结合工程实例的扣塔脉动风荷载模拟及风振响应分析  

Simulation of Fluctuating Wind Load and Analysis of Wind-induced Vibration Response about Buckle Tower

作　　者：汪瑞[1] 李金华[1] 

机构地区：[1]安徽省建设工程勘察设计院,合肥230001

出　　处：《特种结构》2012年第4期124-127,5,共4页Special Structures

摘　　要：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。For an arch bridge over Yangtze River in Hejiang,Sichuan,the cable-stayed method with buckle tower is used in the installation of main spans arch ribs,the height of buckle tower is 144.91m.Wind load is an important control load for the tower structure.CAWS（Constant Amplitude Wave Superposition）is employed to simlulate the time history of fluctuating wind velocity,fluctuating wind pressure and fluctuating wind load.The buckle tower is simplified as two-dimensional lumped mass model.Then,the wind-induced vibration response of buckle tower is calculated based on the transient dynamic module of ANSYS,which would provide basis for the wind-induced vibration control.

关 键 词：扣塔 谐波叠加法(CAWS) 瞬态动力学分析 风振响应 风振控制 

分 类 号：TU312.1[建筑科学—结构工程]