Seismic vulnerability analysis of simply supported continuous bridge during construction

Purpose In order to explore the damage probability of bridge engineering in event earthquake construction stages, analysis method seismic vulnerability stages is proposed this paper. Design/methodology/approach Based on joint simulation function stage conditions and response MIDAS/Civil finite element software, combined with IDA compared relationship between demand capacity. Findings The research shows that: (1) average loss different varies greatly; (2) greatly stages. 6 determined by longitudinal direction bridge. Therefore, during whole bridge, we should focus strengthening disaster prevention strategy insurance (3) application secondary dead load mainly affects fragilityin but has little effect fragility transversal Originality/value This paper a typical simply supported continuous trace entire According characteristics system transformation actual steps, demand-capacity ratios were established based incremental dynamic (IDA) performance indicators moment curvature stability, carried out for prone damage. Furthermore, it provides basis risk assessment such bridges