复杂高耸观光塔钢结构分析与设计  

Analysis and Design of Complex Steel Structure of High-Rising Sightseeing Tower

作　　者：刘美景[1] 曾少儒 范圣刚[2] Meijing Liu;Shaoru Zeng;Shenggang Fan(Department of Civil Engineering,Southeast University Chengxian College,Nanjing 210088,China;School of Civil Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学成贤学院土木工程系,南京210088 [2]东南大学土木工程学院,南京210096

出　　处：《钢结构（中英文）》2021年第2期56-63,共8页Steel Construction（Chinese & English）

基　　金：国家自然科学基金资助项目(51878146);江苏省“青蓝工程”中青年学术带头人资助项目(2016);江苏省“六大人才高峰”高层次人才选拔培养资助项目(JZ-001)。

摘　　要：观光塔凭借其结构高度高、造型细长等特点,极大提升了游客观感体验,同时也给结构设计带来了巨大挑战。结合某复杂高耸观光塔工程,介绍了观光塔钢结构设计的特点与难点。观光塔总高度为204.4 m,主要包含裙房、主塔塔身、塔楼及塔顶游乐设备四部分,其功能涵盖商场、物业、旋转餐厅、观光平台和游乐设施等,钢塔主体结构采用钢结构筒体结构,筒身由钢管混凝土柱及钢支撑构成,其平面为八边形,共布置8个钢管混凝土柱,竖向沿八边形外围布置跨层X形支撑作为主要抗侧力体系。在介绍整体结构体系及功能分布的基础上,结合结构各部位特点与难点对结构设计方案展开阐述。观光塔主塔结构高宽比大,塔楼处直径较大且所处位置较高,放大了高宽比大这一不利影响。针对该特点,在塔身底部设置四个伸臂支撑桁架,并通过对比分析确定伸臂支撑桁架与钢柱连接点的标高位置,有效减轻了观光塔主塔结构高宽比大的不利影响;对于楼面大开洞导致的刚度削弱,在楼面内布置水平钢支撑,结合楼面钢梁共同形成抵抗水平侧力的一道通长桁架;将塔楼底层设置为转换桁架层,以实现塔楼大悬挑,悬挑桁架杆件均采用H型钢;为有效锚固观光塔顶部太空梭游乐设备,在太空梭支座底部设置转换桁架,将荷载直接传递到塔体外筒钢管混凝土柱上;布置专门的钢梁用于支承旋转餐厅设备,分别采用变桁架高度与变截面高度梁的方式解决了旋转设备高度导致的结构高差问题。利用有限元软件对观光塔结构开展了模态分析、风荷载及地震作用分析、结构变形与受力分析,并对结构中的关键节点如底部伸臂支撑桁架与裙房连接节点开展了精细化有限元分析。分析结果表明:结构振型模态与周期、结构在风荷载与地震作用下的侧向变形、结构竖向变形与杆件承载力验算等各项性�The sightseeing tower,with its high structural height and slender shape,greatly improves tourists’visual experience,but it also brings great challenges to structural design.By analyzing a complex high-rise sightseeing tower project,the characteristics and difficulties are introduced in terms of steel structure design of sightseeing tower.The total height of the sightseeing tower is 204.4 m,which mainly includes four parts:podium,tower body,tower and amusement equipment at the top of the tower.Its functions include shopping malls,property service,revolving restaurants,sightseeing platforms and amusement facilities.The main structure of the steel tower adopts the form of steel structure cylinder,and the cylinder body is composed of concrete filled steel tube columns and steel bracings.The plane of the cylinder body is octagonal,and eight concrete-filled steel tubular columns and cross-story X-shaped braces are vertically arranged along the octagonal periphery as the main lateral force resistance system.On the basis of introducing the overall structural system and functional distribution,the paper expounds the structural design scheme in combination with the characteristics and difficulties of each part of the structure.The height-width ratio of the main tower structure of the sightseeing tower is large,the tower has a large diameter and a high position,which enlarges the adverse effect of large heightwidth ratio.According to this characteristic,four outrigger trusses were arranged at the bottom of the tower body,and the elevation of the connection between the outrigger trusses and the steel column was determined through comparative analysis,which effectively reduced the adverse effect of large height-width ratio of the main tower structure;For the stiffness weakening caused by large openings in the floor,horizontal steel braces were arranged in the floor,and a long truss resisting horizontal force was formed together with floor steel beams;The bottom layer of the tower was set as the transfer truss layer to reali

关 键 词：高耸结构 钢结构 观光塔 结构布置 节点设计 

分 类 号：TU973.13[建筑科学—结构工程]