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。
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.
出处
《建筑结构》
CSCD
北大核心
2010年第12期49-55,共7页
Building Structure
基金
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]
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
prestress
large span prestressed cantilever truss
stepped entirely loading method
consecutive loading method
equivalent prestressed balanced load
