Parametric study for buckling of liners: effect of liner geometry and imperfections

Khaled El-Sawy, Ian D. Moore

Research output: Contribution to conferencePaperpeer-review

32 Citations (Scopus)

Abstract

Non-linear Finite Element analysis is used to investigate liner stability under external fluid pressure. Liners are assumed to be circular or elliptical with initial local or global geometrical imperfections. The typical local imperfections examined are defined as a wavy intrusion into the liner. Global imperfections are also investigated in the form of an ovality in the liner or a gap between the liner and the host pipe. A parametric study is undertaken to determine the effect of the initial liner geometry. It is shown that critical external fluid pressure depends heavily on the ratio of liner thickness to radius. Local geometrical imperfections and the size of the gap between the liner and the host pipe have very substantial effects on the liner buckling strength particularly for thin liners. The results of the parametric study are used to develop a new design method for liners used in rigid pipe rehabilitation.

Original languageEnglish
Pages416-423
Number of pages8
DOIs
Publication statusPublished - 1997
EventProceedings of the 1997 ASCE Conference on Trenchless Pipeline Projects - Boston, MA, USA
Duration: Jun 8 1997Jun 11 1997

Other

OtherProceedings of the 1997 ASCE Conference on Trenchless Pipeline Projects
CityBoston, MA, USA
Period6/8/976/11/97

ASJC Scopus subject areas

  • Engineering(all)

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