某超限高层办公楼结构设计
摘要：某超限高层办公楼采用钢管混凝土叠合柱框架-钢筋混凝土核心筒-伸臂桁架结构体系。地处较高烈度区的Ⅳ类场地，存在高度超限、构件间断、承载力突变、局部穿层柱等不规则项，属于超限高层建筑。结构设计过程中进行了小震弹性分析和大震动力弹塑性分析，针对结构的薄弱部位采取了一系列有效的加强措施。采用基于性能的设计方法进行结构抗震设计，可以实现预期的D级抗震性能目标。同时还对框架柱的选型进行了比对分析，对外围框架柱与核心筒的竖向变形进行了施工模拟分析，对加强层伸臂桁架节点进行了有限元分析，分析结果表明：结构安全可靠，满足预设的性能目标。
关键词：超限高层建筑，钢管混凝土叠合柱，加强层，伸臂桁架，节点分析，竖向变形差；抗震性能设计
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[2] 超限高层建筑工程抗震设防专项审查技术要点：建质[2015]67号[A].北京：中华人民共和国住房和城乡建设部，2015.
[3] 钢管混凝土叠合柱结构技术规程：CECS 188—2005[S].北京：中国计划出版社，2005.
[4] 钱稼茹，江枣.钢管混凝土组合柱轴心受压承载力计算方法[J].工程力学，2011,28(4):49-57.
[5] 建筑抗震设计规范：GB 50011—2010[S].2016年版.北京：中国建筑工业出版社，2016.
[6] 钱稼茹，康洪震.钢管高强混凝土组合柱抗震性能试验研究[J].建筑结构学报，2009,30(4):85-93.
[7] 黄登，黄远，陈桂榕，等.钢管混凝土叠合柱受力性能研究[J].地震工程与工程振动，2017,37(4):129-137.
[8] 于德湖，王春晖.基于ABAQUS的半通缝连梁恢复力模型[J].世界地震工程，2017,33(2):89-96.
[9] 苑会杰，马锦姝，王泽强，等.超高层结构竖向变形与伸臂桁架安装控制方法研究[J].建筑结构，2018,48(23):66-71.
Structure design of an out-of-code high-rise office building
Abstract: Structural system of steel tube-reinforced concrete column frame and reinforced concrete core tube and outriggers were adopted. It is located in the Ⅳ-class site of higher intensity, with irregular items such as height exceeding, component discontinuity, abrupt change of bearing capacity, partial crossing column and so on, belongs to the out-of-code high-rise building. During the process of structural design, the elastic analysis of frequently-occurred earthquake and the dynamic elasto-plastic analysis of rarely-occurred earthquake were carried out. A series of effective measures were taken to strengthen the weak parts of the structure. The performance-based design method was adopted for structural seismic design which can achieve the expected D-class seismic performance target. At the same time, a comparative analysis on the selection of frame columns was also carried out, a simulation analysis on the vertical deformation of the external frame columns, the core tube, and finite element analysis was carried out on the outriggers joint of the strengthened story. The results show that the structure is safe and reliable to meet preset performance objectives.
Keywords: out-of-code high-rise building; steel tube-reinforced concrete column; strengthened story; outriggers joint analysis; difference of vertical deformation; seismic performance design
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