受沉陷作用埋地管道破坏判别方法

大地地震震害经验表明，场地的不均匀沉陷是导致埋地管线破坏地重要原因之一。提出一个适用的管道破坏判别方法十分重要本文提出了一个新的方法，用以分析受沉的埋地管道的反应，该方法发迹了沉陷区和非沉陷区都用弹性地基梁的分析途径，在沉陷区考虑了管道几何大变形，克服了现有方法公适用于无限远处发生最大沉陷的缺陷，适用于任何沉陷参数的情况。

DAMAGE CRITERIA OF BURIED PIPELINES THRIDUGH CROUND SETTLEMENT ZONE

This paper offers a new method which deals with the response analysis of buried pipelines subjected to ground settlement. The method takes the geometrical large deformation of the pipelines into account, while the existing method is only suited to solve maximum settlement happening to the infinite far zone. This method can calculate displacement and sectictn internal force of the pipeline through settlement zone. This paper has also suggested a new judgement eriterion of pipeline damage, considering the pipeline's plastic limit state. And the criterion has been tested by some examples. Some useful conclusions are drawn,