摘要
某办公塔楼建筑高度370m,采用带有腰桁架的钢框架-钢筋混凝土核心筒结构体系,通过在5个设备层设置环臂桁架式黏滞阻尼器构建结构减震体系。采用基于性能的结构减震设计方法,并运用ETABS和Perform-3D软件分别进行了多遇地震和罕遇地震下结构抗震性能分析,对比了设置黏滞阻尼器前后结构的减震效果。结果表明:多遇地震下,阻尼器提供的附加阻尼比为3.3%,结构位移减震率为10%;罕遇地震下,减震结构位移降低了10%,连梁的损伤状态得到了有效改善。采用ABAQUS软件进行了阻尼器连接支撑的实体有限元分析。结果表明,连接部位在阻尼器达到极限阻尼力时,最大应力低于材料的屈服强度,连接处于弹性状态。采用消能减震措施后,提升了结构的抗震韧性的同时节约了塔楼整体材料用量,实现了节材减碳的可持续目标。
The office tower has a building height of 370 meters and adopts a steel frame reinforced concrete core tube structural system with waist trusses.The structural damping system is constructed by installing ring arm truss type viscous dampers on five equipment levels.The performance-based structural seismic design method was used to analyze the seismic performance of structures under frequent and rare earthquakes using ETABS and Perform-3D software,respectively,and the seismic reduction effect of structure before and after the viscous dampers were compared.The results show that under frequent earthquakes,the additional damping ratio provided by the damper is 3.3%,and the structural displacement damping rate is 10%.Under rare earthquakes,the displacement of damping structures is reduced by 10%,and the damage state of connecting beams is effectively improved.The solid finite element analysis of damper connection support was conducted based on ABAQUS software.The results show that the maximum stress at the connection site is lower than the yield strength of the material when the damper reaches its ultimate damping force.After adopting energy dissipation and shock absorption measures,the seismic resilience of the structure is improved while saving the overall material consumption of the tower,achieving the sustainable goal of material conservation and carbon reduction.
作者
吴双兰
陈斯聪
胡大柱
WU Shuanglan;CHEN Sicong;HU Dazhu(Arup International Consults(Shanghai)Co.,Ltd.,Shanghai 200030,China;Shanghai Lanke Building Damping Technology Co.,Ltd.,Shanghai 200433,China)
出处
《建筑结构》
北大核心
2025年第23期89-97,共9页
Building Structure
关键词
超高层建筑
消能减震
黏滞阻尼器
减震率
附加阻尼比
super high-rise building
energy dissipation and shock absorption
viscous damper
shock absorption rate
additional damping ratio
