Research On The Pushover Analysis In Building Structure

Pushover is used to assess the seismic performance of a nonlinear static analysis method. It combines the inelastic static analysis with the seismic response spectrum and avoids the time-costing process in nonlinear dynamic analysis. It's been proved by practical engineering abroad to have good accuracy and simplicity. It can save both financial cost and computational time. The study on this method has both the theoretic worthy and engineering worthy.Firstly, this paper discussed the nonlinear static analysis of the research and development status, theory foundation and the scope of application of static elastic-plasticity method analysis, and introduced present issue of pushover method remaining in fail to solving. This paper also introduced severy kinds of static elastic-plasticity analysis method which was representative, and compare their advantages and disadvantages.The horizontal loading model is very important to the static pushover analysis. The option of the horizontal load model will effect the result of static Pushover analysis directly. Through performing the static pushover analysis in 3-D to the tow frame structures, the author discussed three horizontal loading models. Comparing with the results of the time history analysis analysis, the author point out that how the three models effect the result of the static Pushover analysis.Asymmetric building is used inevitably in practical engineering. Irregular structure will have to reverse effect under the earthquake. In this paper, through performing the static Pushover analysis to a irregular structure from the opposite two loading directions, the author compare with result difference and discussed the application of pushover methord on irregular structure.