The Influence Research Of Support Cast-in-place Bracket Skewback To Arched Bridge's Stress

Chongqing shangTangkou Bridge on the Wujiang River is a main bridge with length 247.4 m, the main span is the 151.3m,which supported by cast-in-place bracket skewback reinforced concrete box arched bridge, the entire bridge modeling is succinct and artistic , such as a rainbow across the Wujiang River. Because this bridge uses the supported cast-in-place bracket skewback, it's stress is unique, the supported cast-in-place bracket skewback has the noticeable influence to arched bridge's static and the transverse stability.In a comprehensive summary arch (bridge) structure on the basis of relevant theories, as an example to Chongqing Tangkou Wujiang River Bridge, the use of finite element software MIDAS / CIVIL 2006 to establish space entity structure, we have carried on the static and the stable computation analysis to it though spatial three Collar (pole) the unit.1. using Large-scale of finite element software, to research mechanical modeling of the bridge and give reinforced concrete arch bridge finite element model2. To Study the reinforced concrete arch bridge static state mechanical properties and discuss the supported cast-in-place bracket skewback to the reinforced concrete arched bridge's internal force and the distortion influence, and analyze its influence reason.3. To research the stability of reinforced concrete arch space,and analysis the construction phase of the overall stability of the structure .To study its stable and distortion when we remove the supported cast-in-place bracket skewback and analyzes its influence reason4. Though the gathered stress and the distortion data, we carry on the analysis with the finite element model's computed result to compare.5. Through the finite element model analysis, and becomes the bridge stage on the support cast-in-place bracket skewback's supporting condition to this bridge in the construction stage the static and the overall stable influence launches the discussion and the research . this paper has given endogenic force and the distortion and the stable safety factor in the support change situationcontrol section, it had pointed out in the support change situation the remarkable influence stage and the reasonable range of variation to the support cast-in-place bracket skewback arched bridge endogenic force and the overall stability. And it has carried on the discussion to the support cast-in-place bracket skewback arched bridge's reasonable demolition support's time, it has certain reference value to the support cast-in-place bracket skewback system bridge design.