基于应变的管道设计准则

我国目前使用的基于许用应力的设计准则并不能完全有效地解决管道设计的所有问题，特别是对于地面变形等位移载荷控制下的情形。通过对处于极限状态的椭圆化、拉裂和局部弯曲等管道失效形式的现行基于应变的标准进行对比，为我国管道设计工作者提供了解决地震、断层等区域管道设计问题的重要参考；根据国际上对管道在特定载荷作用下基于应变的设计趋势和我国西气东输及其二线工程的大规模建设，提出了我国进行相关研究的必要性与迫切性。

PIPELINE DESIGN CODE BASED ON MORPHOTROPY STRAIN

The design code based on the permissible stress can not completely address the problems in pipeline design efficiently, especially for the displacement controlled loads such as ground displacement load. Compared with the codes based on the morphotropy strain for pipeline failure mode, like ovalization, tensile failure and local buckling, etc., this paper offers significant references for the measures of local pipeline design problems, like earthquakes and faults. It brings forward the necessity and urgency of relevant researches in accordance with the international design trend based on morphotropy strain under specific load and the large scale construction of the West to East Natural Gas Transmission Pipeline Project and its secondary line project.