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《Urban Roads Bridges & Flood Control》 2017-12
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Analysis on Local Stress of Steel-concrete Combined Section of a Double-arch Pylon Cable-stayed Bridge

Ma Lei;  
In order to solve the stress performance of steel-concrete combined section of a double-arch pylon cable-stayed bridge, and according to the analysis on the stress performance, the conclusion provides a certain theoretical basis and technical support for this kind of bridge. Taking a double-arch pylon cable-stayed bridge as the engineering background, reasonably selecting a steel-concrete combined section,and through the large-sized general finite element analysis software ANSYS, the article simulates the construction process of this combined section, analyzes and summarizes the stress characteristic, change rule and force transferring route of internal components of this steel-concrete combined section. The analysis result shows that the mechanical property of the steel-concrete combined section of this double-arch pylon cable-stayed bridge basically meets the relative requirements and specifications, in which the local stress of steel structure is all less than 200 MPa. The larger tensile stress appears only at the combined position of top and anchor head of the concrete structure, and it is necessary to take the essential reinforcement measures in the construction process. The maximum stress of shear nail in the steel-concrete combined section is 73 k N and can meet the basic requirement of the relative specifications.
【CateGory Index】: U441
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