Seismic Analysis And Design Of RC Curved Bridge

With the further development of the modern economy and the transportation infrastructure construction of the city, overpass bridges is increasing in the urban road network.In the construction of road and railway, a lot of curve bridges have been built in order to satisfy the linear or functional requirements. As the hub on the lifeline engineering, if the bridge incurred huge damage during the process of the earthquake, not only suffered great loss in economical, but also have a significant impact in the subsequent earthquake relief work because of disrupted traffic.Therefore, research the response rule of the bridge which under the seismic action has important theoretical value and engineering value as well as the seismic design theory and method of bridge.In this paper, seismic analysis and seismic design of the RC curved girder bridges will be conducted. The following results have been achieved:1、Establish space finite element model of the curve beam bridge using the general finite element program SAP2000. The internal components vulnerable force and displacement of the key parts of the curve beam bridge under earthquake action through vibration analysis and response spectrum analysis of the RC curved bridges,in order to provides data for the seismic design of RC curved bridges;2、Conduct the seismic design of RC curved bridges by the curve bridge seismic design method of United States of America and the current bridge seismic design code of domestic;3、Make research on seismic design method of RC curved bridges based on displacement, and make compared the analysis results based on displacement with seismic design results of the example bridge which has been completed.Through the study of the contents before, because of the space force characteristic, in the seismic design of RC curved bridges we need to pay attention to the interaction between the abutment, the strength and stiffness of pier, connection form of superstructure and substructure, calculation and selection of structure design data, etc. Considering the influence of other force and earthquake force direction and other factors on the part of the curve beam bridge and in the structure of the longitudinal and transverse seismic force input at the same time, especially when making the seismic design and analysis of small radius RC curved beam bridges.