The Research On Soil-Structure Dynamic Interaction For Reasonable Seismic Input

For a long time, the rigid ground assumption has been used for earthquake response analysis in the seismic design in which only superstructure is considered in the model 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. 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 diversity motions of superstructures based on the rigid ground assumption at different input of ground motions, Analysis can be calculated attempt to better reflect the dynamic characteristics of the interaction of rigid base to import waves, The results contrast with the interaction system. 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 five chapters, as follows:1. Recalling the dynamic soil-structure interaction research on the theory of the development of history, various research methods, and some of the major problems in this area. and, in particular, the results of this research in the field of seismic design code in domestic applications.2. The test of a large-scale outdoor model of soil-pile foundation-RC frame structure is introduced. Including model where dynamic properties of soil experiments and field tests measuring point distribution model. all the basic dynamic test conditions.3. ANSYS general-purpose finite element software used to establish a large proportion of the field test model three-dimensional solid finite element model and detailed descriptions of the methods and models used in the calculation method ideas of various aspects of numerical analysis. Then the model for the numerical simulation of a number of conditions, and the data were compared with the test site. verifies the reliability and accuracy of the finite element model.4. Field test site for a large proportion of the free market model of the earthquake response analysis of the surface to obtain rigid foundation model input Liberty seismic response of the market to make a brief analysis of some of the practices and laws.5. Based on the first two chapters'model data and calculation, rigid foundation model used for a variety of conditions and the pile-driving force of upper frame structure interaction system for earthquake response analysis, and compare different seismic waves imported under rigid foundation model of the dynamic response of the upper structure differences dynamic characteristics can be drawn that better reflect the rigid foundation importation interaction with the dynamic response of the interaction contrast, draw some regularity. Finally, change some parameters of interaction analysis, summarize the results of some regularity.