Study On Mechanical Properties Of The Single Tower Prestressed Concrete Cable-stayed Bridge Based On Different Construction Programs

The single tower cable-stayed bridge plays an increasingly important position in the cityThe single tower cable-stayed bridge plays an increasingly important position in the citybridge for its beautiful appearance, novel structure and excellent spanning capacity. Thecable-stayed bridge has an indeterminate structure with high degrees, and the structureanalysis of the cable-stayed bridge is complicated. Its construction method is closely relatedto the internal forces and deformation of the bridge.Take the construction project of Shi Hezi Xiyi Road Viaduct for example, this paper firstintroduces the overview of the development of the modern cable-stayed bridge, the structuralsystems and structural performance of modern cable-stayed bridge, and the analyticalmethods of cable-stayed bridge. Then, according to the comprehensive requirements of thenatural environment, geographical environment, climatic conditions, schedule requirements,based on the construction site, four different construction schemes which appropriatecombination of full framing casting construction and construction of hanging basket wereprepared. Based on dedicated procedures of bridge analysis and calculation, a simulation onthe girder, tower and cables was run, and the full-bridge finite element model was established.Aiming at the different construction schemes, this thesis analysis and evaluate theinfluence on the different construction schemes on single tower cable-stayed bridge concretemechanics performance. After running the whole construction process analysis, this thesisdetermined the reasonable construction steps, the reasonable construction program of cableforce, and the appropriate elevation of formwork. Take the cable force, the upper and lowerstress in main girder and the main beam linear of the different stages of the constructionprocess and the bridge state as target parameters. Through the comparison of the differentconstruction schemes, this thesis applies bridge construction process optimization analysis toensure the structure linear and internal forces on the bridge state approximate the design targetstate. The research results can be taken as a reference for the design and construction controlof cable-stayed bridge.