Research On Some Key Technologies Of En'shi Shizhou Big Bridge

According to some key technologies in design and construction of En'shi Shizhou Big Bridge, many methods about simulation analysis and study is applied in this paper.By utilizing the spatial finite element method, the elaborate structural simulation model is set up for the En'shi Shizhou Big Bridge. The entities calculation models are made up of the whole bridge model, the detail model of consolidation position between the beam and the tower and the detail model of the cable anchorage zone in the tower. It uses 3-D solid element to reinforced concrete and link element to pre-stressed steel and cable in the course of building model. The entity structure models overcome the shortcomings in the traditional analysis method based on some assumption and they are more close to the real structure.The whole bridge model is used to simulate the whole construction process of the En'shi Shizhou Big Bridge and calculate the stress and displacement of the bridge under some different construction conditions in the paper. The simulation of construction process can forecast the stress distribution of every section of the whole structure. So we can monitor the stress of week section in the whole construction process of the bridge. At the same time, the stress distribution drawing is drawn through calculating the detail model of consolidation position between the beam and the tower and the detail model of the cable anchorage zone in the tower. The results are very important and meaningful for the design, construction and construction control monitoring of this type of bridges in the future.The dynamic characteristics are analyzed and the seismic response spectrum analysis is done in the paper. So the evaluation of anti-seismic ability of the bridge can be done according to the results of finite element method and design conditions. Important members still keep in elastic state, and they can satisfy the requirements anti-seismic ability.