地基不均匀沉降对上部结构内力和变形的影响

The influences on deformation and internal force of the superstructure caused by ground unequal settlement

应用有限元软件ANSYS研究了地基基础不均匀沉降对上部结构内力和变形的影响.将结构的柱脚和支座简化为固定端,通过在不同的支座处预先施加给定的位移,来模拟分析地基基础不均匀沉降的影响.以深圳市少年宫“水晶石大厅”为例,研究了几种典型情况.分析表明,地基不均匀沉降方式及沉降量的大小对上部结构内力和变形有显著影响,且结构物的柱距直接影响柱的轴力.

The influences on deformation and internal forces of the superstructure caused by ground unequal settlement are analyzed by using the finite element software ANSYS. The unequal settlement affections are simulated by some fixed ends with their displacements given. The Crystal Stone Lobby of Juvenile Palace in Shenzhen is calculated as an example. Several cases are studied, and the results show that the unequal settlement of the basement effects the deformation and internal forces of the superstructure. And the axial force of the column relates with the distance between them.