线性粘滞阻尼器布置方案对框架结构地震反应的影响

On the Effect of the Layout Scheme of Linear Viscous Dampers on the Seismic Response of the Frame Structure

为研究线性粘滞阻尼耗能框架的地震反应,采用SAP2000分析了一座10层框架结构安装线性粘滞阻尼器之后,在地震作用下的地震反应。考虑了五种不同的阻尼器布置方案,其中三种方案为对称布置,但阻尼器布置位置不同;两种方案为非对称布置,且其中一种方案只在结构一侧布置阻尼器,由此探讨了阻尼器布置方式对框架结构地震响应的影响。可得对称布置方案结构各楼层减震效果良好,并且三种布置方案地震反应和减震效果基本相同;非对称布置方案相对前三种布置方案减震效果较差,这是由于阻尼器布置不对称,使结构产生了扭转,增大结构地震反应。因而阻尼器应在结构中灵活对称布置,不宜采用非对称形式布置。

In order to study the seismic response of the frame structure w ith linear viscous dam pers,the SAP2000 is used for analyzingthe seismic response of a 10-storey frame structure w ith linear viscous dampers under the action of an earthquake in thepaper. Five different layout schemes are considered for the layout of linear viscous dam pers, in three of which the viscous dam persare symmetrically arranged but are placed in different positions,in two of which the viscous dampers are asymmetrically arranged,and in one of which the linear viscous dampers are arranged on only one side of the frame stru cture, upon the basis ofwhich the effects of different layouts of the linear viscous dampers on the seismic response of the frame structure under the actionof an earthquake are explored in the paper. It is found that w ith the sym metrical layout schem es,the damping effect of eachfloor is good,and the effects of the seismic response and the shock absorption are fundam entally the sam e; w ith the asymmetriclayout schem es,the damping effect is poor compared w ith that of the previous three layout scheme because of the asymmetriclayout of the linear viscous dam pers, which results in the torsion of the frame stru ctu re, w ith the seismic response of the framestructure increased. As a resu lt, dampers should be flexibly and symmetrically laid out in the frame stru ctu re, and it is not suitableto lay out viscous dampers in an asymmetrical way.