【摘要】 天津现代城酒店塔楼建筑高度209m,建筑要求高度56m、平面长度65m的裙房结构和塔楼结构连为一体,中间不设置防震缝。酒店塔楼采用带加强层的钢筋混凝土框架-核心筒结构体系,为超B级高度超限高层。结构低区外框柱为型钢混凝土柱,核心筒低区采用了钢板混凝土组合剪力墙和带钢斜撑混凝土剪力墙。核心筒高宽比为20,因此为提高刚度设置两道加强层。中部设置伸臂桁架和环带桁架,建筑对与伸臂桁架相连的框架柱截面控制极严,因此伸臂桁架腹杆选用屈曲约束支撑;裙房部位为提高刚度,在不能设置剪力墙且抗侧支撑竖向不连续的情况下设置了屈曲约束支撑。高区设置环带桁架作为加强层,结构底部存在斜撑转换和搭接柱转换。系统介绍了该工程的结构体系特点、抗震性能化设计原则和方法、整体计算结果、罕遇地震作用下的弹塑性时程分析结果以及地基基础的设计。更多还原

【Abstract】 Tianjin Modern City Hotel tower is 209 meters high.In order to meet the functional requirements of the building,the skirt building which is 56 meters high and 65 meters length and tower structure are connected as a whole without setting seismic joints.Hotel tower is a high-rise building beyond code-specification of B-level height,and is frame-corewall reinforced concrete structure with the strengthened stories.Steel reinforced concrete(SRC) column,reinforced concrete(RC) shear walls with concealed SRC bracings and composite steel plate wall were used in low area of the structure.Two strengthened storeys were added for controlling the stiffness of the tower structure with the overall corewall aspect ratio of 20.A strengthened storey including structural steel outrigger trusses and belt trusses was set in the middle area of the tower,and the buckling-restrained-braces(BRB) were used for the web members of outrigger trusses,as the frame column section attached to outrigger trusses were strictly controlled.In order to enhance the torsion stiffness of annex structure,BRB were installed because there is no space for setting shear wall and lateral force resistance brace is discontinuous in the vertical.Another strengthened storey was set with steel belt trusses frames in the top of the building.The inclined column transfer joints and lapping column transfer joints were installed in the bottom area of the building.The structure characteristics,principles and methods of performance-based seismic design,overall calculation results,elasto-plastic time-history analysis results under rare earthquake and foundation design of the project were described systematically.更多还原