ABSTRACT

The residual displacement of column has significant effect on the post-earthquake functionality of bridge. In this paper, the nonlinear finite element model of a simply supported beam bridge was built. The seismic performance of reinforced concrete column, unbonded prestressed reinforced concrete (UBPRC) column, and fully prestressed column was compared. Quasi-static residual displacement was adopted in the fragility analysis. The result showed that the quasi-static residual displacement affects the vulnerability of bridge system only for the collapse damage limit state. UBPRC column is a good balance between the vulnerability arising from peak displacement and residual displacement.

摘要

柱的残余位移对桥梁的震后功能影响很大。本文建立了简支梁桥的非线性有限元模型。比较了钢筋混凝土柱、无粘结预应力钢筋混凝土 (UBPRC) 柱和全预应力柱的抗震性能。脆性分析采用准静态残余位移法。结果表明，准静态残余位移仅对倒塌破坏极限状态下的桥梁系统易损性有影响。UBPRC 柱很好地平衡了峰值位移和残余位移引起的脆弱性。