Risk-based Decision Analysis for Optimal Seismic Rehabilitation of a Building Structure

초록

In this study a risk-based decision analysis procedure for seismic rehabilitation is presented where the sum of the cost required for the rehabilitation and the expected seismic loss over a specified time period is minimized. Probabilistic seismic hazard model (PSHM) and probabilistic seismic demand model (PSDM) are utilized for manipulation of the uncertainty propagation from the seismic hazard to the structural damage. A mathematical formula is then developed for probabilistic estimation of the seismic damage and loss over a specified time period. The proposed procedure is demonstrated by performing a decision analysis for determination of the optimal level of seismic rehabilitation of a hypothetical RC building structure. The analysis model developed enables a prompt observation of the effect of the different configurations of the decision inputs such that a dynamic decision can be effectively supported.