A Comprehensive Decision on Seismic Performance of Long Span Girder Bridges with Typical Piers for Whole Construction Process

This study focuses on the seismic design difficulties of long span girder bridges with typical piers of the whole construction process.The capacity/demand method and the analytic hierarchy process were combined to establish a set of comprehensive decision frame for the synthetic decision on their seismic performance of the whole construction process by considering all essential factors in the design under the condition that their seismic design requirements of the permanent state were met.Then rational decision strategies were presented to decide the optimal seismic design scheme in the bridges quantitatively in terms of the comprehensive seismic performance of the whole construction process.The results show that the weight ratio of the bridges with typical piers,the vase-type-solidpier continuous girder bridge,the rectangle-hollow-thin-wall-pier,and the double-column-solid-pier is0.340:0.327:0.333 when their earthquake resistance in the whole construction process is satisfied.Namely,the vase-type-solid-pier