| With the rapid development of the bridge engineering, the long span bridge is fastdeveloping quickly in China in recent years, and the long span continuous rigid frame bridgeis one of the most widely application bridge types. At the same time, our country ismuti-seismal, therefore, the bridge construct as the lifeline project, it is rather necessary to dothe aseismatic design and the evaluation for seismic behaviors. We must be able to find outcharacteristic in strong earthquake, the of the dynamic response and the impacts on seismicresponse by the cycle of free vibration and duration of the strong earthquake, and thecharacteristic is beneficial to understand the seismic response characteristics of such structureand improve the aseismatic capability.This paper introduces the basic theory of the seismic response analysis. It, taking theHongqi country Yellow River as the engineering project of the continuous rigid frame bridge,dose the seismic response analysis, time history analysis and static analysis. There are severalinvestigations in this text like below shown:Firstly, it analyzes the aseismetic design’s status and deficiency of the long spancontinuous rigid frame bridge at present, points out that seismic response analysis is essential;Second, it analyzes the Hongqi country bridge’s dynamic characteristic, then basis onearthquake intensity of the Hongqi country location area an the similarities and differences ofeach country’s criterion to the input of vertical earthquake, it does the spectrum responseanalysis and elastic time-history analysis respectively, comes out the conclusion thatearthquake input direction has an effect on the continuous rigid frame bridge’s calculationresult.Secondly, it introduces the application status and basic theory of the pushover analysismethod and evaluates the aseismatic capability of Hongqi country bridge. At last it analyzesthe difference among the existing load patterns and non-linearity analysis. These resultsprovide proof of reference of engineering anti seismic design. |
