摘要
为实现大开口刚性内拉环索穹顶结构的顺利成形,以成都凤凰山专业足球场为研究对象,提出了一种牵引下层索网提升和张拉双层索网的施工方法,对内拉环与索杆系提升顺序、牵引工装索长度优化和脊索锚接时机等关键技术问题进行了研究。采用ANSYS建立结构有限元模型,对施工全过程进行模拟并分析施工成形过程中的结构响应。结果表明:牵引下层索网提升和张拉双层索网的施工方法可使结构顺利成形并减少50%的牵引设备投入;内拉环先于索杆系提升可有效减轻内拉环的扭转;斜索张拉阶段结构内力和位移变化较大,应谨慎控制张拉进度;结构成形后与设计状态基本一致,验证了成形方法的有效性。
In order to realize the smooth formation of the cable dome with a large-opening rigid inner tension ring,the construction method that the lifting and tensioning of the double-layer cable net by the traction of the lower cable net was proposed for Chengdu Phoenix Mountain Professional Football Stadium project.The key technical issues such as the lifting sequence of inner tension ring and cable-strut system,the optimization of traction cables length and the timing of anchoring the ridge cables were studied.The finite element model of the structure was established in ANSYS to simulate and analyze the structural response during construction.The results show that the construction method proposed in the paper can form the structure successfully and reduce the investment of traction equipment by 50%.The lifting of the inner tension ring precedes the traction of the cable-strut system,which can reduce the torsion of the inner tension ring effectively.The internal force and displacement of the structure change greatly at the stage of diagonal cable tensioning,which should be carefully controlled.The formed structure is basically consistent with the design state,verifying the effectiveness of the construction method.
作者
张宁远
罗斌
赵旻旻
阮杨捷
仇荣根
ZHANG Ningyuan;LUO Bin;ZHAO Minmin;RUAN Yangjie;QIU Ronggen(Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 211189,China;National Prestressed Engineering Research Center,Southeast University,Nanjing 211189,China;Nanjing Dong-Da Modern Prestressed Engineering Co.,Ltd,Nanjing 210018,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2023年第4期150-157,215,共9页
Journal of Building Structures
关键词
索穹顶
大开口刚性内拉环
有限元分析
施工全过程分析
结构成形
cable dome
large-opening rigid inner tension ring
finite element analysis
whole construction process analysis
structural forming