矮塔斜拉桥塔墩梁固结段局部应力分析

Local Stress Analysis on Pier-tower-girder Fixed Segment of an Extradosed Bridge

以某矮塔斜拉桥塔墩梁固结区为研究对象,采用midas FEA大型有限元程序建立塔墩梁固结区实体模型,选取施工阶段及运营阶段的最不利工况,分析塔墩梁固结区空间应力情况。计算分析表明:塔墩梁固结区总体应力水平较为合理,但局部区域存在应力集中,设计中宜进行局部优化。

This paper takes the pier-tower-girder fixed segment of an extradosed bridge as the research object, the finite element analysis program Midas FEA is applied to establish the solid finite element computational model of the pier-tower-girder fixed segment, the most unfavourable condition of construction and operation stage are selected to analyse the spatial stress of the pier-tower-girder fixed segment. The analysis shows that the overall stress level of the pier-tower-girder fixed segment is more reasonable,but stress is concentrated in local areas, local optimization should be considered in the design process.