Seismic Damage Evaluation System for Bridge Structures

摘要

In this paper, an evaluation method for multiple damage states of bridge structural system due to strong earthquake is proposed. Then, the bridge structures were divided into each structural element such as piles, footings, piers, bearings, restrainers, super structures, etc. from a systematic point of view, and these elements are interacted each other. Therefore, probability of multiple damage states of structural elements are evaluated by Marcov-chain model based on a damage transition probability matrix which can include damage interaction between the elements. The probability of multi-damage-states for the bridges with countermeasures against earthquakes such as strengthening work for pier, base isolation and fuse type bearing is calculated, and improvement in earthquake resistance of these bridges was estimated quantitatively.