川滇甘陕地区设计谱的动力放大系数  

Dynamic amplification coefficient of design response spectra in Sichuan,Yunnan,Gansu and Shaanxi

作　　者：赵培培[1] 王振宇[1] 薄景山[1,2] ZHAO Peipei;WANG Zhenyu;BO Jingshan(Department of Earthquake Science, Institute of Disaster Prevention, Sanhe 065201, China;Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute Engineering Mechanics, China Earthquake Administration, Harbin 150080, China)

机构地区：[1]防灾科技学院,河北三河065201 [2]中国地震局工程力学研究所,黑龙江哈尔滨150080

出　　处：《地震工程与工程振动》2018年第3期171-177,共7页Earthquake Engineering and Engineering Dynamics

基　　金：国家科技支撑计划项目(2015BAK17B01);廊坊市科技计划项目(2017013002;2017013007);国家自然科学基金项目(51508096;51208108)~~

摘　　要：以川滇甘陕地区263个有详细场地资料的强震台站获得的2 388条强震记录为基础资料,对每一条水平向强震记录采用差分进化算法确定了动力放大系数β_(max)。在考虑震级、震中距和场地类别基础上,分别统计不同震级、震中距和场地类别的动力放大系数β_(max),并研究了它们对动力放大系数β_(max)的影响。统计结果表明,川滇甘陕地区放大系数谱平台值随着震级的增大而增大,变化规律显著;随震中距没有明显变化;根据统计结果,本文建议川滇甘陕这一地区的Ⅰ类场地动力放大系数β_(max)取2.5,Ⅱ类场地取2.7,本文的研究结果对进一步合理确定动力放大系数β_(max)有重要参考价值。Based on 2 388 strong ground motions,collected at 263 sites in Sichuan,Yunnan,Gansu and Shanxi,dynamic amplification of coefficient horizontal acceleration response spectra are calculated by differential evolution and categorized into parameters as different earthquake magnitude,the dynamic amplification coefficient is studied as a different factor considering the effects of site condition,magnitude and epicenter distance. The results show that amplification coefficient value spectrum platform increase with earthquake magnitude,the trend is more obvious;But the linear relation of dynamic amplification coefficient of response spectrum with the epicenter distance are not obvious. Based on the statistical results,the proposed value of dynamic amplification coefficient is 2. 5 forⅠkind of site.the proposed value of dynamic amplification coefficient is 2. 7 for Ⅱkind of site. The data and the results are instructional for reasonable determination of dynamic amplification coefficient of design response spectra.

关 键 词：放大系数谱平台值 场地类别 震级 震中距 统计分析 

分 类 号：P315.9[天文地球—地震学]