桥梁仿真计算分析

摘要

Taking the main bridge of some bridge over river as the example,the paper adopts the large-scale general finite element analysis software to establish the spatial finite element model for the through type steel pipe concrete arch,adopts the numeric simulation method to calculate the internal stress and displacement of the tie beam when the arch is affected by the elastic damage within the 1 m of the end of the tie beam,as well as the gravity and prestress,and analyzes the influence of the end damage of the tie beam on the static dynamic performance of the bridge,so as to provide the reference for the loading capacity and the safety of the bridge.%以某跨河桥主桥为例,利用大型通用有限元分析软件建立了下承式钢管混凝土拱桥的空间有限元计算模型,采用数值仿真方法计算该拱桥在系杆梁端部1 m范围内弹性破坏情况下以及自重和预应力作用下,系杆梁的内力和位移,分析系杆梁端部单元损伤对桥梁静态力学性能的影响,为了解桥梁承载力和安全性提供了依据。