带有液体粘滞阻尼器的超高层建筑抗风设计及风振响应分析

Wind resistance design and wind vibration response analysis of supertall buildings with viscous dampers

超高层建筑遮挡物较少,在风荷载作用下,结构顶部强烈的风振加速度会引起人的不适。通过在超高层结构合理布置液体粘滞阻尼器增加结构阻尼比,从而有效控制结构风振响应,达到减振目的。以珠海某超高层工程实例为背景,采用风洞试验计算脉动风荷载时程,在最不利风向角风荷载时程作用下,对比分析了阻尼器不同楼层布置位置、不同平面布置位置、不同阻尼弹簧刚度及不同阻尼参数下的减振效果,选出最合理阻尼器布置方式,结构顶层风振加速度得到有效控制,减振效果明显。

Super high-rise buildings have less shelter,and under the action of wind loads,the strong wind vibration acceleration at the top of the structure will cause human discomfort.By rationally arranging the liquid viscous damper in the super high-rise structure,the structural damping ratio is increased,so as to effectively control the wind vibration response of the structure and achieve the purpose of vibration reduction.Taking a super high-rise project example in zhuhai as the background,the wind tunnel test is used to calculate the pulsating wind load time course,and under the action of the most unfavorable wind direction angle wind load time course,the damping effect under different floor layout positions,different plane layout positions,different damping spring stiffness and different damping parameters of the damper is compared and analyzed,and the most reasonable damper arrangement method is selected,and the wind vibration acceleration of the top layer of the structure is effectively controlled,and the vibration damping effect is obvious.