南水北调中线工程泲河渡槽三维有限元分析

Three-Dimensional FEM Analysis on Jihe River Aqueduct in the Middle Route of South-to-North Water Diversion Project

南水北调大型渡槽流量大、跨度大等特点,对渡槽的设计提出了更高的要求。结合南水北调泲河渡槽的工程实例,运用三维有限单元法对该渡槽的受力性能进行模拟,同时重点考虑预应力和温度荷载的影响,研究了渡槽槽身各部位控制断面的应力、变形分布规律。计算结果表明:槽身截面设计和预应力筋布置方案合理,应力和位移均在允许范围内,满足抗裂和挠度要求。

Large flow and long span of the large-scale aqueduct in South-to-North Water Diversion Project pose high-er requirements for the aqueduct design. Taking the Jibe River Aqueduct for example, the structural behavior of the aqueduct was simulated by using 3-D FEM method. In consideration of pre-stress and temperature load, the distri-bution of stress and deformation in different control sections of the aqueduct body was analyzed. Result indicates that the design of the aqueduct body section and the scheme of pre-stressed reinforcement are reasonable. Stress and displacement are within the allowable range and both meet the requirements of anti-crack and deflection.