采用粘滞阻尼器对曲线型框架结构附加阻尼比计算研究

Study on the calculation of additional damping ratio of curved frame structures using viscous dampers

在对曲线型框架结构进行减震设计时,由于曲线型框架结构会因为受力不均,某些构件会在地震作用下产生较大的破坏。基于云南地震高烈度区某曲线型框架结构附加粘滞阻尼器进行减震设计,借助于有限元分析软件SAP2000进行多遇、罕遇地震作用分析计算。计算结果表明:附加粘滞阻尼器后,多遇地震作用下楼层基底剪力能降低15%~25%左右,楼层层间位移角满足减震目标;罕遇地震作用下,顶点时程位移能降低25%左右,且粘滞阻尼器滞回曲线饱满。

Certain components will cause greater damage under the action of the earthquake because of the uneven force of the curved frame structure.This article is based on the seismic design of a curvilinear frame structure with viscous dampers in Yunnan high earthquake intensity area.Analysis and calculation of frequent and rare earthquakes are carried out using the finite element analysis software SAP2000.The calculation results show that with the addition of viscous dampers, the floor base shear force can be reduced by about 15% to 25% under frequent earthquakes, and the displacement angle between floors can meet the seismic reduction target;the top time history displacement can be reduced about 25% under rare earthquakes, and the hysteresis curve of the viscous damper is full.