The Finite Element Analysis For Interaction Of Top Structure Raft Foundation And Soil Under Different Raft Theory

Raft foundation is widely used in hinghrise building due to its many advantages. At present,the analysis for internal forces properties of raft foundation is not completely compatible and raft theoy is poor.The effect on interaction of top structure,raft foundation and soil is great variant than not considerding interaction. Currently,in the traditional designing,people are tend to separate whole systerm into there pieces to obtain the equation,but different parts only meet statics equilibration less than displacement compatibility.The results by this method is very different from real consequence.This method make the whole systerm unsafely and not economically.In this text,on the basis of analysing domestic and international conclusion and methods about interaction to analysis the interaction of frame structures-raft-soil by different raft theory.To establish the whole model including top structure,raft foundation and soil using different theory to simulate raft.In the conditions of interaction,using ANSYS to calculate the results under static load.The results reveal the internal forces and displacement of raft foundation,top structure and soil under different raft theory.At the same time,the text illustrates influence of raft foundation's internal forces by rigidity of top structure and soil and reveals the favourable range between sheet plate theory and medium-thickness plate theory and their difference.To summarize the regular pattern of internal forces of raft foundation and the factors that effacting raft's property and make known the secondary stress of top structure. Finally,according to results,this text gives some rational suggestion to deigning and construction of high-rise.