高层建筑设置黏滞阻尼器减振探讨

Analysis of vibration control by attached viscous dampers for the high-rise structure

沿海某高层建筑,其沿高度的结构布置形式比较特别,即下部为钢筋混凝土结构上部基本为钢结构,导致风荷载作用下上部有些楼层舒适度超标。本文基于该结构的特殊性,提出了基于风压时程下结构层间有害位移概念优化配置附加黏滞阻尼力,探讨了附加黏滞阻尼器减轻风振效果。分析表明,当主体结构满足了抗震设计基本指标要求后,在上部钢结构某些有害位移较大部分配置少量黏滞阻尼器就能有效减轻风振响应,同时在地震作用下也能起到一定的减震效果。

A high-rise structure located in coastal area,with a special structural arrangement combined with concrete structure in lower and steel structure in higher stories,could not satisfy the comfort requirements under the wind load. According to the particularity of the structure,the paper proposes the method for optimal allocation of viscous dampers based on harmful displacement and discusses the control effort of wind-induced vibration. It is proved that when the main structure meets the requirements of the basic indicators of seismic design,only arranging small amount of viscous dampers in the stories where harmful displacements are comparatively large can effectively reduce the wind-induced response,so that the structure can satisfy the relevant provision of comfort of high-rise apartment buildings in codes. Meanwhile the seismic performance is also improved.