带损伤多跨连续梁桥变形与裂缝发展分析

Analysis of Deformation and Crack Development of InjuredMulti-Span Bridge

针对带损伤的多跨预应力混凝土连续梁桥,利用ABAQUS有限元软件,建立了三维弹塑性有限元模型,分析了静载条件下带损伤的多跨预应力混凝土连续梁桥的破坏模式、变形特征,得到了不同裂缝宽度、深度及不同裂缝数量下的带损伤连续梁桥的承载能力变化规律、荷载-位移关系曲线。其模拟计算结果可为带损伤的老旧桥梁的运营维护提供一定的理论支持。

A three-dimensional elastic-plastic finite element model for the damaged multi-span prestressed concrete continuous beam bridge is established by using the ABAQUS finite element software. The failure modes and the deformation characteristics of the damaged multi-span prestressed concrete continuous beam bridge under static loading condition are analyzed. Then the changing rule of bearing capacity and the curve for load and displacement of the damaged continuous beam bridge with different crack widths, depths and the number of cracks are obtained. The simulation results can provide theoretical supports for the operation and maintenance of old damaged bridges.