Abstract
This paper aims to propose a seismic performance evaluation procedure for steel framed bridge piers. In this method, the frame is substituted by an equivalent Single-Degree-of-Freedom (ESDOF) system based on the results from pushover analysis. Then the maximum seismic displacement demand and the residual displacement are determined through a time history analysis of the ESDOF or through some empirical ways such as using equal energy criterion. The obtained results are transferred to corresponding demands of the original Multi-Degree-of-Freedom (MDOF) structure. Thus, the safety of the structure can be checked by comparing the transferred demands with the corresponding capacities. Besides, several parametric analyses are carried out and it can be found that the difference in the maximum responses between the prediction from ESDOF system and that directly from the dynamic analysis of MDOF structure is 10% on the average.
