摘要
武汉保利广场是由两栋高度不同的塔体组成的高位大跨连体复杂高层建筑,塔楼均采用"圆钢管混凝土柱+H型钢梁或钢桁架+钢筋混凝土核心筒"结构,连接体采用钢桁架结构。由于超高层核心筒完全偏置在一侧,为减小及控制扭转振动,除两端加密柱外,还设置了非线性粘滞阻尼器。在42.5m大跨连体主桁架中部,斜腹杆采用屈曲约束支撑(BRB),以使在大震下连体中部可以上下错动耗能,减小主体结构的扭转。动力弹塑性分析及振动台模型对比试验表明,粘滞阻尼器及BRB减震效果明显。另外,还介绍了大厅42.5m×55.9m单层索网幕墙设计及4层地下室"隔水-排水"抗浮设计等。
Wuhan Poly Plaza is a connected double-tower structure,each tower has different height and is consisted of concrete filled steel tubes with steel girders and concrete core walls,and the connecting structure with 42.5m span is made of steel trusses.Because the higher core tube completely offsets on one side,in order to reduce and control the torsion vibration,nonlinear fluid viscous dampers were setup in the structure.In the middle of connecting main truss,buckling restrained braces（BRB） were used as diagonals web members,which permit up-and-down deformation at the middle of the main trusses under seldomly occured earthquake,thereby reduce torsion of the main tower.The elastic-plastic time-history analysis and shaking table model tests show that BRB and viscous dampers absorb seismic energy effectively.The design of the sigle cable-net glass wall which is 42.5m wide and 55.9m high,and the design of drainage anti flosting were also introduced.
出处
《建筑结构》
CSCD
北大核心
2012年第12期1-7,25,共8页
Building Structure
关键词
超高层
连接体
粘滞阻尼器
混合减震
排水抗浮
单层索网幕墙
ultra-high rise building
connected structure
fluid viscous damper
mixed energy dissipation
drainage anti floating
sigle cable-net glass wall
