Seismic Response Analysis And Seismic Measures Of Reinforced Concreted Arch Bridge Under Construction

Reinforced concrete arch bridge is one of the main bridge of highway bridge, theresearch on the seismic response of reinforced concrete arch bridge, the majority is for aspecific bridge into the state of the bridge seismic response analysis and vibrationcontrol study, the research on the seismic response analysis under construction is less.Taking yunnan liyuan bridge project as the background, using finite elementsoftware Midas Civil finite element models of each construction stage, using theresponse spectrum method and time history analysis method, seismic response analysisfor each construction stage. The main conclusions:①Displacement results of response spectrum analysis and time history analysisshow that the transverse bridge to inspire greater influence on the displacement ofstructure, the vertical excitation on the structure of the displacement effect is relativelysmall. Two kinds of calculation results of the displacement curve change rule is roughlysame, but the displacement results is greater than the displacement response spectrum.②Different direction of the incentive have different effects on structural internalforce，internal force of different parts of the change trend is not unified. Two methods ofanalysis results of the internal force curve change rule is roughly the same, and the timehistory analysis results of the internal force is on the high side. The maximum value ofinternal force of two kinds of analysis method are appeared in the arch springingsection.③Under earthquake load, Construction the third columns in sequence from thearch springing section to the arch crown section in sequence,the maximum tensilestress in arch springing section④The basic box hoisting stage, increase the wire in a reasonable position canoptimize the stress of the structure.⑤Under the action of earthquake, the adjustment of the post construction sequencecan improve the stress of the structure of main arch key section.