The Seismic Response Analysis Of Irregular Steel Frame Structure

With the rapid development of the city and the urgent need of land, the form of the building has gradually developed into the air and the underground. Innovation was encouraged by diversification of people's aesthetic concepts to architect a better architectural forms. And the continuous development of the theory and construction technology gradually increase makes many complex high-rise building design and construction came ture. For the vertical irregular structure and serious damage and complexity of its structure, the seismic analysis is particularly important.A vertically irregular steel frame building is carried on in this paper about the seismic performance analysis. First it introduces the concept of earthquake hazards, steel structure,irregular structure classification and its research status at home and abroad. Then the model is established by the finite element analysis software SAP2000 to do research on the seismic behavior of the structure, response spectrum analysis and linear time history analysis.Finally we carry on the pushover analysis to do the research.The main contents are as follows:(1)we use modal analysis of the model to obtain the vibration period and the quality of the data and other factors.(2) Conducting spectrum analysis of the three group's structure models under one-way seismic response, calculating inter-story displacement angle through structure floor displacement analysis, we can determine seismic performance of the structure.(3) Using three kinds of seismic waves on the three group model of linear time history analysis, we can find out the weak layer through the response under earthquake.(4) Using Pushover analysis of the structure, the capacity spectrum and demand spectrum curve of plastic hinge under different earthquake action development status can be got.(Code:KJ2014ZD07)...