某高层结构风振与地震反应控制设计方案的对比分析

摘 要：针对某98.93m高层结构自身特点设计了三种减振控制方案，即方案一将阻尼器布置在结构顶部21~26层；方案二将阻尼器布置在结构中部12~14层；方案三将阻尼器布置在结构下部3~4层，并以所模拟的脉动风荷载时程及所选地震波作为动力荷载输入，对结构进行各方案下的风振和地震反应控制对比分析。结果表明，各方案下风振与地震输入能量可得到不同程度的耗散而衰减结构的风振与地震反应。在结构的风振控制方面，方案二对结构顶层加速度和侧移的最大控制效果分别达43%和44%，其总体控制效果稍优于方案一，显著优于方案三；在结构的地震控制方面，方案一与方案二对结构顶层侧移的控制效果相当，均在10%左右，方案三控制效果最小。对同时考虑风振与地震反应的高层结构控制设计，建议尽量将减振装置设置在结构的中上部楼层，以最小的投入达到最大的控制效果。

Comparative analysis of control plans against wind and earthquake for a high-rise building

Vibration control of a 98.93m high-rise building under wind and earthquake was studied here.Three vibration control schemes with nonlinear viscous dampers were proposed to control its structural dynamic responses under wind and earthquake excitations according to natural characteristics of the building.Dampers were installed in stories from 21st to 26th in scheme 1,from 12th to 14th in scheme 2 and from 3rd to 4th in scheme 3.The dynamic responses of the structure with the proposed control schemes under win...