建议取值,为我国建筑抗震规范中竖向地震作用的修订提供依据。Based on 802 vertical ground motion acceleration collected records,at 263 sites in Sichuan,Yunnan,Gansu and Shanxi,the characteristic parameters of vertical acceleration response spectra are calculated by differential evolution and categorized into parameters as different earthquake magnitude,epicentral distance and soil sites. To investigate the effect of different parameter on characteristic parameters,the statistical analysis is performed. The results show that the starting period and attenuation exponent of the response spectrum of vertical design are not influenced by various factors,both the platform value and the characteristic period increase with the site and earthquake magnitude,the characteristic period increases with the epicentral distance,the platform decreases with the increase of epicentral distance. By considering the effect of various factors,some advices on the characteristic parameters are put-forward,aiming to provide theoretical basis for the revision of vertical seismic action in seismic code of buildings in China.

关 键 词：竖向设计反应谱 场地类别 震级 震中距 特征参数 

分 类 号：TU31[建筑科学—结构工程]