Seismic Research Of Multi-layer And High-rise Steel Structure Based On The Pushover Method

With the proposal and development of the performance-based design theory,pushover analysis method has been widely caught interesting and attention in the earthquake engineering. Pushover analysis method is a static elasto-plastic method and has become an important structural seismic design and analysis method due to its practicality and simplicity. Pushover analysis method is gradually deemed to an important tool for the performance-based seismic design because it can get the strength and deformation when the structure is in nonlinear state and also find out the weakness of the structure.In this thesis, the development and current research situation,the theory foundation and the basic hypothesis of the pushover analysis method are first described.Then the pushover analysis method is adopted with the aid of the SAP2000 software to analyze the multi-layer and high-rise steel structure in small earthquake and rare earthquake.In the analysis various lateral loading patterns are considered and the corresponding results including the nonlinear top-story displacement, story displacement and the distribution of story drifts are obtained.Based on the obtained results the seismic resistance of the structure is evaluated and correction and reliability of the pushover analysis method are validated.The response spectrum analysis and the elasto-plastic time-history analysis are used to analyze the same structure models and obtain results.For supplying evidences to improve the research of pushover method's application,the results from the above three analysis methods are compired and pushover method's application in the seismic performance analysis of high-rise structure is discussed.