Pushover Analysis Of Soil-Pile-ECO-Composite Walls Interaction System

The ECO- Composite wall structure is a kind of new-type building structure system of energy-saving insulation, energy dissipation damping, and construction fast, economic and practical, the development foreground is also very wide. The earthquake is one of the worst natural disasters the human faced, also it is a research topic concerned by the researchers in the structural seismic theory analysis and design method has been for earthquake engineering. At present, the research of seismic performance of the ecological compound wall structure is built on the rigid foundation, to calculate the upper model and bottom pile foundation model separately, and to pushover analysis under the static elastic-plastic state. But in practical project, the dynamic interaction between upper structure and the soil has a big effect to the whole structure seismic response. Therefore this paper combining the pile foundation model and the upper structure simplified model to establish the numerical analysis model of soil pile ecological composite wall structure, to discuss under the different seismic intensity, the difference of structural responses between soil pile ecological composite wall structure interaction system and rigid foundation conditions. The main research contents summarized as follows:1,According to the research topic contents and the status, to describe the basic principle of pushover method, lateral loading mode and implementation step, and to discuss several key problems of the Soil and structure interactions such as the research methods, analysis model and theoretical achievements. It can be seen that for complex ecological compound wall structure, it is more effectively to evaluation the seismic performance of whole structure of comprehensive the both methods. 2,Through the research of simplified calculation model of the pile, it can be get the m method foundation model based on Winkler applicable to the structure system. According to the mechanical characteristics of the ecological compound wall structure, be going to simplified to the upper structure as equivalent frame-diagonal strut model, and to test and verify the model of pushover. The result shows that: pushover analysis methods and equivalent slant supports model are feasible to ecological compound wall structure. At last the numerical analysis model of soil pile composite wall structure ecological has be established.3,According to the basic idea of the capacity spectrum method and using finite element analysis software SAP2000 to establish 10 layers analysis models of ecological compound wall structure with pile foundation and the corresponding rigid foundation respectively, and to pushover analysis on the plane static elastoplasticity, to discusses under the different seismic intensity (7 degrees, 8 degrees and 9 degrees), the difference of structural responses between soil pile ecological composite wall structure interaction system and rigid foundation conditions. Through the comparative analysis of soil and structure it can be get: the dynamic interaction between the soil and the structural has a major impact on earthquake response on the analysis of the ecological compound wall structure system.