| As a new subject arisen in these years, the research of dynamic analysis on pile-soilsystem is valued by the whole world. But most of the methods of the analyses is linear andthere are few of non-liner & elastic-plastic methods. On the other hand, the conclusion ofanalyses on pile groups-soil are mostly depended on the experience. And there are notenough micro-analyses on the displacement and strain inside the pipe group.With the development of computer technology, it is valuable to make big calculationin a shout time. Aimed at the two problems mentioned above, the paper analyses thedynamic & seismic analysis on pile-soil system with finite element method.During the period of setting up models, the paper set the constitutive model anddynamics behavior model of pile-soil system first. And then settled the problem on the soilboundary and the conjunction between soil and pile. At last four models were set: soilonly, one pile-soil, two piles-soil and three piles-soil.With the methods of spectrum analysis and earthquake transient response,towardswith the different nodes in a same model and a same node in different models, the papercarried on analysis to research the displacement of x,y-direction and the strain ofx-direction. And at last I got a lot of figures and data. By sifting and comparing the figuresand data, the following results were got:1,The Ux of the nodes in same level direction is unchanged in one model.2,Compared with the soil outside the piles, the piles reduced the Uy of the soilbetween piles in one model.3,The Sx of the nodes in same level of the same model is symmetric byY-coordinate.4,Proved the appearance of the efficiency of pile groups and together got thecharacter of the changing of Ux,Uy and Sx by comparing with the four modelsmentioned above.5,With the increase of the number of piles, I got the law of the changing on the Ux,Uy and Sx of a same node: in soil outside the piles, in the soil among the pilesand inside the pile.
|
PDF Full Text Request