| There are many mountains and valleys in the central and western regions of china.Because of the cable-stayed bridge has long span and beautiful shape, that we can use thecable-stayed bridge to across the ghlly. With the increase of span-length and height, the windeffects on these more flexible structures have not been confined to static wind loading, alsocause the wind-induced vibration of styucture. It is necessary to analysis on the wind-inducedvibration of cable-stayed bridge.This article based on Shennongxi birdge engineering project, has carried on the finiteelement simulation simulation analysis to this kind of bridge’s elegance buffeting response,and has carried on the analysis to several essential influencing factors. The prime task contentincludes:1)Considering the linear and nonlinear effects of structure with static wind load. To gainthe date of structural response of the bridge.2)Improved use of the harmonic synthesis, along with a high degree of change Simiuspectrum and Lumley-Panofsky spectrum as the goal of Xinjiang Bridge full-bridge windswere simulated, generating a bridge structure of discrete points of vertical and horizontalwind pulse of time.3)Carried on the simulation using the Davenport buffeting strength model and thepromoted Scanlan autoexcitation strength expression to the buffeting strength and the airoperated autoexcitation strength, and the overall evaluation structure’s geometrymisalignment, the host cable bridge tower wind load, the effective wind angle of attack’sinfluence, has obtained the bridge structure buffeting response result.4）Carried on the contrastive analysis to the above factor’s influence, has drawn severalconclusions: Shennongxi bridge has a better aerostatic stability, no aerostatic stability. Mainbeam’s amplitude is small in the bridge operation stage. Main beam’s displacementprobability of failure in the Standard Design Wind Speed is higher than the others at thelongest cantilever stage. |
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