摘要
昆明开发银行办公楼处于高烈度区,且建筑平面为"凹"形,对结构抗震不利,钢框架及钢框架—支撑结构体系不能满足设计要求。为改善结构的抗震性能,采用了钢框架+防屈曲耗能支撑+黏滞阻尼器的混合减震结构体系,实现了各地震作用下设定的抗震设计性能目标。该混合减震结构的减震特点是在小震时,防屈曲支撑处于弹性变形阶段,以黏滞阻尼器耗能为主;在中震时,部分防屈曲耗能支撑开始耗能,黏滞阻尼器的阻尼力仍随速度增长而变大,黏滞阻尼器与防屈曲耗能支撑都对结构进行耗能减震;在大震时,大部分防屈曲耗能支撑发挥耗能作用,形成饱满的耗能滞回曲线,对结构的整体耗能占主导作用。
Kunming Development Bank Office building is in a high-intensity area. The ＂ 凹＂ shape of the construction plane is unfavorable to seismic, and the steel frame and steel braced frame structure system can not meet the design requirements. In order to improve the seismic performance of the structure, the new steel frame with mix-dissipation technology for adding Buckling-Resistant Braces （BRB） and fluid viscous dampers is used to achieve the setting seismic design performance objectives under different earthquake intensity. The damping characteristic of this new structure is that： under frequent earthquake, BRB is still in elastic deformation stage, so fluid viscous dampers are the main dissipative energy in the system; under moderate earthquake, some BRBs began to play the role of energy consumption, viscous damping force of the fluid viscous dampers still increase with the increase of the velocity rapidly, and both fluid viscous dampers and BRB play roles for the structure of seismic energy dissipation; under rare earthquake, most of BRBs enter the yield phase, and form full of energy dissipation hysteresis curve. The BRB plays a dominant role in the structure for energy consumption.
作者
陈焰周
申涛
李霆
李战利
Chen Yan-zhou Shen Tao Li Ting Li Zhan-li(Central South Architectural Design Institute Co. Ltd, Wuhan 4.30071 , China)
出处
《工程抗震与加固改造》
北大核心
2017年第4期18-25,共8页
Earthquake Resistant Engineering and Retrofitting
关键词
防屈曲耗能支撑
黏滞阻尼器
抗震性能
混合减震
buckling resistant braces（BRB）
fluid viscous damper
seismic performance
mixed dissipation
