Analysis on Wind Resistance and Stability of Long-span Steel Tubular Arch Bridge in Steep Mountainous area During Cantilever Assembly Construction
The high wind speed in mountain passes is a great risk to the safety of bridge construction.On the background of a construction project of long-span concrete-filled steel tube arch bridge in a steep mountainous area,the influence of three components of static wind load on the structure under different wind speed conditions and the improving effect of wave wind cable on the stability of the structure are studied in the paper.In order to solve the problem of weak stiffness caused by the small initial tensile stress and large sag of the cable,the mechanical performance and stability of cantilever assembly of steel tubular arch bridge under different wind speed conditions are studied by modifying the elastic modulus of the cable using geometric nonlinear numerical analysis method.The analysis shows that the wave-wind cable with small initial cable force can effectively improve the wind resist-ance of the structure under higher wind speed.
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