Theoretical Analysis And Test Research On Dynamic Layered Soil-Pile-Structure Interaction

A vast amount of theoretical and test research demonstrates that dynamic interaction has a great influence on the dynamic characteristics of superstructures, and interaction system seismic response may greatly change when the site is soft. As for static or dynamic investigation, the results figured out based on interactive SPS are deviate from that based on fixed-base hypotheses structure and the loading and deforming features exhibited in interactive system under the condition of various soil-layer, soil properties and pile properties etc are also discrepant, so the interactive design of whole foundation and superstructure parts are necessarily and primly emphasized by numerous researchers in engineering practice. So the topic for farther discussion will be developed on the ground of soil-foundation-structure interactions, and emphasizes particularly on the investigation for dynamic effects on interaction of pile-supported structures subjected to lateral seismic load at layered-soil media. By use of theoretical analysis and test research, this dissertation tries to identify the dynamic interaction mechanism of soil-foundation-superstructure and it will provide engineering application with practical, and also offer theoretical basis and design suggestion for seismic design of dynamic soil-pile -superstructure interaction. The article is divided into seven chapters, as follows:1. With the summarization of lots of interrelated references, the studying actuality and developing level which about soil-structure interaction are presented, and the analytical ways of dynamic soil-pile-superstructure interaction are summarized. The limitations, advantages and disadvantages existing in present researches are discussed too. Then the basic research way and analyzing frame route related to upper-lower structural parts with piles in this paper is introduced.2. Dynamic characteristics of site are analyzed comparatively through soil tests. Field tests and laboratory tests are performed, and the difference of results is researched comparatively. Cyclic simple shear test and dynamic triaxial test are performed too, and the difference between them is obtained. Then the reasons of difference are studied. By the use of a soil cyclic simple testing system firstly , which is inputted into our country very newly, cyclic simple shear tests of each layer soil are performed, and the dynamic characteristics of them are obtained.3. Take into account the dynamic nonlinear behaviors of soil, a viscous artificial boundary condition and a viscous-spring artificial boundary condition considering the...