1. Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
2. Engineering Structure and New Materials Research Center of Beijing higher education institutions, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
3. State Key Laboratory of Disaster Prevention in Civil Engineering, Tongji University, Shanghai 200092, China;
4. Beijing Collaborative Innovation Center for Technology of Energy Saving and Emission Reduction, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
Abstract：In this paper, several typical numerical simulation methods for urban bridge abutment, such as simplified abutment model, spring abutment model and elastic beam element abutment model, were introduced firstly. Then, the numerical model of different degree of refinement considering the soilabutmentsuperstructure interaction was established with the background of an overpass curved bridge. The nonlinear dynamic timehistory response analysis under the condition of artificial ground motion was carried out and the calculation errors of different numerical models were compared and analyzed; The variation of bridge internal radius, the internal force of pier bottom, the relative displacement of pier and beam, and the relative displacement of bridge girder were discussed. The results show that the simulation response of the bridge abutment can be more accurately reflected by the improvement of the simulation precision of the soilabutmentsuperstructure interactions; especially the elastic beam element abutment model can comprehensively consider the dynamic response of abutment. Considering the soilabutmentsuperstructure interactions, the smaller the radius of curvature, the greater the lateral force and displacement of the piers.
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