Tunnelling and Underground Space Technology
Tunnelling and Underground Space Technology
5 years ago

An updated structure for a stainless steel liner and the estimation of its buckling strength

Stainless steel liner has been used for the trenchless rehabilitation of damaged pipelines in China, but its limited buckling strength severely constrains its wider application due to the lack of ring stiffness. The increase of liner thickness to some extent results in a greater buckling strength, but still unavoidably causes a higher cost. With the intention of improving the stability of the thin-wall structure as well as saving project cost at the same time, an updated structure, consisting of numbers of arch liners, was introduced in this paper. Like the conventional circular liner, arch liners are in-situ manually welded to the host pipe to form a cylinder. To predict the buckling strength of rigidly encased arch liners, a theoretical model, modified from Glock’s buckling model, was also proposed, based on which the enhancement factor K was defined. With this theoretical model, a series of calculations was done to demonstrate the arch liner’s improved stability. Meanwhile, finite-element method (FEM) was used to estimate the buckling strength of arch liners, and the Arc-Length Control Method was applied in the simulation to trace the pre-and post-buckling behavior. Comparison between the theoretical model and FEM results was performed and the excellent agreement showed the model’s correctness.

Publisher URL: www.sciencedirect.com/science

DOI: S0886779817303802

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.