The Whole Process Analysis On The Lateral-torsional Coupling Elastic-plastic Behavior Of Soil-eccentric Structure Interaction System

With the development of economic construction,there are many irregular buildings or complex structures were built.There is a considerable part of the building has a serious bias,the eccentric structure under the earthquake has a horizontal torsion coupling effect.In order to understand the regularity of the elastic plastic torsional coupling effect of the eccentric structure under strong earthquakes,in this paper,the analysis of the elastic and plastic response parameters of the SSI is carried out.Firstly,the analysis model of the eccentric structure system considering the interaction between soil and structure is established in this paper.The dynamic characteristic equation of the eccentric structure system of SSI is derived by the Lagrange energy method,and the dynamic characteristics of the eccentric structure system of SSI are obtained by the equation.Then the simplified method and process of upper structure are discussed in detail in this paper.In this paper,the structure of the eccentric structure is simplified as an analytical model of three lateral forces.In this paper,the interaction between foundation soil and foundation is simulated by ANSYS,and the constraint stiffness of soil is obtained.Then the paper discusses the process of Pushover analysis.The whole process loading analysis of the eccentric structure system considering SSI is carried out.The dynamic characteristics of the interaction system are obtained by the whole process loading analysis.Through the comparison of the SSI and the rigid foundation,the torsion effect of the structure is obtained by considering the weakening of SSI.In the end,the influence of eccentricity ratio and the ratio of torsion on the dynamic characteristics of the eccentric structure of SSI is studied.At the same time,the influence of the dynamic characteristics of the elastic and plastic soil on the dynamic characteristics of the system is analyzed.The variation of the dynamic characteristics of the eccentric structure system and the influence of the parameters on the adjustment of the system of the SSI is obtained.