超高层巨型结构风振控制效果研究

Study on Wind-Induced Vibration Control of Mega Super-Tall Building

摘要: 基于大型通用有限元软件ANSYS建立了一个192 m超高层巨型结构的三维有限元模型，针对无控和有控(分别设置粘滞阻尼器和粘弹性阻尼器)两种情况，系统分析了超高层巨型结构在不同风压、风速角和控制装置等27种工况下的振动控制效果，研究了减振控制装置对结构顺风向侧移响应、构件剪力和弯矩响应及顶点峰值加速度响应的影响。研究结果表明，粘滞阻尼器和粘弹性阻尼器具有大量耗散风振输入能量、有效衰减结构动力响应、降低风振作用下结构层加速度和层间侧移沿高度方向突变的能力，能够降低风振作用下结构层加速度和层间侧移沿高度方向的突变，进而保证超高层巨型结构的安全、舒适使用性能。

Abstract: A three-dimensional mega super-tall building model with height of 192 m was built by ANSYS platform. Two kinds of damper equipments (viscous damper and viscoelastic damper) were selected and installed in the building so as to investigate the control effect of the structure in dynamic wind-induced vibration. Totally 27 analysis cases considering different basic wind pressures, wind directions and control equipments were conducted based on the finite element model of the building and control effect of structural displacement, internal force and top acceleration was studied and discussed in detail. The results show that velocity-dependent dampers can dissipate energy imported by wind, attenuate dynamic response, reduce mutation of story-acceleration response and inter-story displacement effectively. The vibration control technology provides a feasible and effective way of controlling wind-induced responses and safety and comfort of mega super-tall building can be improved and ensured.