| Through a large amount of experimental study and theoretical analysis,we know that dynamic interaction has a great influence on the dynamic characteristics of superstructures, and interaction system on seismic response,especially when the structure in the soft foundation soil, the impact gonna be more significant, the Seismic response will occur more important changes.In the early days of the seismic design,we usually adopt rigid foundation assumption for the analysis of seismic response, we put the free field seismic wave directly to the upper structure,without considering the soil structure. The rigid ground assumption can reasonable to meet the required engineering precision when the upper structure have smaller stiffness, and bigger foundation stiffnes,But when the stiffness difference is very small between the upper structure and foundation, the seismic response of upper structure will produce larger error.In this paper, on the basis of domestic and foreign research development status and results of soil- structure interaction,we use 12 layer reinforced concrete frame structure as the research object, to conduct a research of soil- structure interaction on seismic ground motion.This study provides a practical methods for seismic response analysis of soil-structure dynamic interaction, it provides a strong basis for understanding and research the soil-structure interaction effects and seismic design method of high-level framework structure.A finite element seismic response analysis was conducted on the interaction system of soil-structure of frame strcture.The main works are listed as following:At first, the paper summarized the research achievements of soil-structure interaction,and listed the development and research status of home and abroad,and expland the conception of SSI,and the importance of these work,this paper briefly introduced the main research method,and then told us the important theory about SSI,mainly includes seismic response analysis method and the dynamic equation and its solving method, reasonable selection of the calculation model, the soil constitutive, etc.Also introduced the artificial boundary theory, it is the important theory of soil- structure interaction.Then, in this paper, I conduct a modal analysis for the general structure and the upper structure, as well as the free field seismic analysis of the proposed site, it is the foundation of time history analysis; Finally, the article conducted timehistory analysis on considering and not considering SSI, and then change the factors and draw the conclusion. |
