Application of Frequency Response Function in Building Structural Health Monitoring

• Main Authors: Kuo, Ku-Yu, 郭家宇
• Other Authors: Hung, Shih-Lin
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/49530437686448669558

碩士 === 國立交通大學 === 土木工程學系 === 99 === A building structure may sustain damage either when subjected to severe loading like a strong earthquake or when its material deteriorates. The monitoring of the structural health (SHM) of buildings and civil infrastructure has attracted considerable interest in the last decade. Monitoring the structural health of a particular structural system involves a damage identification process that comprises detecting, locating, identifying type of, and estimating severity of, damage. Hence, a reliable, feasible, and economic SHM system is practical for building structures. The aim of this study attempts to utilize frequency response function (FRF) as index in SHM for locating and estimating severity of damage to building structures. First, a numerical study, based on SAP2000 software, is employed to create simulated damage cases including single and multi site(s) damage scenarios. Following, a novel FRF curvature method is developed and applied to locate damage. An ANN model is then utilized to evaluate the severity of damage for single-site cases. Finally, an experimental study is employed to verify the feasibility of the proposed FRF method. The simulation and experiment results expose that the proposed FRF index can locate damage correctly in single as well as multi site(s) damage and the ANN model can estimate the severity of damage for single-site damage cases acceptably.