Six Red River Cable-stayed Bridge Overall Performance Of The Girders, Towers Of Local Performance

This paper is based on Liu Chonghe Bridge(195+438+195)m-prestressed concrete of cable-stayed bridge that is being built in Guizhou, on the basis of its construction necessity, the author uses the large finite element software in order to analyze the Static, stable and the seismic performance of the concrete main beam cable-stayed bridge systematically, do deep research of the Pylon rib plate stress field and the shear lag effect as well. The main work and achievements are as follows:1. Use the Large bridges and mechanical analysis software respectively, establish the finite element model of the bridge in different element types, the tower of stress and the shear lag analysis of the local analysis model. The result of model has been printed for each other, meanwhile, effect and operate the reliability of finite element model with all the dynamics2. Based on the results of the analysis of construction dynamics, the author entirely evaluates the design structure according to the Specifications Of The existing highway bridge design, for proving the rationality of the design.3. Analyzes the stability of the bridge according to the the first stability, the author finishes the time-procedure analysis under the seismic load-E1 in the meantime, and the result shows:the bridge is in excellently stable and the seismic performance4. On the basis of strategies on section models and solid elements, select one standard unit of the bridge tower and do spatial simulation, then through analyzing concrete's stress state in anchorage zone in different situations, get the rationality when U-shaped circular prestressing system is placed here.5. Discover deeply the pass of the Rib plate girder shear lag effect, the effective width coefficient and cable force(1)Caculate the stress distribution of each typical cross-section in the dead load and full load condition across the bridge panel fabric, subsequently draw Shear-lag factorbridge deck of the bridge deck under the Constant Load as 1.036-1.348, the value of the Effective width coefficient 77 is from 0.731 to 0.964 correspondingly(2)Exert the approach of the Vertical cable force to explore the horizontal component of cable of the bridge deck in the segment model, and the result shows:the diffusion angle of the Horizontal component of the vertical cable force is about to 30.7°...