Study On The Interaction Effects Between Structures Under The Situation Of Pile Foundation

With the rapid growth of economy and accelerating urbanisation,there is an increasing demand for land of construction in urban areas.In order to accommodate continuously growing population,more and more high-rises and super high-rises have been built,and moreover,the distance between buildings has become increasingly less.When the earthquake happens,the induced interaction not only exists between the building and its foundation,but also between the buildings next to each other.The study and analysis of these interaction mechanisms have a practical significance for future construction works.The main tasks of this paper are as follows:(1)This paper presents an drricient time domain direct method to analyze the dynamic interaction between the three dimensional pile-soil-structure by using the explicit finite element method and the transmitting artificial boundary theory to simulate the soil and pile foundation.we also ues the explicit integral sheme to analysis the cap.we carried out the soil-structure-interaction and the structure-soil-structure-interaction under the pile foundation situation.(2)We have programed and debugged the pile foundation dynamic stiffness analytical program.We anslyzed the related parameters on the basis of dynamic stiffness of pile foundation,and compared the analytical solution of Kynia's to verify the validity of the analysis method.(3)Study on parameters of pile-soil-structure interaction.Based on the theoretical analysis,ten dimensionless parameters which affected the pile-soil-structure interaction were determined.We established 26 different 3-D pile-soil-structure interaction models.And,studied the ten dimensionless parameters under the incident of vertically incident SH waves for the influence law of pile-soil-structure interaction in detail.(4)Study on influence factors of adjacent structure interaction in pile foundation.We set up 6different 3D SSSI calculation models.Using the proposed analysis method,we analyzed the structure responses under the incident of SH wave,P wave,SV wave,mainly discussed the influences of the foundation spacing,arrangement mode,structure size and other factors.(5)Finally,we summarize the research of the artical and put forward the following research direction.