基于强震记录的结构动力特性识别  

IDENTIFICATION OF DYNAMIC PARAMETERS OF STRUCTURE FROM RECORDED STRONG MOTIONS

作　　者：周桂林[1] 蒙东刚[2] 沈建增 

机构地区：[1]南京工业大学土木工程学院,南京210009 [2]广西工学院基建处,广西柳州545006 [3]广西城市职业学院机电工程分院,广西扶绥532100

出　　处：《低温建筑技术》2009年第9期59-61,共3页Low Temperature Architecture Technology

摘　　要：通过对结构瞬时频率的分析可以诊断出结构的振动过程和损伤发展规律。本文采用HHT法分析了喜来登环球旅馆于1994年北岭地震中获得的强地震反应观测记录,分析结果表明:对结构强震记录这种强非平稳信号,HHT方法能较好的识别结构的动力特性;分析结构振动中瞬时频率的时变特点,可以直观地掌握强震作用下结构的振动过程和损伤发展规律。The process of structural vibration and the trend of structural damage development caused by strong earthquakes can be detected by estimating the instantaneous frequency. The strong motion records in the longitudinal directions of Sheraton - Universal Hotel during the 1994 Northridge earthquake are analyzed by the HHT method in the paper. The study shows that the HHT method can be used to process the strong non - stationary signal such as structural strong motion records to identify the dynamic properties of structure. The process of structural vibration and the trend of damage development can be understood and grasped by analyzing the instantaneous frequency.

关 键 词：HILBERT-HUANG变换 强震纪录 瞬时频率 

分 类 号：TU311.3[建筑科学—结构工程]