Numerical research on foundation settlement of frame structure loaded floor by floor

Numerical model considering the interaction of structure,foundation and soil is established with ANSYS,whose function of element birth and death can be employed for loading floor by floor.Results indicate that two loading methods,which are loading floor by floor and loading one time,respectively,have little influence on ultimate settlement;settlement curve does not increase linearly with the floor number,and nonlinear relationship between the curve and the floor number will be obvious when the floor number up to certain value,more the floor numbers are,more obvious the nonlinear relation is.Then the concepts,which are the nonlinear accumulation of foundation settlement and the settlement discrepancy between adjacent foundations,are put forward.The achievements will contribute to the further study on nonlinear mechanics of foundation settlement,and provide theoretical guidance for design and construction of frame structure.