PRELIMINARY STUDY ON THE FRAGILITY CURVES FOR HIGHWAY BRIDGES IN TAIWAN

摘要

This paper describes procedures of bridge fragility analysis for the highway bridges on the south-north freeway in Taiwan, and studies the evaluation of parameters used in bridge damage assessment. The fragility curves are used to represent the probabilities that structural damage, under various levels of seismic excitation, exceed specified damage states. Since it is neither necessary nor practical to evaluate individual bridges, bridge classification and mapping scheme plays an important role. Calculation of site-specific seismic demand and damage functions (i.e., capacity curves and fragility curves) are the key features in bridge damage assessment and earthquake loss estimation.