摘要
近断层脉冲型地震动在反应谱和频谱方面的特殊性质,是造成近场中、长周期结构震害的主要影响因素。准确识别并提取近断层地震动的脉冲特性,对脉冲型地震动模拟反演、分析脉冲作用下结构反应特征规律、评估近场结构抗震性能及进行结构抗震设防设计等均有重要意义。通过研究基于连续小波变换、基于能量和基于EM&G三种典型脉冲型地震动识别方法的识别原理和识别效果,分析了不同方法的优缺点,总结出应采用多种方法进行重复识别的脉冲特征确认建议,并基于PEER数据库对脉冲型地震动进行识别验证,归纳梳理了脉冲型地震动在断层距、场地类型方面的分布特征。
The special properties of near-fault pulse-type ground motion in response spectrum and frequency spectrum are the main influencing factors causing seismic damage to near-field medium and long-period structures.Accurately identifying and extracting the pulse characteristics of near-fault ground motion is of great significance for simulating and inverting pulse-type ground motion,analyzing structural responses characteristic under pulse action,evaluating the seismic performance of near-field structures,and conducting seismic fortification design of structures.By studying the recognition principles and recognition effects of three typical recognition methods for pulse-type ground motion based on continuous wavelet transform,energy,and EM&G,respectively,the paper analyzed the advantages and disadvantages of different methods,summarized the suggestions for confirming pulse characteristics that multiple methods should be adopted for repeated recognition,and conducted recognition and verification of pulse-type ground motion based on the PEER database.The distribution characteristics of pulse-type ground motion in terms of fault distance and site type were sorted out.
作者
雷屹欣
陈辉国
杨晓瑞
LEI Yixin;CHEN Huiguo;YANG Xiaorui(Joint Logistic Support Force University of Engineering,Chongqing 401331,China)
出处
《华南地震》
2025年第2期40-49,共10页
South China Journal of Seismology
基金
重庆市自然科学基金面上项目(cstc2019jcyj-msxmX0218)
重庆市教育委员会科学技术研究项目(KJZD-K021912903)联合资助。
关键词
近断层脉冲地震动
脉冲特性
定量识别方法
Near fault pulse-type ground motion
Pulse characteristic
Quantitative recognition method
