The Spatial Mechanical Analysis And Deformation Research On The Construction Of High Pier Long-span Curve Continuous Rigid Frame Bridge

With the rapid development of traffic in China especially the development of western area, a number of high standard mountain roads will be built in Southwest of China, which requires the axis of bridge to be consistent with the route demand that being line or curve in plane, using high pier in facade to span deep groove and give smooth traffic. So there is a good future for long span curve continuous rigid-frame bridge with high piers.Now the difference between China and other developed countries is notable in the construction of long span bridges. The design and construction method is still behindhand. It is for many years that the calculation to the continuous rigid bridges has been resting on planar analysis, even if only doing a local analysis, for example, to No.0 block or the local stress under anchor but seldom for full structural simulation analysis. At present, a few of cracks appear in some continuous rigid bridges which have been constructed, and one of the reasons must be the insufficient effect analysis of the whole structure.With the development of computer technology, finite element method has become mature in the application of the bridge calculation and analysis. Based on the past commercial software, this thesis brings forth the method that solid element is used to model the construction process of bridge, and analyzes the deformation problem in that process. Moreover, the result "research on the construction technology and design of long span curve bridge with high piers" that belongs to national western traffic science and technology projects is adopted, i.e. Bridge Three Dimensional Prestress Analysis System (BridgeKF), illustrating by a long span curve continuous rigid-frame bridge with high piers in Guizhou—zhuchanghe super bridge to conduct simulation analysis of whole structure construction. Moreover, it conducts simulation calculation from two aspects: firstly, change the plane curve radius of the constructed model with fixed pier height; secondly, change the pier height with fixed plane curve radius; analyzes the change rule produced under the situation of whole, No.0 block and high pier enforecement by the top structure with the variety of radius and pier height during the cantilever casting process of curve bridges and provides guiding principle for stess supervision through the construction process according to different situations; makes analysis on the change rule of the vertical deflection, transverse displacement, distortion of box girder and transverse displacement of high pier of the top structure with the vavriety of radius and pier height during the cantilever casting process of curve bridges. The common trend for curve bridges is that the vertical displacement...