Study On Interaction Of Rigid-Pile Composite Foundation, Raft And Superstructure

The theories and applications of Composite Foundation is a quite active research field in Civil Engineering at present. Nearly more than ten years, the technology of Composite Foundation has obtained considerable development. As the composites reinforced in Composite Foundation are varied, the load bearing mechanism of each kind of Composite Foundation is not identical. As one kind of Composite Foundation, Rigid-Pile Composite Foundation is defined to be used to support upper loads together by Rigid-Piles (such as reinforced concrete piles, concrete piles and so on) and soil around.In this paper, based on the research of previous researchers, a numerical model is used to analyse the interaction of the piles, soil and cushion in the Rigid-Pile Composite Foundation. Meanwhile, Finite Element method is applied to analyse the superstructure and the raft. Then, the raft is analysed by 2D 8-node Mindlin element, and the superstructure is analysed by space pole structure (beam element).Based on previous programs in our research team, applying the upper principles, an object-oriented analyse program OOAPRPCFRS (Object-Oriented Analytical Program for Rigid Pile Composite Foundation-Raft System), which is abbreviated to be OOAP, is created using Visual C++. The main work of this program is calculating of the structure and the postprogress of the analyse. The preprogress of the analyse will be completed by ANSYS program.Then, a small case is calculated using the program OOAP, which is validated by contrasting the result of this program with the result of ANSYS and the test. Lastly, a large case is analysed by OOAP, and the result of the study shows that the numerical model and the program is correct and feasible, and the result is also satisfying.