长周期地震动时域分布特性研究  

RESEARCH ON TIME-DOMAIN DISTRIBUTION CHARACTERISTICS OF LONG-PERIOD GROUND MOTIONS

作　　者：冯英轩 蒋连接[1] 陈季康 李欣远 曾微 崔鑫宇 FENG Yingxuan;JIANG Lianjie;CHEN Jikang;LI Xinyuan;ZENG Wei;CUI Xinyu(Department of Architectural Engineering,Suqian University,Suqian 223800,China)

机构地区：[1]宿迁学院,建筑工程学院,江苏宿迁223800

出　　处：《低温建筑技术》2023年第10期52-55,共4页Low Temperature Architecture Technology

基　　金：江苏省高等学校大学生创新创业训练计划项目(202314160014Z);宿迁市科技计划项目(K202125)。

摘　　要：为探讨两类长周期地震动能量时域分布特性的不同,根据长周期地震动的界定方法,选取30条Wenchuan远场长周期地震动和30条Chi-chi近场脉冲型地震动,基于希尔伯特-黄变换方法,定义并计算各条地震动的能量持时和瞬时能量峰值系数。结果表明远场长周期地震动的平均能量持时和平均瞬时能量峰值系数较大,其能量随时间相对均匀、平稳变化;而近场脉冲型地震动的平均能量持时和平均瞬时能量峰值系数较小,其能量随时间有明显突变,分布更为集中。研究可为定量描述两类长周期地震动能量时域分布特性的差异提供参考。The paper studies the different time-domain distribution characteristics of two kinds of long-period ground motions.30 far-field long-period ground motions of Wenchuan earthquake and 30 near-field pulse-like ground motions of Chi-chi earthquake are selected according to the definition method of long-period ground mo⁃tions.The energy duration and instantaneous energy peak coefficient of each ground motion were defined and calcu⁃lated by Hilbert-Huang Transform method.The results show that the average energy duration and average instanta⁃neous energy peak coefficients of far-field long-period ground motions are large,and the energy changes of far-field long-period ground motions relatively uniformly and stably.The average energy duration and average instantaneous energy peak coefficients of near-field pulse-like ground motions are small,and the energy of near-field pulse-like ground motions has obvious mutation with more concentrated distribution.The research may provide the reference for quantitatively describing the differences in the time-domain distribution characteristics of energy for two kinds of long-period ground motions.

关 键 词：长周期地震动 希尔伯特-黄变换 能量持时 瞬时能量峰值系数 

分 类 号：TU352.1[建筑科学—结构工程]