(1 中国航空规划建设发展有限公司，北京 100120；

2 贵阳金阳建设投资有限公司，贵阳 550001；3 北京交通大学，北京 100044)

［摘要］应用MIDAS和ANSYS两种软件，对采用有索张拉和无索施加等效平衡荷载两种模型的贵阳奥体中心主体育场预应力大悬挑桁架结构，运用连续分析法和分步一次加载法两种计算方法，对施工全过程中结构力学响应进行了仿真分析。通过对比分析两种不同计算模型的拉索内力、结构杆件应力和结构变形的计算结果，证实一次加载法是安全的。通过对预应力张拉过程中索力与主体结构端部位移值两项关键技术指标的仿真计算结果与工程实测结果的分析对比，证实大悬挑桁架结构在上弦施加预应力是有效的。

［关键词］预应力；大悬挑结构；分步一次加载法；连续分析法；等效平衡荷载

Simulation analysis on prestressing construction of the main stadium in Guiyang Olympic Sports Center

Ge Jiaqi1, Zhou Shunhao2, Gu Peng3, Huang Jiyang1, Zhang Guojun1, Zhang Qiming1

(1 China Aviation Planning and Construction Development Co., Ltd., Beijing 100120, China; 2 Guiyang Jinyang

 Construction Investment Co., Ltd., Guiyang 550001, China; 3 Beijing Jiaotong University, Beijing 100044, China)

Abstract:The large span prestressed cantilever truss was taken as the research subject by simulating the whole process of prestressing construction with two calculation methods and two different models. The internal force of cable and node displacement were calculated and compared, and the safety during construction process was verified. By contrasting the internal force and displacement in different models and construction, the prestressing ratio is effective in the large span prestressed cantilever truss.

Keywords:prestress; large span prestressed cantilever truss; stepped entirely loading method; consecutive loading method; equivalent prestressed balanced load

*贵州省科技厅工业攻关项目(［2010］3002),贵阳市科技局工业攻关项目［2010］。

作者简介：葛家琪，研究员，一级注册结构工程师，公司总结构师，Email:capdi.gssd@vip.163.com。

参考文献

［1］葛家琪，张国军，王树，等. 贵阳体育场体外预应力大悬挑钢管桁架结构设计研究［J］.建筑结构，2009，39(10):47-52.

［2］王树，张国军，张爱林，等. 2008奥运会羽毛球馆索撑节点预应力损失分析研究［J］.建筑结构学报，2007，28(6):39-44.

［3］张国军，葛家琪，秦杰，等. 2008奥运会羽毛球馆弦支穹顶预应力张拉模拟施工过程分析研究［J］.建筑结构学报，2007，28(6):31-38.