Application of Automatic Structural Response Monitoring System on Identification of Center of Rigidity

• Main Authors: Guo-shu Wang, 王國書
• Other Authors: Shih-yu Chu
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/78882637253272391246

碩士 === 國立成功大學 === 土木工程學系碩博士班 === 95 === Correct and fast response measurements of structures are the first procedure of structural health monitoring and damage assessment. In order to provide necessary information required by different identification modules rapidly, a Real-Time Structural Damage Assessment and Warning System (RTSDAWS) running in parallel with the existing building arrays installed by Central Weather Bureau (CWB) in Taiwan is developed in this study. Based on up-to-date data-acquisition and signal-processing technology, required signal manipulation modules and a Real-Time Structural Response Integrator (RTSRI) are embedded in the software of this system to perform the automatic structural response manipulating function. The experimental results from shaking table test of a benchmark model in National Center for Research on Earthquake Engineering (NCREE) in Taiwan are chosen to verify the proposed system and it has been implemented at the University Administrative Building (Yun-Ping Building) of National Cheng Kung University for further verification. Since the onest of column failure will cause the redistribution of stiffness that is reflected by the movement of location of center of rigidity (CR), this idea can be used as the indication of failure. A preliminary identication module is deveioped and embedded in the RTSDAWS system in order to achieve rapid assessment requirement. Based on the equation of motion of torsionally-coupled (TC) shear type building, the identification scheme id derived by utilizing the measured acceleration record together with displacement response integrated through RTSRI directly. The feasibility of this module is investigated and verified by numerical simulation through the response of single-story and multiple-story TC models generated by SAP2000 computer software. It shows that the CR moves toward the opposite direction of which the damage developed. This module is then applied to the damage assessment of the Taitung Fire Department Building, located in Taitung City. The results agree well with the reconnaissance report of visual inspection after the Beinan Earthquake on April 1, 2006.