The Modification on the Discreteness of Park-Ang Damage Index Based on Bayesian Methodology  

作　　者：Yi-Bin He Peng Deng Chao Zhang Pu-Sheng Shen 

机构地区：[1]College of Civil Engineering,Hunan University

出　　处：《Journal of Harbin Institute of Technology(New Series)》2014年第1期102-108,共7页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Science and Technology Support Project of China(Grant No.2012BAK15B02)

摘　　要：The discreteness is a common deficiency which impedes damage indices' practical application. It is caused by the arbitrary linear combination and some missing necessary variables. In order to deal with this problem,the correction term was added to the widely cited Park-Ang damage index. The unknown parameters in the correction term were obtained by the maximum likelihood estimation of these parameters' posterior distributions updated through Bayesian methodology. And the specimens for Bayesian updating were selected from PEER column database and Kawashima Earthquake Engineering Laboratory. Through model simplification process,a simplified modification was adopted,which has improved its goodness of fit to the experimental data. It has been found that the concrete core area and cross sectional area ratio,the longitudinal reinforcement ratio and the damage concentration factor are the critical variables affecting the error of the original damage index.The discreteness is a common deficiency which impedes damage indices＇ practical application. It is caused by the arbitrary linear combination and some missing necessary variables. In order to deal with this problem, the correction term was added to the widely cited Park-Ang damage index. The unknown parameters in the correction term were obtained by the maximum likelihood estimation of these parameters＇ posterior distributions updated through Bayesian methodology. And the specimens for Bayesian updating were selected from PEER column database and Kawashima Earthquake Engineering Laboratory. Through model simplification process, a simplified modification was adopted, which has improved its goodness of fit to the experimental data. It has been found that the concrete core area and cross sectional area ratio, the longitudinal reinforcement ratio and the damage concentration factor are the critical variables affecting the error of the original damage index.

关 键 词：bayesian methodology damage index reinforced concrete seismic behavior 

分 类 号：TU375.3[建筑科学—结构工程]