大跨连续刚构桥箱梁抗剪性能数值分析

以苏通大桥的大跨度连续刚构辅航道桥为工程背景,利用非线性有限元分析方法,建立中墩附近节段和跨中弯矩变号附近节段的三维实体单元模型,在考虑原有结构受力状况的条件下,对2个关键区段的抗剪性能进行数值分析,检验原有设计相应截面的抗剪承载力,得到相应结构安全系数、应力分布规律和截面破坏形态。

Numerical Analysis of Shear Behavior of Box Girder of Long Span Continuous Rigid-Frame Bridge

With reference to the secondary navigable bridge of the long span continuous rigid-frame structure of Sutong Bridge,the non-linear finite element analysis method is used to create three-dimensional solid element model for segments close to the intermediate piers and midspan moment number-changing area.In consideration of mechanical conditions of the original structure,the numerical analysis of shearing capacity of the segments in the two critical areas is made,the shearing capacity of the corresponding sections in the original design is checked,and the structure safety coefficients,laws of stress distribution and failure modes of the sections are hence obtained.