摘要
南水北调中线总干渠渡槽设计过水流量大,通过经济技术指标比选,确定采用开口箱梁矩形槽型式,采取三向预应力设计。由于渡槽受力呈现较强的空间性,为了提高设计效率并便于复核,截面拟定和配置预应力时采用平面杆系对渡槽横向和纵向分别进行计算,然后用三维有限元法进行复核。复核阶段主要考虑了非线性温度荷载和侧向风荷载的影响。计算结果表明,各工况下,渡槽大部分部位为受压状态,局部拉应力亦控制在规范允许范围内。
The designed flow of aqueduct of the main canal of South - to - North Water Diversion Middle Route Project was large. Through comparison of economic and technical indexes, the open box girder rectangular canal is adopted for a large - scale aqueduct, which is designed by 3 - direction pre - stress. As the spatiality of the aqueduct force action, the cross - section selection and pre - stress were determined by plan bar system for the transversal and longitudinal calculation and the calculation results were checked by three - dimensional FEM. The non - linear thermal load and lateral wind load were mainly considered during check period. The results show that main parts of the aqueduct are in compressed state, and the local tensile stress is also in the scope of design code.
出处
《人民长江》
北大核心
2011年第20期31-34,共4页
Yangtze River
关键词
矩形渡槽
非线性温度荷载
设计
南水北调中线工程
rectangular aqueduct
non - linear thermal load
design
South - to - North Water Diversion Middle Route Project
