埋地管道对称水平弯头的弹性地基曲梁解

SOLUTION TO CIRCULAR ARCHES ON THE ELASTIC FOUNDATION OF THE SYMMETRICAL HORIZONTAL BURIED PIPELINE ELBOW

本文在分析埋地管道水平弯头计算中的“弹性抗弯铰”模型的基础上,提出了一种更符合管道受力与变形特征的计算模型。给出了该问题按纵横弯曲弹性地基曲梁求解的一般解答。文末用算例说明了水平弯头的曲率半径和弯头夹角对管道内力、位移的影响。

On the basis of analyzing 'elastic anti-bending reflection-models ' for calculating the horizontal bends of buried pipelines, the article puts forward a kind of calculating model that conforms more with the forced and deformed characters of the pipelines, and gives the general solution to the problem by determining the circular arches with combined axial and lateral loads on the elastic foundation. Examples are given at the end of the paper to show the influence of the horizontal elbow radius and angle on the pipeline internal forces and displacements.