基于强地震动记录的两次Ms7.0级地震破坏能力对比研究

王东明,高永武

振动与冲击 ›› 2018, Vol. 37 ›› Issue (17) : 148-154.

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (17) : 148-154.
论文

基于强地震动记录的两次Ms7.0级地震破坏能力对比研究

  • 王东明,高永武
作者信息 +

Comparison between destructive capacities of Ms7.0 Lushan and Jiuzhaigou Earthquakes based on strong ground motion records

  • WANG Dongming, GAO Yongwu
Author information +
文章历史 +

摘要

设定震中距小于55公里,PGA大于等于50gal为筛选条件,得到芦山地震和九寨沟地震符合条件的16条强地震动记录,提取每条记录的41种地震动强度参数和基于V2时-频反应谱(TFRS)累计动能曲线。建立111种集中质量简化模型,以筛选得到的地震动记录为输入进行弹塑性时程分析,提取每一种结构集中质量处的最大层间位移角和最大楼层加速度峰值。以层间位移角限值为建筑物不同破坏状态参数,得出每条地震记录对111种建筑物的破坏情况。通过对比研究两次地震记录的41种地震动强度参数、基于V2TFRS累计动能曲线和111种结构的破坏状态,定量阐述了九寨沟地震较芦山地震破坏能力小的原因,为科学分析九寨沟地震和芦山地震震害差异性提供了依据。

Abstract

Here,16 strong ground motion records for Ms 7.0 Lushan and Jiuzhaigou Earthquakes were selected with screening conditions of epi-central distance being less than 55 km and PGA being larger than or equal to 50 gal. 41 kinds of ground motion intensity parameters and accumulative kinetic energy curves based on V2 time-frequency response spectrum (V2TFRS) were extracted from each of the selected records. 111 lumped mass simplified models were established to do elastoplastic time history analyses with the selected 16 records taken as inputs,and extract the maximum inter-story drift angle and the maximum peak floor acceleration at the lumped mass of each building.  Taking the limit value of inter-story drift angle as a building’s damage state parameter,damage states of 111 buildings under the action of each of the 16 selected records were obtained. Through comparing 41kinds of ground motion intensity parameters and accumulative kinetic energy curves based on V2TFRS of Ms 7.0 Lushan and Jiuzhangou earthquakes’ground motion records as well as damage states of 111 buildings,the reason why Jiuzhaigou earthquake had a smaller destructive capacity than Lushan earthquake did was described quantitatively to provide a basis for scientifically analyzing the disaster difference between Lushan earthquake and Jiuzhaigou one.

关键词

芦山地震 / 九寨沟地震 / 地震动强度参数 / 累计动能曲线 / 结构破坏状态

Key words

 Lushan earthquake / Jiuzhangou earthquake / ground motion intensity parameters / accumulative kinetic energy curve / structural damage state

引用本文

导出引用
王东明,高永武. 基于强地震动记录的两次Ms7.0级地震破坏能力对比研究[J]. 振动与冲击, 2018, 37(17): 148-154
WANG Dongming, GAO Yongwu. Comparison between destructive capacities of Ms7.0 Lushan and Jiuzhaigou Earthquakes based on strong ground motion records[J]. Journal of Vibration and Shock, 2018, 37(17): 148-154

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