摘要
顺德德胜体育中心为在国内沿海台风高发区首次采用单层马鞍形索网结构的工程。索网平面为109 m×71 m的椭圆,索网矢高8 m,索网屋面钢结构的支撑体系和抗侧力体系由外围V支撑和屋面环梁共同组成。索网结构纵向受力索和横向稳定索分别采用2ϕ65和2ϕ45高强密封索,环梁为截面1 m×2 m的巨型矩形梁,屋面系统为三层膜面体系。作为沿海强台风地区的马鞍形索网屋盖,必须通过精细找形和找力确定主索和次索的预拉力,紧密协调“恒载+活载”和“恒载+风载”组合下挠度和索内力的相对比例,使得向上和向下的变形相对平衡。结构体系和找形找力初步确定后,通过静力分析、稳定性分析、防连续倒塌分析、施工模拟分析以及罕遇地震弹塑性分析,进行构件精细化设计并验证结构方案的合理性。索网安全冗余度和施工次序对结构体系的成型至关重要,设计采用非线性静力分析方法进行断索分析,并从工程设计角度建议采用高空溜索+张拉稳定索的张拉方案。针对结构受力特点,周边V撑承受较大双向轴力,且外露可视,故创新性采用双向推力轴承节点,在保证结构受力同时确保建筑美观性,同时确保节点安全和冗余度。屋盖钢结构和索结构设计均能满足GB 50017—2017《钢结构设计标准》的要求,并能有效实现建筑形态。
Shunde Desheng Sports Center is the first time to adopt the single-layer saddle shaped cable net structure in the coastal typhoon high incidence area in China.The plane of cable net is 109 m×71 m ellipse,and the rise height of cable net is 8 m.The support system and lateral force resistance system of cable net roof steel structure are composed of peripheral V support and roof ring beam.Two highstrength sealing cables with a diameter of 65 mm and 45 mm are respectively used for the longitudinal stress cable and the lateral stability cable of the cable network structure.The ring beam is a giant rectangular beam 1 m×2 m.The roof system is a three-layer membrane system.As the saddle shaped cable net roof used for the first time in the coastal strong typhoon area,the pretension of the main cable and the secondary cable must be determined through fine shape finding and force finding,and the relative proportion of the deflection and the cable internal force under the combination of“constant load+live load”and“constant load+wind load”must be closely coordinated,so that the upward and downward deformation are balanced.After the structural system and form finding and force finding are preliminary determined,the detailed design of the components is carried out and the rationality of the structural scheme is verified through static analysis,stability analysis,continuous collapse prevention analysis,construction simulation analysis and large earthquake elastic-plastic analysis.The safety redundancy and construction sequence of the cable network are very important to the formation of the structural system.The nonlinear static analysis method is adopted for the cable breaking analysis in the design,and it is suggested to adopt the tensioning scheme of high-altitude sliding cable+tensioning stable cable from the perspective of engineering design.According to the stress characteristics of the structure,the surrounding V supports bear large two-way axial force and are exposed and visible.Therefore,the innovative two-way thrust bearing node is adopted to ensure the structural stress and the architectural aesthetics,and ensure the safety and redundancy of the node.The design of roof steel structure and cable structure can meet the requirements of Steel Structure Design Standard(GB 50017—2017),and can effectively realize the architectural form.
作者
陈进于
区彤
刘雪兵
姜正荣
Jinyu Chen;Tong Ou;Xuebing Liu;Zhengrong Jiang(Guangdong Architectural Design and Research Institute Co.,Ltd.,Guangzhou 510010,China;Guangdong Construction Metal Enclosure System Engineering Technology Research Center,Guangzhou 510010,China;School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510641,China)
出处
《钢结构（中英文）》
2022年第8期26-34,共9页
Steel Construction（Chinese & English）
关键词
单层马鞍形索网
稳定性分析
施工模拟分析
防连续性倒塌分析
罕遇地震弹塑性分析
双向推力轴承
single layer saddle cable net
stability analysis
construction simulation analysis
continuous collapse prevention analysis
large earthquake elastic-plastic analysis
bidirectional thrust bearing
