Time-Varying System Identification of Irregular Buildings

• Main Authors: Haung-Wen Wu, 吳凰文
• Other Authors: Chi-Chang Lin
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/88008112723934391127

碩士 === 國立中興大學 === 土木工程學系 === 90 === This paper deals with the applicability of SRIM system identification technique together with time moving windows (called WSRIM) to evaluate the time-varying dynamic properties of a building to assess its damage based on real earthquake records considering soil-structure interaction effect. Successive short segments of input and output signals are selected and the SRIM system identification technique is applied to identify the real-time structural properties during that segment of time. Both numerical simulations and real earthquake response measurements from several building floors and foundations are utilized to verify the accuracy of the proposed time-varying system identification technique. The seven-story Civil and Environmental Engineering Department Building in National Chung-Hsing University is the only instrumented building in Central Taiwan. It experienced moderate structural damage during the 921 Chi-Chi earthquake. This paper is to evaluate the time-varying structural modal parameters of this school building based on the acceleration records during 921 Chi-Chi earthquake main shock and its after-shock. It is proved that the proposed technique is useful for real-time dynamic property assessment of buildings.