TY - GEN
T1 - Hierarchical Bayesian estimation of mixed hazard models
AU - Mizutani, Daijiro
AU - Matsuoka, Kodai
AU - Kaito, Kiyoyuki
PY - 2013
Y1 - 2013
N2 - A variety of uncertainties affect the deterioration process of infrastructure. Deterioration rate is varying significantly according to the difference in the structural characteristics, use, and environmental conditions of infrastructures. The heterogeneity of structures causes the problem of overdispersion of the deterioration rate. In order to overcome the problem of overdispersion, the mixed Markov deterioration hazard model has been proposed considering the heterogeneity of deterioration rate among groups of infrastructures. In this study, it is assumed that the overdispersion depends on the heterogeneity of the deterioration rate among groups of infrastructures. Then, the mixed Markov deterioration hazard model that takes into account hierarchical heterogeneity is formulated, and a hierarchical Bayesian estimation method is proposed. The appropriateness of the proposed method is discussed through the empirical analysis of the visual inspection data of bridge slabs.
AB - A variety of uncertainties affect the deterioration process of infrastructure. Deterioration rate is varying significantly according to the difference in the structural characteristics, use, and environmental conditions of infrastructures. The heterogeneity of structures causes the problem of overdispersion of the deterioration rate. In order to overcome the problem of overdispersion, the mixed Markov deterioration hazard model has been proposed considering the heterogeneity of deterioration rate among groups of infrastructures. In this study, it is assumed that the overdispersion depends on the heterogeneity of the deterioration rate among groups of infrastructures. Then, the mixed Markov deterioration hazard model that takes into account hierarchical heterogeneity is formulated, and a hierarchical Bayesian estimation method is proposed. The appropriateness of the proposed method is discussed through the empirical analysis of the visual inspection data of bridge slabs.
KW - Heterogeneity
KW - Hierarchical Bayesian estimation
KW - Mixed Markov hazard model
UR - http://www.scopus.com/inward/record.url?scp=85088194687&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85088194687&partnerID=8YFLogxK
U2 - 10.2749/222137813806481428
DO - 10.2749/222137813806481428
M3 - Conference contribution
AN - SCOPUS:85088194687
T3 - Assessment, Upgrading and Refurbishment of Infrastructures
BT - Assessment, Upgrading and Refurbishment of Infrastructures
PB - International Association for Bridge and Structural Engineering (IABSE)
T2 - IABSE Workshop on Assessment, Upgrading and Refurbishment of Infrastructures
Y2 - 6 May 2013 through 8 May 2013
ER -