三亚财经国际论坛中心塔楼超高层结构设计分析  

Design and analysis of super high-rise tower structure of Sanya Finance International Forum Center

作　　者：张龙生[1] 王松帆[1] ZHANG Longsheng;WANG Songfan(Guangzhou Design Institute,Guangzhou 510620,China)

机构地区：[1]广州市设计院,广州510620

出　　处：《建筑结构》2021年第11期21-27,53,共8页Building Structure

摘　　要：三亚财经国际论坛中心塔楼采用混凝土框架-核心筒结构体系,采用两道加强层有效地提高整体结构刚度。介绍了结构单元的划分、风洞试验及风荷载的确定、地基基础处理措施;对高度为194.3m的塔楼,分别进行小震下常规静力、动力分析、中震下构件截面承载力验算以及大震下动力弹塑性时程分析,达到所设定的C级结构抗震性能目标;详细分析了抗风斜柱节点关键技术、罕遇地震作用下加强层对结构的影响及相应墙肢加强措施。结果表明:低烈度强台风地区超高层结构应综合考虑竖向及平面结构的合理化布局及全面地对重力荷载、地震作用、风荷载的合理评估,设置两道加强层,其刚度满足位移要求即可,通过细致的计算对比分析和对关键构件的加强措施,可使得外框架、核心筒满足中震轻微损坏(弹性)及大震轻度损坏的抗震性能目标。Sanya Finance International Forum Center adopts a concrete frame-corewall structural system, and uses two strengthened stories to effectively improve the overall structural rigidity. The division of structural units, wind tunnel test and determination of wind load, and foundation treatment measures were introduced. For the tower with a height of 194.3 m, the conventional static and dynamic analysis under frequent earthquakes, the check calculation of the member’s section bearing capacity under fortification earthquakes, and the dynamic elastoplastic time-history analysis under rare earthquakes were carried out to achieve the set seismic performance objectives of class C structure. The key technology of the wind-resistant inclined column node, the influence of the strengthened stories on the structure under the action of rare earthquakes and the corresponding wall reinforcement measures were analyzed in detail. The results show that the super high-rise structure in the low-intensity and strong typhoon area should comprehensively consider the rational layout of vertical and plane structures and reasonable evaluation of gravity load, earthquake action and wind load should be provided comprehensively. Two strengthened floors should be set up, and their stiffness should meet the displacement requirements. Through careful calculation and comparison analysis, and strengthening measures for key components, the outer frame and corewall can meet the seismic performance targets of minor damage(elasticity) under fortification earthquakes and minor damage under rare earthquakes.

关 键 词：超高层结构 混凝土框架-核心筒 加强层 抗震性能目标 结构构件损伤 斜柱 

分 类 号：TU318[建筑科学—结构工程]