Application Of Pushover Of Structural Analysis On Frame Structure

Pushover analysis method is static elasto-plastic analysis method of evaluating structural seismic performance, being more and more attention by its strong practical advantages. It has been included in China's"code for seismic design of buildings"as the method of the structure elastic-plastic deformation Checking. At present China has gradually wide application. It avoids the complicated nonlinear of dynamic analysis. It also has better accuracy. So study on the method has theoretical value, also hai projects worth.This paper first introduces the development and research status of Pushover analysis method, and expounds the advantages and shortage of this method. Then it discusses the calulation theory of Pushover analysis method, which it emphasis on the steps of Pushover analysis, including structural model building, modal analysis, the calulation method of horizontal seismic force, the choice of lateral load mode, doing Pushover analysis and building the structural capacity curve. The paper discusses Pushover analysis on different concrete frame structure, studying the effect of Pushover analysis result on the factors of the height, span and irregulatity of frame structure. By analysis the base shear and top displacement relationship, top displacement angle and Inter-story drift angle, we can see three factors are influential: it has the larger error of the higher and the larger impact of higher-order vibration mode building; it reduce error of the building of larger span by a variety of lateral load pattern; it must consider two directions of positive and negative of lateral load pattern on irregulatity structure, as complex irregulatity structure, it should Combine with other analytical methods.