抄録
This study proposes a formulation for applying Bayesian updating for safety inspection of steel frames suffered from strong ground motion in which beam-to-column connections are potentially fractured. In the proposed method, probability distributions of deformation demand and capacity of connections are modeled as that their variations are divided into those of the average error as whole building, and those of deviations from the average. Then, Bayesian updating is applied for the former alone. In order to use for the proposal method, the variations in demand and capacity of connections are examined. For demand, MCS (Monte Carlo simulation) for time history analysis shows that the variation of the maximum rotation at beam-to-column connections is estimated to be 12 to 14% s logarithm standard deviation. For capacity, about 20 % as logarithm standard deviation is statistically estimated from past structural tests for cumulative plastic deformation ratio. Finally, an MCS for a 9-story plan frame is presented as an illustrative example to examine the accuracy of the proposed method.
