Construction Simulation And Control Of High Pier Long-span Curve Continuous Rigid Frame Bridge

With the rapid development of traffic in China, to cloverleaf junction and trestle, especially mountain road in West-China, the axis of bridge has to is consistent with the road to give smooth traffic. So it is necessary to construct high pier curve bridge. The application to high pier curve bridge can reduce the length of the connection between bridge and road, is well obey the need of bridge address being limited by terrain and the object on ground and cut the complete project cost, moreover, it is helpful to improve the transportation capability of the whole highway system. So there is a good future. 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, especially to the curve bridge. The analysis to distortion and strain in plane is not complete. Some mechanism, for example, the factors which affecting strain in plane is in need of to discuss further. Many of simulation software make use of 2-D or 3-D beam element to model bridges, and few of them are special to the course of bridge construction. In the past few years, the calculation to the continuous rigid bridges has been laying in planar analysis, even if only doing a local analysis, for example, to No.O block or the local stress under anchor. It is enough to the straight continuous rigid bridges, but not enough to the curve continuous rigid bridges. 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 analysis to the whole structure. Based on current commercial software, this thesis brings forth the method that solid element is used to model bridge, and analyzes formulates which are used to model construction course in finite element method. A whole test bridge is analyzed with Bridge Three Dimensional Prestress Analysis System (BridgeKF). In course of this, the horizontal curve radius, pier height of the bridge model are changed to study the mechanics and strain characteristic of the different bridges, and a number of conclusions are drawn which can be used in many sides of bridge constructionand design.In the past few years, the construction method of cantilever has been widely taken. So the long-span curve bridge construction control techniques are expected to study and accumulate experience further. At present, the study to the theory of construction control is not enough, and method falls behind. Influencing factors have not been studied intensively, and construction datum cannot be forecasted and judged accurately yet. A set of complete construction control system has not been founded, especially to the high-pier long-span curve continuous rigid framebridge. This paper looks back long-span continuous rigid frame bridge construction control methods, expatiates the influencing factors during prestressed continuous rigid frame bridge construction control, and makes some new attempt at the test bridge, for example, setting radial and distortion camber to the superstructure, installing swing camber to the pier. Grey System Method and Duality Linear Regression, which are formed calculating programs with FORTRAN language, are applied in the construction control of the test bridge.