Effects Of Ground Motion Displacement On Seismic Responses Of Frame Structure

Because of earthquakes occurred more and more frequently, a large number ofcasualties and property losses．Ground motion is a major reason to structure damageand collapse. The most concerned problem in construction engineering is how tomitigate damage caused by earthquake. During seismic design, the time historymethod has been widely used. With the first earthquake time history recordedsuccessfully，the research of ground motion has made some achievements and keepsimproving day by day. The characteristics of ground motion display immenseuncertainties, so the response of the same structure are sometimes very distinct whenunder different time history puts. And the structure designer facing the problem thathow to choose the best time history record.Structural form is varied. In this paper, we take the frame structure for example,and regarded displacement response as the main research object which had controlaction on the collapse of structure. Study on the effect of peak ground motiondisplacement on the displacement response of frame structure in the case of the peakground motion acceleration and peak ground motion velocity was similar in eachgroup respectively. The main contents of this study consist of the following: firstintroduced the characteristic of ground motion. Then investigated the developmentprocess of seismic response calculation method, and introduced the restoring forcemodel which commonly used in nonlinear computation. Finally, building a six-storyframe structure FEM model by using OpenSees. The used artificial ground motiontime history was fitted code response spectrum. Pick out five group time history asputs, from which peak ground motion acceleration and peak ground motion velocitywas similar in each group respectively but peak ground motion displacement weredifferent. Study on the response of top displacement and inter-story displacementangle under the elastic and elastic-plastic stage. Get relevant conclusions through theanalysis and comparison of the results. Provide reference for the time history selection problem in practical engineering.