特大跨度连续梁桥箱梁偏位的有限元数值模拟

The Finite Element Numerical Simulation of the Deviation in Extra Long-span Continuous Girder Bridge

为了评估特大跨度连续桥箱梁段施工过程中发生的偏位对桥梁结构安全的影响,采用大型有限元分析(FEA)软件ANSYS,基于有限元理论的数值计算方法,对桥梁结构应力状态进行数值模拟.得出发生偏位与不发生偏位两种受力状态下危险截面正应力、主应力分布的变化.验算了变化的数值是否满足稳定极限承载力来衡量结果的可靠性.

In order to assess the impact of deviation on the safety of bridge structure during the process of construction of large-span continuous girder bridge section of deviation,the large finite element analysis software ANSYS was adopted in the numerical simulation of the stress state of bridge structures,based on the main numerical calculation method of finite element theory.The computer simulation results show the changes in the stress distribution of the dangerous section in the two states of normal stress and main stress.Whether those changes satisfy the stable ultimate bearing capacity was also checked to measure the reliability of the results.