某复杂超限高层建筑悬挂结构设计  

Design on suspension structure of a complex out-of-code high-rise building

作　　者：王昕 李保忠 叶小萍 摇铖 WANG Xin;LI Baozhong;YE Xiaoping;YAO Cheng(gad·Zhejiang Greenton Architectural Design Co.,Ltd.,Hangzhou 310007,China)

机构地区：[1]gad杰地设计·浙江绿城建筑设计有限公司,杭州310007

出　　处：《建筑结构》2022年第19期35-40,共6页Building Structure

摘　　要：某22层超限高层西北角设置通高中庭,4层以上除20层外中庭部分均无楼板,同时为追求立面通透效果,角部不设外框柱,中庭两侧外框柱采用带折角的斜柱,中庭楼面和幕墙均采用悬挂结构,其中楼面采用上端位于屋顶悬挑桁架和斜柱的高强钢拉索进行悬挂,幕墙采用悬挂于屋顶桁架以及楼面钢梁上的竖向龙骨承担自重。设计时需考虑悬挂结构的竖向和水平传力路径、施工顺序对拉索受力的影响、悬挂节点设计兼具安全与美观、提高悬挂结构安全冗余度等关键点,针对上述关键点进行了结构性能设计、拉索抗侧力非线性分析、拉索施工模拟等,根据分析结果提出了加强措施,并结合受力、外观和施工等多方面因素,对拉索悬挂节点设计进行了多方案比选,最终采用联合式耳板连接节点,取得了良好的设计效果。Tall atrium was arranged in northwest corner of a 22 stories out-of-code high-rise building, there are no floors in the atrium except for the 20 th floor above the 4 th floor. At the same time, outer frame columns was removed at the corners in order to pursue the transparent effect of the fa9 ade, the outer frame columns on both sides of the atrium adopt inclined columns with angulation, suspended structures are applied to the floor and curtain wall system of the atrium. The floor system is suspended by high strength steel cables from cantilever trusses on the roof and inclined columns, and the curtain wall system are suspended by vertical keels which hung onto roof trusses and floor steel beams. In the design, it is necessary to consider key points such as the vertical and horizontal force transmission paths of the suspension structure, the influence of the construction sequence on the force of the cables, the design of the suspension joints with regard to safety and beauty, and the improvement of the safety redundancy of the suspension structure. Structural performance design, nonlinear analysis of cable resistance to lateral force, and cable construction simulation were carried out for the above design key points. Based on the results of the analysis, the strengthening measures were proposed. Combined with factors such as force, appearance and construction, a multi-plan comparison was made for the design of the cable suspension joint. Eventually combined ear plate connection joint was selected and good design effect of the building was achieved.

关 键 词：超限结构 高层建筑 悬挂结构 钢拉索 施工顺序 悬挂节点 连接节点 

分 类 号：TU318[建筑科学—结构工程]