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?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。
Abstract
Large flow and long span of the large-scale aqueduct in South-to-North Water Diversion Project pose higher requirements for the aqueduct design. Taking the Jihe 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 distribution 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.
关键词
南水北调 /
大型渡槽 /
预应力配筋 /
有限元法 /
热－应力耦合
Key words
south-to-north water diversion project /
large aqueduct /
pre-stress reinforcement /
FEM method /
thermal stress coupling
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参考文献
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