Improved Pushover Analysis Applied On Edong Yangtze River Bridge Of Seismic Response

The paper is accord to the current development status of pushover analysis at home and abroad,based on its theory and traditional mature pushover analysis method,improving the load loading mode of pushover analysis method which is based on the traditional analysis with modal load loading mode.It is main to consider the displacement and basel shear of the pier and cable tower when do the analysis of seismic response of the bridge.The demand spectrum curves are according to the selected Seismic waves which are Wenchuan seismic waves, Artificial seismic waves, EI-Centro seismic waves that are on behalf of the big,medium and small earthquakes, when under the different earthquake intensities,the component of the structure will show different properties which may be at the elastic state or the plastic state.The selected seismic waves could make the structure present these attributes that cover the the elastic and plastic state.At the same time,in order to verificat the results of the improved pushover analysis,the paper select a traditional load loading mode-Inverted triangle form of load loading mode.Whether the results of pushover analysis are accurate or not is compered with the results of time history analysis and also can find out the advantage of pushover analysis. It hopes to seek a both effective and simple method and discuss the applicability in high mode when study the improved pushover analysis.