Deflections of Composite Beams with Web Openings
Publication: Journal of Structural Engineering
Volume 124, Issue 10
Abstract
Procedures for calculating the deflections of composite beams with web openings are described. Initially, a matrix formulation is used. Modeling assumptions are verified by comparison with experimental data, and recommendations for practical application of the matrix analysis procedures are made. The results of the comparison are used to develop a design aid for estimating the maximum deflection of beams with web openings and an expression for calculating the deflection across a web opening. The work demonstrates that, in most cases, a single web opening often has little effect on the total deflection of a composite beam. There are, however, important cases where the effect can be significant. The effects of an opening and of shear deflections are of the same order. Ignoring both the web opening and shear deformation can lead to significant error. The matrix stiffness method, the design aid, and closed form equations provide reasonable estimates of both total deflection and deflection across an opening.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
ASCE Subcommittee on Beams with Web Openings.(1971). “Suggested design guides for beams with web holes.”J. Struct. Div., ASCE, 97(11), 2702–2728.
2.
Benitez, M. A., Darwin, D., and Donahey, R. C. (1990). “Deflections of composite beams with web openings.”SL Rep. No. 90-3, Univ. of Kansas Center for Research, Lawrence, Kan.
3.
Clawson, W. C., and Darwin, D. (1980). “Composite beams with web openings.”SM Rep. No. 4, Univ. of Kansas Center for Research, Lawrence, Kan. Commentary to the load and resistance factor specification for structural steel buildings. (1993). American Institute of Steel Construction, Chicago, Ill.
4.
Donahey, R. C. (1987). “Deflections of composite beams with web openings.”Build. Struct.: Proc., ASCE Struct. Congress, D. R. Sherman, ed., ASCE, Reston, Va., 404–417.
5.
Donahey, R. C., and Darwin, D. (1986). “Performance and design of composite beams with web openings.”SM Rep. No. 18, Univ. of Kansas Center for Research, Lawrence, Kan.
6.
Dougherty, B. K.(1980). “Elastic deformation of beams with web openings.”J. Struct. Div., ASCE, 106(1), 301–312.
7.
Granade, C. J. (1968). “An investigation of composite beams having large rectangular openings in their webs,” MS thesis, University of Alabama, Tuscaloosa, Ala. Load and resistance factor design manual of steel construction. (1993). 2nd Ed., American Institute of Steel Construction, Chicago, Ill.
8.
Lopez, L. A., Dodds Jr., R. H., Rehak, D. R., and Schmidt, R. J. (1994). “Polo Finite: a structural mechanics system for linear and nonlinear analysis.” Tech. Rep., University of Illinois, Urbana-Champaign, Ill.
9.
McCormick, M. M. (1972). “Open web beams—behavior, analysis, and design.”BHP Melbourne Res. Lab. Rep. MRL 17/18, Melbourne Res. Lab., The Broken Hill Proprietary Co. Ltd., Clayton, Australia.
10.
Redwood, R. G., and Wong, P. K. (1982). “Web holes in composite beams with steel deck.”Proc., 8th Canadian Struct. Engrg. Conf., Canadian Steel Construction Council, Willowdale, Ontario, Canada.
11.
Severn, R. T. (1970). “Inclusion of shear deflection in the stiffness matrix for a beam element.”J. Strain Analysis, London, U.K., 5(4), 239–241.
12.
Specification for structural steel buildings. (1989). American Institute of Steel Construction, Chicago, Ill.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 124 • Issue 10 • October 1998
Pages: 1139 - 1147
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Oct 1, 1998
Published in print: Oct 1998
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.