A recent review of available predictive critical buckling strain equations for segments of line pipe has shown that the equations give poor test-to-predicted ratios when validated using the more than 50 full-scale experimental pipeline test results available in the University of Alberta (U of A) database (Dorey, A. B., Murray, D. W., and Cheng, J. J. R., 2000, “An Experimental Comparison of Critical Buckling Strain Criteria,” Proceeding of the International Pipeline Conference, Calgary, Alberta, Oct. 1–5, ASME, New York, pp. 71–77, Paper No. IPC00-0157.). The pipeline specimens in the experimental database were subjected to a combination of axial load, internal pressure, and monotonically increasing curvature with magnitudes representative of those that might be experienced under field operating conditions. Research has been undertaken at the U of A to develop more reliable equations and a database of over 200 experimental and numerical results now exists. The numerical results were generated using a nonlinear finite element analysis (FEA) model that was validated using the experimental database. The FEA model provided a mean test-to-predicted ratio for the peak moment capacity of 1.025 with a coefficient of variation of 0.040 and a mean test-to-predicted ratio for the local critical buckling strain of 0.997 with a coefficient of variation of 0.067 (Dorey, A. B., Murray, D. W., and Cheng, J. J. R., 2005b, “A Comparison of Experimental and FEA Results for Segments of Line Pipe Under Combined Loads,” ASME J. Offshore Mech. Arct. Eng., in press.) for the 162 load cases analyzed. This paper presents the new predictive critical buckling strain equations developed from the U of A database.

1.
Dorey
,
A. B.
,
Murray
,
D. W.
,
Cheng
,
J. J. R.
,
Grondin
,
G. Y.
, and
Zhou
,
Z.
, 1999, “
Testing and Experimental Results for NPS30 Line Pipe Under Combined Loads
,”
Proceeding of the 18th International Conference on OMAE
, St. John’s Newfoundland,
ASME
,
New York
, Paper No OMAE99/PIPE-5022.
2.
Dorey
,
A. B.
,
Murray
,
D. W.
, and
Cheng
,
J. J. R.
, 2000, “
An Experimental Comparison of Critical Buckling Strain Criteria
,”
Proceedings of the International Pipeline Conference
, Calgary, Alberta, Oct. 1–5, pp.
71
77
,
ASME
,
New York
, Paper IPC00-0157.
3.
Dorey
,
A. B.
,
Murray
,
D. W.
, and
Cheng
,
J. J. R.
, 2005b, “
A Comparison of Experimental and FEA Results for Segments of Line Pipe Under Combined Loads
,”
J. Optim. Theory Appl.
0022-3239, in press.
4.
Dorey
,
A. B.
,
Murray
,
D. W.
, and
Cheng
,
J. J. R.
, 2005a, “
Initial Imperfection Models for Segments of Line Pipe
,”
J. Optim. Theory Appl.
0022-3239, in press.
5.
Yoosef-Ghodsi
,
N.
,
Kulak
,
G. L.
, and
Murray
,
D. W.
, 1995, “
Some Test Results for Wrinkling of Girth-Welded Line Pipe
,”
Proceedings of the 14th International Conference on Offshore Mechanics and Arctic Engineering (OMAE 95)
, vol. V-pipeline Technology, Copenhagen, Denmark,
ASME
, pp.
379
388
.
6.
Taylor
,
E. S.
, 1974,
Dimensional Analysis for Engineers
,
Oxford University Press
,
London, United Kingdom
.
7.
DiBattista
,
J. D.
,
Cheng
,
J. J. R.
, and
Murray
,
D. W.
, 2000, “
Behaviour of Sleeper Supported Line Pipe
,” Structural Engineering Report No. 230, Department of Civil Engineering,
University of Alberta
, Edmonton, Alberta.
8.
Souza
,
L. T.
, and
Murray
,
D. W.
, 1994, “
Prediction of Wrinkling Behaviour of Girth-Welded Line Pipe
,” Structural Engineering Report No. #197, Department of Civil Engineering,
University of Alberta
, Edmonton, Alberta.
9.
Langhaar
,
H. L.
, 1951,
Dimensional Analysis and Theory of Models
,
Wiley
,
New York
.
10.
Canadian Standards Association
, 1996, “
Z662-96 Oil and Gas Pipeline Systems
,” Canadian Standards Association, Etobicoke, Ontario.
11.
Dorey
,
A. B.
,
Murray
,
D. W.
, and
Cheng
,
J. J. R.
, 2002, “
Material Property Effects on Critical Buckling Strains in Energy Pipelines
,”
Proceedings of the International Pipeline Conference
, Calgary, Alberta, Sept. 29–Oct. 3,
ASME
,
New York
, Paper IPC02-27225.
12.
Del Col
,
P. R.
,
Grondin
,
G. Y.
,
Cheng
,
J. J. R.
, and
Murray
,
D. W.
, 1998. “
Behaviour of Large Diameter Line Pipe Under Combined Loads
,” Structural Engineering Report No. 224, Department of Civil Engineering,
University of Alberta
, Edmonton, Alberta.
13.
Mohareb
,
M. E.
,
Elwi
,
A. E.
,
Kulak
,
G. L.
, and
Murray
,
D. W.
, 1994, “
Deformational Behaviour of Line Pipe
,” Structural Engineering Report No. #202, Department of Civil Engineering,
University of Alberta
, Edmonton, Alberta.
14.
Yoosef-Ghodsi
,
N.
,
Kulak
,
G. L.
, and
Murray
,
D. W.
, 1994, “
Behaviour of Girth-Welded Line Pipe
,” Structural Engineering Report No. #203, Department of Civil Engineering,
University of Alberta
, Edmonton, Alberta.
15.
Stephens
,
D. R.
,
Olson
,
R. J.
, and
Rosenfeld
,
M. J.
, 1991, “
Topical Report on Pipeline Monitoring—Limit State Criteria
,” NG-18 Report No. 188, Battelle, Columbus, Ohio.
16.
Mohareb
,
M. E.
,
Kulak
,
G. L.
,
Elwi
,
A. E.
, and
Murray
,
D. W.
, 2001, “
Testing and Analysis of Steel Pipe Segments
,”
J. Transp. Eng.
0733-947X,
127
(
5
), pp.
408
417
.
17.
Brush
,
D. O.
, and
Almroth
,
B. O.
, 1975,
Buckling of Bars, Plates and Shells
McGraw-Hill
,
New York
.
18.
Devore
,
J. L.
, 1991, “
Probability and Statistics for Engineering and the Sciences
,”
3rd ed.
,
Brooks/Cole Publishing Company
,
Pacific Grove, CA
.
19.
SPSS, Inc.
, 1999,
SigmaPlot 5.0
(software package), SPSS Inc., Chicago Illinois.
20.
Dorey
,
A. B.
,
Cheng
,
J. J. R.
, and
Murray
,
D. W.
, 2001, “
Critical Buckling Strains in Energy Pipelines
,” Structural Engineering Report No. 237, Department of Civil Engineering,
University of Alberta
, Edmonton, Alberta.
21.
Bushnell
,
D.
, 1981, “
Buckling of Shells—Pitfall for Designers
,”
AIAA J.
0001-1452,
19
(
9
), pp.
1183
1226
.
22.
Sorenson
,
J.
et al.
, 1970, “
Buckling Strength of Offshore Pipelines
,” Battelle Report to Offshore Pipeline Group, Columbus, OH.
23.
Bouwkamp
,
J.
, and
Stephen
,
R.
, 1974, “
Full Scale Studies on Structural Behaviour of Large Diameter Pipes Under Combined Loading
,” Report No. UC-SESM 74-1,
University of California Berkeley
.
24.
Korol
,
R. M.
, 1979, “
Critical Buckling Strains of Round Tubes in Flexure
,”
Int. J. Mech. Sci.
0020-7403,
21
, pp.
719
730
.
25.
Sherman
,
D.
, 1983, “
Bending Capacity of Fabricated Pipes
,” University of Wisconsin-Milwaukee Report.
26.
Sherman
,
D.
, 1984, “
Bending Capacity of Fabricated Pipes-Supplement
,” University of Wisconsin-Milwaukee Report-Supplement.
27.
Wilhoit
,
J.
,
Merwin
,
J.
, and
Jursa
,
J.
, 1972, “
Critical Plastic Buckling Parameters for Pipe in Pure Bending
,” ASME Paper 72-Pet-29.
You do not currently have access to this content.