Design of Steel Equal Angle Lintels
Publication: Journal of Structural Engineering
Volume 135, Issue 5
Abstract
Single equal angle steel beams are often used as lintels to support eccentric loading acting normal to one flange. This loading causes combined biaxial bending and torsion, which is not allowed for in most steel design codes. Instead, approximate methods based somewhat loosely on past research studies have been used to develop design approximations and tables. This paper reviews past research on single equal angle beams used as lintels and develops an improved method of predicting their strengths which includes the effects of initial twist rotations, eccentric loads, and large twist rotations, and utilizes the plastic capacities of compact beams. The strengths predicted are significantly higher than those of previous approximations. More accurate strength approximations are proposed, and suggestions are made for serviceability design.
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References
American Institute of Steel Construction (AISC). (2005a). Commentary on the specification for structural steel buildings, Chicago.
American Institute of Steel Construction (AISC). (2005b). Specification for structural steel buildings, Chicago.
Australian Institute of Steel Construction. (1987). Safe load tables for structural steel, Sydney, Australia.
Australian Institute of Steel Construction. (1999). Design capacity tables for structural steel, Vol. 1: Open sections, 3rd Ed., Sydney, Australia.
Bridge, R. Q., and Trahair, N. S. (1981). “Bending, shear, and torsion of thin-walled beams.” Steel Constr., 15(1), 2–18.
British Standards Institution (BSI). (2000). “Structural use of steelwork in building. Part 1:2000: Code of practice for design in simple and continuous construction: hot rolled sections.” BS5950, London.
British Standards Institution (BSI). (2005). “Eurocode 3: Design of steel structures. Part 1.1: General rules and rules for buildings.” BS EN 1993-1-1, BSI, London.
Goh, C. C., Dayawansa, P. H., and Bennetts, I. D. (1991). “Design of angles to AS4100-1990.” Steel Constr., 25(2), 2–14.
Leigh, J. M., and Lay, M. G. (1969). “The design of laterally unsupported angles.” Rep. No. MRL 22/1, BHP Melbourne Research Laboratories, Clayton, Australia.
Leigh, J. M., and Lay, M. G. (1970a). “Laterally unsupported angles with equal and unequal legs.” Rep. No. MRL 22/2, BHP Melbourne Research Laboratories, Clayton, Australia.
Leigh, J. M., and Lay, M. G. (1970b). “Safe load tables for laterally unsupported angles.” Rep. No. MRL 22/3, BHP Melbourne Research Laboratories, Clayton, Australia.
Standards Australia (SA). (1998). “Steel Structures.” AS4100-1998, Sydney, Australia.
Trahair, N. S. (2002a). “Bearing, shear, and torsion capacities of steel angle sections.” J. Struct. Eng., 128(11), 1394–1398.
Trahair, N. S. (2002b). “Moment capacities of steel angle sections.” J. Struct. Eng., 128(11), 1387–1393.
Trahair, N. S. (2003). “Lateral buckling strengths of steel angle section beams.” J. Struct. Eng., 129(6), 784–791.
Trahair, N. S., (2004). “Biaxial bending of steel angle section beams.” J. Struct. Eng., 130(4), 554–561.
Trahair, N. S. (2005). “Non-linear elastic non-uniform torsion.” J. Struct. Eng., 131(7), 1135–1142.
Trahair, N. S. (2007). “Biaxial bending and torsion of steel equal angle section beams.” J. Struct. Eng., 133(1), 78–84.
Trahair, N. S., and Teh, L. H. (2001). “Second order moments in torsion members.” Eng. Struct., 23, 631–642.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 135 • Issue 5 • May 2009
Pages: 539 - 545
Copyright
© 2009 ASCE.
History
Received: May 27, 2008
Accepted: Dec 5, 2008
Published online: Feb 25, 2009
Published in print: May 2009
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