地震动的空间变化特性分析与修正相干模型  

Analysis and modeling for characteristics of spatially varying ground motion

作　　者：李英民[1,2] 吴哲骞[1] 陈辉国[1,3] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045 [3]后勤工程学院军事建筑工程系,重庆401311

出　　处：《振动与冲击》2013年第2期164-170,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(90815011);教育部新世纪人才计划(06-0765)

摘　　要：利用空间地震动相关性描述度量如相关、相干函数分析地震动在局部尺度内的相关性随空间距离、频率的变化规律。在此基础上,基于随机场基本理论对Harichandran-Vanmarcke模型进行了修正,在原一维模型基础上考虑了空间的二维因素,并通过Smart-1台阵event-40记录给出了模型参数的具体取值。The analysis of muli-point ground motion characteristics with space distance and frequency was performed. Based on the second-order theory of random fields, a new mathematical model was proposed, as an enhancement on the model of Harichandran-Vanmarcke, taking a 2-D spatial factor into account . The accelerograms recorded by SMART 1 seismograph array in Lotung Taiwan were used to determine the parameters of the correlation model. Finally, a comparison was made between the new model and Hao model, it was shown that the proposed model has an excellent performance.

关 键 词：多点地震动 台阵记录 相干模型 参数分析 特性分析 

分 类 号：TU318[建筑科学—结构工程]