箱型钢筋混凝土倒虹吸管非线性有限元分析

Non-Linear FEA for the Box-Like Structure of Reinforced Concrete Inverted Siphon

结合南水北调中线工程李河箱型倒虹吸结构的设计,利用ANSYS中的solid65混凝土单元,采用整体式配筋模型对管身进行了3种不同工况下的非线性有限元分析.通过设置混凝土的应力应变关系曲线及钢筋的双线性随动强化模型模拟结构材料的非线性属性,结果表明:当回填完成且倒虹吸管内无水时会对结构不利.

Large box-like structure of the inverted-siphon is widely used on the Project of Middle Route of Southto-North Water Diversion. In this paper,combine with the design,inverted-siphon was analyzed by the solid65 element in ANSYS. There are three kinds of load combinations to affect on the structure. Their contributions and status have been considered. BKIN of steel bar and proper constitutive equation and failure criteria of concrete are adopted. The result indicates that the precision of models is high.