高层建筑筏形基础沉降变形有限元计算

Research on the Calculation of Raft Foundation Settlement Deformation of the High Building

通过采用6种不同密度的有限元网格对实际工程筏基变形作有限元计算并与沉降观测值比较,分析了有限元网格密度对筏基沉降变形计算的影响,提出了筏基工程变形计算中有限元网格尺寸的适宜大小选取原则,对筏板基础工程设计具有一定的参考意义。

Six different densities of meshing in FEA are used to calculate the deformation of raft foundation in practical engineering,and the comparison between the calculated values and the measured ones is conducted.The effect of the mesh density on the deformation calculation of the raft foundation is analyzed.The result indicates that the calculated values are comparatively stable and close to the surveyed ones when the mesh's side length is 1.5-2 times the thickness of the raft board.