竖向地震动特征研究  

Study on characteristics of vertical ground motion

作　　者：周正华[1] 周雍年[2] 卢滔[2] 杨程[2] 

机构地区：[1]哈尔滨工业大学,黑龙江哈尔滨150090 [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》2003年第3期25-29,共5页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金"九五"重大项目资助(59895410)

摘　　要：本文以国内外数十次地震(ML≥5)的近场自由地表加速度记录为基础数据,进行近场加速度峰值比的统计分析,并着重对1999年台湾集集地震竖向地震动反应谱特征进行研究。统计结果表明,竖向与水平向(V/H)加速度峰值比与震源距相关,随震源距增加,比值降低;竖向反应谱及竖向与水平向加速度反应谱比是周期的函数、并与场地条件及震源距相关。In this paper, the statistic analysis of vertical to horizontal ( V/H ) peak acceleration ratio is done by using near-field free-field accelerograms recorded from tens of earthquake (ML≥5) occurred at home and abroad. In the meanwhile, the characteristics of the vertical response spectra of the 21 September 1999 Chi-Chi, Taiwan, earthquake are examined. The results show that the V/H peak acceleration ratios are reduced as the distance of site to the fault is increased, and the vertical response spectra and the ratios of vertical to horizontal response spectra vary as a function of period and are related to distance to the fault and site condition.

关 键 词：竖向地震动 V/H加速度峰值比 场地条件 1999年 集集地震 竖向反应谱 震源距 

分 类 号：P315.9[天文地球—地震学] TU435[天文地球—固体地球物理学]