四川合江一桥的拱肋吊装采用扣塔斜拉扣挂施工,扣塔高144.91m,风荷载是结构的重要控制荷载。采用谐波叠加法模拟作用于扣塔上的脉动风速、脉动风压、脉动风荷载时程曲线。把扣塔简化为二维串联多自由度动力学模型。采用ANSYS瞬态动力学分析模块,计算扣塔风振响应,为风振控制提供依据。 The arch rib hoisting of a bridge at Hejiang Bridge in Sichuan Province adopts the buckling and buckling construction of the buckle tower. The buckle tower is 144.91m high, and the wind load is an important control load of the structure. Harmonic superimposed method is used to simulate the fluctuating wind speed, fluctuating wind pressure and fluctuating wind load time history curve on the buckle tower. The buckle tower is reduced to a two-dimensional tandem multi-degree-of-freedom dynamics model. ANSYS transient dynamics analysis module is used to calculate the buckling tower wind response to provide the basis for wind vibration control.