正反悬链线形倒虹吸管身断面研究

针对倒虹吸管身结构形式单一、受力状况较差的问题，采用工程类推和有限元建模分析方法，基 于分析实腹式悬链线拱桥拱轴线确定方法、倒虹吸工作机理和悬链线线形特性，建立了倒虹吸管身断面 正反悬链线线形方程，构建了箱型、圆形和正反悬链线形倒虹吸管身断面形式的有限元模型，并进行了 论证。

Research on Pros and Cons Catenary Inverted Siphon Section

With a purpose to solve the problems such as single structure and poor stress distribution of inverted siphon, the methodology of analogy and finite element modeling is used to establish the equations of pros and cons catenary inverted siphon section by analyzing solid-web catenary arch axis in arch bridge, work principle of inverted siphon and characteristics of catenary lines. And then, it establishes the finite element models of the inverted siphon section with pros and cons catenary shape, box and circular shape. Finally, the superiority of pros and cons catenary inverted siphon section is proved.