| The reinforced concrete top-bear box arch bridges are used widely in our country,specially in the southwest.But looking over the references of the recent years,we find that the analysis of seismic response of this kind bridges were relatively deficient.according to the study situation of seismic response of the top-bear arch bridges,This paper research the features of the seismic response of this kind bridges in the following several aspects:1,The papers of the analysis of seismic response of the arch bridges in the past base on one actual project and carry on the simple analysis. They neglect to study the parameters of the arch bridge. In the view of this situation,This paper calculate the difference of the seismic internal force of the arch, And obtains some rules through changed the span-ratio and arch-axis coefficient.This study has some value of reference in the seismic response of the arch bridges.2,The structural analysis model of seismic response of a top-bear arch bridge is important and the different models influence the result very seriously. In the past, because of the analyzes tool's limition, the bare arch structural analysis models with the quality of arches constructs is use in the seismic response of the arch bridges. In recent years, the analyzes tools develop and the entire bridge structural analysis models are used. The study of the difference of the two models lacks. This paper calculate and obtains the difference of the seismic internal force of the arch in two models.and discovery that the results have big difference. The findings indicated that we need to use the entire bridge in the seismic response of the arch bridges.3,Ground Motion Input for the seismic response of the arch bridges is complex. The difference ground motion input have the different of the seismic internal force of the arch. This paper study the vertical of the bridge's earthquake response in seven different ground motion input modes. The findings indicated that regarding the great span arched bridge, Inputting the response spectrum along longitudinal, crosswise, vertical of the bridge and calculatting this bridge's earthquake response is good at unidirectional and two approach the input.and the vertical seismic response enlarged the force of the arch and must be considered of.4,The effects of traveling wave to seismic response of the great span arched bridge is evident. This conclusion in the references come from the study of the specific structures and ground motion input parameters. Whether or not the conclusion suitable for other occasions, we need to further research. For this reason,This paper calculate and obtains the difference of the seismic internal force of the arch,by changing the shear wave velocity,and selecting the real seismic wave and the synthetic seismic wave,which associated with the response spectrum.5,the seismic waves , except satisfies the location and the ground motion's duration and peak-to-peak value, but also consider the spectrum characteristics and the structure of the vibration characteristics we want that spectral characteristics of seismic waves can make the structure Response. For this reason, in the dynamic time analysis and the analysis of traveling wave effect,This paper consider spectrum characteristics to at bearing the influences of arched bridges,throughcomparisoning the synthetic seismic wave with the El-CENTRO seismic wave of revision.6,The study on soil-pile-structure is very complicated and hot.Simultaneously ,we Have got many kinds of simple calculation models too.How much of the difference of the seismic internal force of the arch in the different simplified calculation models has less Researching at present. For this reason,This paper sets up five kinds of soil-pile-structure models and discusses the difference among the rigidity of bottom, the rigidity of the side and the consolidation of bottom,at last , compares with the the characteristics of dynamics, the seismic internal force and displacement of the arch of the five models.
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