箱涵施工分层填筑过程的三维有限元模拟

The three-dimensional finite element simulation to box-culvert layered filling construction process

在ABAQUS有限元软件的基础上,先建立箱涵的三维实体模型,再运用其多步分析和生死单元功能,对箱涵的施工填筑过程进行模拟。文中对箱涵的分层计算和整体计算结果进行了对比,对比结果表明:在仅考虑混凝土弹性性质的基础上,合理地模拟施工填筑过程时,箱涵的应力和位移均大于整体计算结果的10%左右。考虑到计算方法的复杂性和工程应用中的适用性,仅建议在复杂和重要的工程中,对箱涵的施工填筑过程进行模拟。

A box-culvert three-dimensional numerical model is first established on the basis of ABAQUS finite element in this paper.Then the simulation to box-culvert layered filling construction process by using the multi-step analysis and the birth-death element approach.The layered calculation and overall calculation have been compared in the paper.The comparing results show that both the stress and displacement of boxculvert are higher than about 10%to the overall calculation on the basis of only thinking the elastic properties of concrete and appropriate layered filling construction process.The simulation to box-culvert layered filling construction process can only be established on the complex and important engineering due to the complexity of calculation method and the applicability of the engineering application.