Construction Control Analysis Of Curve Continuous Rigid Frame Bridge With High Pier And Long Span

In recent years, with the rapid development of traffic and continuous progress of bridge construction technology, the span of bridge construction is more and more big, the form of bridge structure is becoming increasingly complex. Long span curved continuous rigid frame bridge has become the more application because of its can be adapted to various terrain and shortening road-length. But as the coupling characteristics of bending moment, shear force and torsion moment makes the structure analysis becomes more complicated compared with the straight line bridge. Taking Gu Longshan bridge on the Chongzuo to Jingxi speedway in the Guangxi Zhuang Autonomous Region as the engineering background, the main research work is summarized as follows:First, summarizes the history of the curve bridges’development,the actual state, calculation method and importance of construction control;Second, due to the particularity of the bridge with high pier long side span and the traditional construction methods have their advantages and disadvantages; Therefore, it is used hanging basket with the beam bracket method to construction the edge span straight line segment, and, demonstrated the feasibility of the method through theory and construction method of comparative analysis; through the discussion on the construction technology and method to provide the reference to the same type;Third, Using the FEM software MDAS/Civil2012, considering curvature radius of influence, using the straight beam element instead of curved beam element method to establish the FEM model of Gu Longshan bridge and again analysis the line-type, according to the analysis results about the construction to get the pre-camber and pre-transverse;Fourth, comparative analysis of the measured value and theoretical value, shows that MIDAS/CIVIL can better simulation the process of bridge of cantilever construction and it is proved that the analysis theory, calculation method and calculation results can well reflect the engineering practice;Last, analyzed the influence of different parameters on the vertical deflection and lateral displacement of the bridge and provided the theoretical basis for the adjustment of the model parameters in the construction control.