Reduced order observer based identification of base isolated buildings

作     者：Satish Nagarajaiah Prasad Dharap 

作者机构：Dept.of Civil and Env.Eng.Rice UnivHoustonTX 77005 USA Associate Professor Dept.of Civil and Env.Eng.Rice UnivHoustonTX 77005 USA Graduate Student 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2003年第2卷第2期

页      面：237-244页

核心收录：

学科分类：081405[工学-防灾减灾工程及防护工程] 08[工学] 0814[工学-土木工程] 

基　　金：grant NSF-CMS-9996290 

主　　题：use hospital building base isolation least squares system identification time segments reduced order observer Northridge earthquake 

摘      要：The objective of this study is to identify system parameters from the recorded response of base isolated buildings,such as USC hospital building,during the 1994 Northridge *** state measurements are not available for ***,the response is nonlinear due to the yielding of the lead-rubber *** new approaches are presented in this paper to solve the aforementioned ***,a reduced order observer is used to estimate the unmeasured ***,a least squares technique with time segments is developed to identify the piece-wise linear system *** observer is used to estimate the initial conditions needed for the time segmented identification.A series of equivalent linear system parameters are identified in different time *** is shown that the change in system parameters,such as frequencies and damping ratios,due to nonlinear behavior of the lead-rubber bearings,are reliably estimated using the presented *** is shown that the response was reduced due to yielding of the lead-rubber bearings and period lengthening.