The Elasticity-Plasticity FEM Analysis Of Composite Foundation

Along with the fast development of national economy, the construction scale of civil engineering enlarges increasingly. The foundations have been put forward higher requirement by the modern construction of civil engineering, more and more natural foundations need to carry out artificial handling. The composite foundations have been relatively extensive used in actual project since the column and the soil are all considered to undertake the loads, and the cost of handling is lower than other methods. But since the factors affecting the composite foundation are very complex, the engineering properties are still not analyzed completely. There are many problems that must be solved. So it is necessary to analyze the composite foundation deeply.This paper is on the basis of analyzing and researching domestic and international literatures and the situation. The models of single column and multi-column composite foundation have been carried out in it with using the Drucker-Prager theory and ANSYS procedure. And the conclusions have been gained by analyzing the results. The main contents of research are as follows:1. According to Drucker-Prager elasticity-plasticity theory, making the models of single column and multi-column composite foundation by using the ANSYS procedure.2.The engineering properties are analyzed in different conditions.3.According to the results, each factor, which affects the engineering properties of the composite foundation, is analyzed.The properties of the carrying capacity have been gained while the factors, which affect the engineering properties of the composite foundation, have changed, and also gaining the properties of the composite foundation under different load circumstances and other different affecting factors. The conclusion of income has certain reference value for construction and the design of composite foundation.