建筑结构

2009, v.39;No.310(10) 47-52

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贵阳体育场体外预应力大悬挑钢管桁架结构设计研究
Research and analysis on large span external prestressed cantilever pipe truss of Guiyang Sports Center

葛家琪;张国军;王树;黄季阳;赵雅;
Ge Jiaqi~1,Zhang Guojun~1,Wang Shu~1,Huang Jiyang~(1,2),Zhao Ya~2(1 China Aviation Planning and Construction Development Co.,Ltd.,Beijing 100120,China;2 Beijing Jiaotong University,Beijing 100044,China)

摘要(Abstract):

贵阳体育中心主体育场49m大悬挑屋盖,采用了上弦加体外预应力的斜交钢管桁架结构体系。首先进行了基于变形性能的结构体系选型分析,针对大悬挑结构,研究了结构厚跨比、预起拱、预应力分别对结构体系稳定、双重延性性能的影响。研究结果表明,增加悬挑结构厚度、施加预应力均对结构体系稳定、双重延性性能有较大提高,预起拱对结构体系稳定延性性能影响不大。对预应力钢结构体系首次提出等效平衡荷载概念并计算分析,用直观简单的等效平衡荷载概念解释了预应力体系的有效性;对预应力索-钢转换节点进行了带接触单元的有限元分析,确定了预应力损失及节点安全性;对延性性能较差的预应力索单元的延性安全性能进行分析确认。
The cantilevered roof of the stadium with 49m long at Guiyang Sports Centre employs a structural steel system of the diagonal in-plane truss with the external prestressing along the top chord.The prior selection of structural system is conducted based on the performance of deformation.The impacts of the height-span ratio and the prestressing ratio on the structural overall stability performance are investigated,the results show that the effects are notable and nonlinear.The preliminary arch camber has slight impact on the overall stability.To identify the validity of the prestressed structural system,the equivalent balanced load is firstly presented on the prestressed structural system,the validity is interpreted by using the concept of that.The contact analysis is conducted for the transfer connection between the prestressed cable and the steel member to recognize the prestressing loss and the connection security,and to analyze and identify the ductility security of the prestressed cable with poor ductility performance.

关键词(KeyWords): 预应力;大悬挑结构;索-钢转换节点;等效平衡荷载;索单元延性设计
prestressed;large span cantilevered structure;cable-member transfer connection;equivalent prestressed balanced load;ductility design of cable

Abstract:

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作者(Author): 葛家琪;张国军;王树;黄季阳;赵雅;
Ge Jiaqi~1,Zhang Guojun~1,Wang Shu~1,Huang Jiyang~(1,2),Zhao Ya~2(1 China Aviation Planning and Construction Development Co.,Ltd.,Beijing 100120,China;2 Beijing Jiaotong University,Beijing 100044,China)

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DOI: 10.19701/j.jzjg.2009.10.012

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