某高层钢框架结构组合减震设计  

Combined damping design of a high-rise steel frame structure

作　　者：纪晗[1] 沈伟 敖晓钦[1] 潘召辉 万建涛 柳子通 JI Han;SHEN Wei;AO Xiaoqin;PAN Zhaohui;WAN Jiantao;LIU Zitong(Central-South Architectural Design Institute Co.,Ltd.,Wuhan 430071,China;China IPPR International Engineering Co.,Ltd.,Beijing 100089,China)

机构地区：[1]中南建筑设计院股份有限公司,武汉430071 [2]中国中元国际工程有限公司,北京100089

出　　处：《建筑结构》2024年第17期112-117,共6页Building Structure

摘　　要：某转化医学中心位于高烈度设防地区、地震重点监视防御区,从减震效果和经济性等方面对不同减震方案进行比选后,选用BRB+VFD组合减震方案,同时提出了阻尼器布置原则。采用有限元法进行弹性和弹塑性时程分析,结果表明BRB+VFD组合减震方案可为主体结构提供一定的附加刚度和附加阻尼比,降低地震作用下基底剪力,延缓主体结构破坏,满足主体结构第二道防线设计要求;VFD在多遇地震、设防地震、罕遇地震作用下均发挥耗能作用;BRB在多遇地震作用下仅提供刚度,在设防地震和罕遇地震作用下进入屈服耗能,提高了结构抗震性能;随着地震烈度的增加,结构附加阻尼比随之增大,有效保证了结构抗震性能。A translational medical center is located in the high intensity fortification area and the earthquake key monitoring and defense area.After comparing and selecting different damping schemes from the aspects of damping effect and economy,the combined damping scheme of BRB+VFD was selected,and the principle of damper layout was put forward.The finite element method was used to analyze the elastic and elastic-plastic time history.The results show that the BRB+VFD combined damping scheme can provide certain additional stiffness and additional damping ratio for the main structure,reduce the base shear force under earthquake,delay the damage of the main structure,and meet the design requirements of the second defense line of the main structure.VFD plays a role in energy dissipation under the action of small earthquakes,moderate earthquakes and large earthquakes.BRB only provides stiffness under small earthquakes,and enters yield energy dissipation under medium and large earthquakes,which improves the seismic performance of the structure.With the increase of seismic intensity,the additional damping ratio of the structure increases,which effectively guarantees the seismic performance of the structure.

关 键 词：组合减震 黏滞阻尼器 屈曲约束支撑 钢框架 附加阻尼比 

分 类 号：TU391[建筑科学—结构工程]