00471772

Component

http://onlinepubs.trb.org...trr/1986/1087/1087-007.pdf

https://scholar.google.co...igue&publication_year=1986

This paper contains the results of a finite element analysis of the soil-structure interaction of a buried flexible pipe subjected to internal pressure. The analysis is performed using a fine mesh so that (a) an accurate representation is made of the highly variable soil stiffness in some installations, similar to that of a pipe with poorly supported haunches resting on a hard bedding, and (b) an accurate model is made of the pipe wall stresses in light of the rapid attenuation of local deformations and strains in flexible pipe buried in stiff soils. In addition, the nonlinear behavior of pressurized flexible pipe, including large deflections and the flexural stiffening effect of the pressure-induced membrane stresses, is modeled. A special purpose program, FLEXPIPE, is developed. The program uses Duncan's soil model and considers the step-by-step nature of construction. It is used to calculate the stresses and strains in a buried flexible pipe with improper haunch support and hard bedding. It is shown that significant flexural stresses are developed at the invert of the pipe after installation and that internal pressure magnifies the flexural stresses and strains thus developed.

Publication of this paper sponsored by Committee on Subsurface Soil-Structure Interaction. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01418817

pp 46-53

1986

Transportation Research Record

0309041074

Print

Figures (8) ; References (15) ; Tables (3)

Bedding; Deflection; Deformation; Deformation curve; Finite element method; Flexibility; Mathematical models; Pipe; Pressure; Soil structure interaction; Stiffness; Tubing; Underground structures

Bridges and other structures; Geotechnology; Highways; I42: Soil Mechanics

TRIS, TRB

Mar 31 1988 12:00AM

• ABRASION RESISTANCE OF ALUMINUM CULVERT BASED ON LONG-TERM FIELD PERFORMANCE
• COMPARATIVE EVALUATION OF PRECAST CONCRETE PIPE-ARCH AND ARCH STRUCTURES
• CORRUGATED STEEL PLATE STRUCTURES WITH CONTINUOUS LONGITUDINAL STIFFENERS: LIVE LOAD RESEARCH AND RECOMMENDED DESIGN FEATURES FOR SHORT-SPAN BRIDGES
• ENHANCEMENT OF MEMBRANE ACTION FOR ANALYSIS AND DESIGN OF BOX CULVERTS
• EVALUATION OF METAL DRAINAGE PIPE DURABILITY AFTER TEN YEARS
• EXPERIMENTAL STUDY OF BURIED FIBER-REINFORCED PLASTIC PIPE
• FIELD PERFORMANCE OF CORRUGATED POLYETHYLENE PIPE CULVERTS IN OHIO
• INELASTIC FLEXURAL STABILITY OF CORRUGATIONS
• MEASUREMENTS AND ANALYSES OF COMPACTION EFFECTS ON A LONG-SPAN CULVERT
• PRACTICAL GEOTECHNICAL AND ENGINEERING PROPERTIES FOR TUNNEL-BORING MACHINE PERFORMANCE ANALYSIS AND PREDICTION