【摘要】 采用有限元程序ANSYS,建立超高层钢框架-核心筒结构的上部结构与地基基础共同作用的整体三维模型,利用ANSYS程序中生死单元技术,模拟分析上部结构逐层施工的过程,研究施工过程中筏板基础的沉降、内力及基底反力的变化规律,并分析了上部结构刚度对筏板基础受力及沉降的影响。考虑上部结构共同作用时,筏板基础的弯矩和差异沉降都将减小,有利于筏板基础受力。更多还原

【Abstract】 The finite element program ANSYS is used to establish the three-dimensional model of the superstructure-foundation-ground interaction of the super-high steel frame-core tube structure. The lifeand-death element technology of ANSYS program is applied to simulate the level-by-level construction progress of the upper structure,and analyze the changing rule of the settlement,internal force and subgrade reaction of the raft foundation in the construction process. Also the stiffness influence of upper structure on the stress and settlement of the raft foundation are analyzed. When considering the interaction of the superstructure,the bending moment and the differential settlement of the raft foundation will be reduced,which is beneficial to the force of the raft foundation.更多还原