Local Web Buckling Strength of Coped Steel I Beams
Publication: Journal of Structural Engineering
Volume 129, Issue 1
Abstract
When a beam flange is coped to allow clearance at the connection, the strength of the coped region will be reduced. Local web buckling at the coped region may occur when the cope length is long and/or the compression flange is braced. Experimental and analytical investigation of the strength of coped steel I beams were conducted by a number of researchers and design formula was also proposed. However, the proposed formula underestimates the local web buckling capacity of a coped I beam, especially when the cope-depth to beam-depth ratio is small. To improve this discrepancy, full-scale tests of the web buckling strength of coped steel I beams and a series of analytical studies were carried out. A modified plate buckling formula, which considers the shear buckling phenomenon at the coped region, is proposed. The modified formula gives a better prediction of the local web buckling strength of a coped I beam. The test-to-predicted ratios varies from 0.92 to 1.06.
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References
ABAQUS user’s manual, version 5.8. (1997). Hibbit, Karlsson, and Sorenson, Pawtucket, R.I.
American Society for Testing and Materials (ASTM). (1997). “A370 Standard test methods and definitions for mechanical testing of steel products.” Philadelphia.
Birkemoe, P. E., and Gilmor, M. I.(1978). “Behavior of bearing critical double angle beam connections.” Eng. J., 15(4), 109–115.
British Constructional Steelwork Association (BCSA). (1993). Joints in simple construction, vol. 1: Design methods, 2nd Ed., British Constructional Steelwork Association Limited, Westminster, London.
Cheng, J. J. R.(1993). “Design of steel beams with end copes.” J. Constr. Steel Res., 25, 3–22.
Cheng, J. J. R., and Snell, W. J. (1991). “Experimental study of lateral buckling of coped beams.” Proc., Structural Stability Research Council, Annual Technical Session, Chicago, 181–192.
Cheng, J. J. R., and Yura, J. A.(1986). “Local web buckling of coped beams.” J. Struct. Div., ASCE, 112(10), 2314–2331.
Cheng, J. J. R., Yura, J. A., and Johnson, C. P. (1984). “Design and behaviour of coped beams.” Phil M. Ferguson Structural Engineering Laboratory Rep. No. 84-1, Univ. of Texas at Austin, Austine, Tex.
Lam, C. C., Yam, M. C. H., and Iu, V. P. (1998). “Analytical study of the elastic lateral torsional buckling of coped I-beam.” FST Rep. No. CE-1998-02(ST), Faculty of Science and Technology, Univ. of Macau, Macall.
Lam, C. C., Yam, M. C. H., Iu, V. P., and Cheng, J. J. R.(2000). “Design for lateral torsional buckling of coped I-beams.” J. Constr. Steel Res., 54(3), 423–443.
Ricles, J. M., and Yura, J. A. (1980). “The behavior and analysis of double-row bolted shear web connections.” Phil. M. Ferguson Structural Engineering Laboratory Thesis No. 80-1, Univ. of Texas at Austin, Tex.
Steelwork design guide to BS5950: Part 1 and part 2: (1990), vol. 1 sec. properties member capacities. 4th ed., Ascot, Steel Construction Institute, Ascot, Berkshire.
Yam, M. C. H., and Cheng, J. J. R.(1990). “Fatigue strength of coped steel beams.” J. Struct. Eng., 116(9), 2447–2463.
Yam, M. C. H., Lam, A. C. C., Iu, V. P., and Cheng, J. J. R. (2000). “Experimental investigation of the local web buckling strength of coped steel I-beam.” Canadian Society for Civil Engineering, Conf. Proc., 105–113.
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Information
Published In
Journal of Structural Engineering
Volume 129 • Issue 1 • January 2003
Pages: 3 - 11
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Jun 26, 2001
Accepted: May 14, 2002
Published online: Dec 13, 2002
Published in print: Jan 2003
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