Characteristics of Fiberglass Pipes

This study experimentally and numerically investigates the load deformation characteristics of fiberglass pipes. Fiberglass pipes of 400 mm and 600 mm diameters were fully instrumented and loaded. Load cell, LVDT, strain gauges and data logger were used. Two sets of strain gauges, each consisting of five gauges, were attached inside and outside the pipe circumferential line at 22.5 deg intervals. Displacement controlled loading machine of 10-ton capacity was used to impose line load at rates of 1 to 10 mm/min. Results indicate that rate of loading has no effect on the stiffness of fiberglass pipes. Nonlinear 3-D finite element analysis program (Z-Soil) was employed. Experimental results were simulated using Hoek-Brown model. It has been shown that linear elastic prediction can capture pipe load-deformation response up to 5% vertical deflection. Advanced Hoek-Brown model further accurately predicts deformation up to 10%. The calibrated numerical tool and the refined material parameters were used efficiently and realistically for further modeling and analysis of staged excavation and backfilling of buried fiberglass pipes. Beam and contact elements were utilized. Results show bending moments, contact stresses, deformations, stresses, and strains maps. Pipe deflection increases with burial depth, then arching effects predominate at large coverage. Acceptable small deformations were obtained under simulated common operational and environmental conditions.

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; Photos; References; Tables;
  • Pagination: 13p
  • Monograph Title: Pipeline Engineering and Construction: What's on the Horizon? Proceedings of the Pipelines 2004 International Conference, August 1-4, 2004, San Diego, California

Subject/Index Terms

Filing Info

  • Accession Number: 01003231
  • Record Type: Publication
  • ISBN: 0784407452
  • Files: TRIS
  • Created Date: Aug 16 2005 1:31PM