A Two-Step Method for Structural Parameter Identification with Unknown Ground Motion
Simultaneous identification of structural parameters and inversion of ground motion in time domain from measured structural response time histories only have received great interests in recent years. We propose a two-step method in this paper for the problem concerned. The method first identifies the structural parameters of a shear building using the LSM (Least Squares Method) from the free vibration part of the measured responses of the structural system. After the structural parameters are identified, we get the unknown ground motion using the SAA (Statistical Average Algorithm) by solving the motion equation.To verify the effectiveness of the method, we simulate the response of a linear 10DOF (ten-degree-of-freedom) shear-type structure excited by ground motions and make estimations using the simulated responses assumed as observed records. The results show that the method has the preferable precision.
structural parameters identification ground motion inversion two-step method least-squares method statistical average algorithm
Xiang-Jian WANG Jie CUI
Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China Earthquake Engineering Research & Test Center, Guangzhou University, Guangzhou 510405, China
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）