预应力混凝土空心板简支梁桥抗震性能数值分析

Numerical Analysis on the Aseismic Performance of Prestressed Concrete Voided Slab Simple Beam Bridge

针对地震灾区城市道路桥梁结构的抗震问题，以有限单元法基本理论为基础，采用大型非线性有限元程序MIDAS／Civil和三维有限元法，建立了地震灾区城市道路预应力混凝土空心板筒支梁桥动力有限元模型。分析了在E1、E2地震作用下，桥梁结构各控制截面的抗弯、抗剪能力，以及支座厚度和抗滑稳定性等抗震性能。结合理论计算分析结果，提出切实可行的抗震措施，为地震灾区城市道路桥梁结构施工质量控制提供必要的理论指导与技术支持。

Aiming at the aseismic problem of urban bridge structures in the earthquake area, based on Finite Element Method （FEM）, the large-scale non-linear finite element program MIDAS/Civil and the 3-D FEM are used to establish the dynamic finite element model for urban prestressed concrete voided slab simple beam bridge in the earthquake area. Under the earthquake action of E1 and E2, the aseismic performance such as anti-bending, anti-shear capacity of key sections, and thickness and anti-sliding stability of the bearing have been analysed. Ac- cording to the theoretical calculation analysis results, practical aseismic measures have been proposed, and the nec- essary theoretical guidance and technical support will be provided for construction quality control of urban bridge structures in the earthquake area.