应用MIDAS进行空心楼盖有限元设计的方法研究

Research of finite element design method of cast-in-situ concrete hollow floor using MIDAS

有限元法计算空心楼盖,取代了等代框架梁法中构件等代以及计算结果重分配的设计方法,直接采用二维板单元模拟空心楼板,且有限元模型能真实模拟构件的边界条件,直观反映各区域的内力分布情况,因此在合理划分网格的情况下,其计算结果可方便快捷地应用于设计。应用ABAQUS三维实体建模,验证了二维板单元模拟空心板的有效性。探讨了空心楼盖暗梁建模的正确方法。

To design hollow floor,there always has a common way: equivalent frame method. But it has a low accuracy when the boundaries are complex. Replace of the common way,this paper calculated the hollow floor with finite element method which used two-dimensional plate element. Moreover the finite element model could simulate the boundary conditions of the components realistically and reflect the regional distribution of internal forces directly. In addition,using three-dimensional solid modeling to simulate hollow floor with ABAQUS verified the validity of the two-dimensional plate element. The result shows that the results calculated by finite-element method with reasonable meshing have a prefect accuracy to be used in design. Besides,this article also explores the correct way to model the hidden beam of hollow floor and presents some suggestions for simulation.