Effective Cross Sections of Asymmetric Rings on Cylindrical Shells
Publication: Journal of Structural Engineering
Volume 124, Issue 9
Abstract
Rings or ringbeams are often used to stiffen cylindrical tanks, silos, towers, and pressure vessels. A ring acts together with the axisymmetric shell to form a composite structure. The structural analysis of such a composite structure under general loadings is usually not simple, and often has to be numerical. Although the membrane stress in a symmetrical ring stiffener under axisymmetric loadings may be calculated from a simple effective ring analysis, no existing simple method is able to predict the bending stresses caused by either eccentric loading (bending moment) or the use of an asymmetric section as a ring stiffener. In this paper, the deformations of a general unsymmetrical ring stiffener are analyzed using linear shell bending theory. A new rational method of determining both the precise membrane and the bending stresses throughout the discrete ring stiffener using effective ring analysis is devised. The new method is suitable for use in a shell design standard.
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References
1.
Calladine, C. R. (1983). Theory of shell structures. Cambridge University Press, Cambridge, U.K.
2.
Chen, J. F. (1996). “Interpretation of flow and pressures in full scale silos,” PhD thesis, Edinburgh University, Edinburgh, U.K. Eurocode 3: Design of steel structures, part 1.6: General rules—supplementary rules for strength and stability of shell structures . (1998a). CEN, Brussels, Belgium. Eurocode 3: Design of steel structures, part 4.1: Silos . (1998b). CEN, Brussels, Belgium.
3.
Flügge, W. (1973). Stresses in shells. 2nd Ed., Springer-Verlag, Berlin, Germany.
4.
Gaylord, E. H., and Gaylord, C. N. (1984). Design of steel bins for storage of bulk solids. Prentice Hall, Englewood Cliffs, N.J.
5.
Ings, N. L. (1981). “Ring beams.”Structural aspects of steel silos and tanks. School of Civ. and Mining Engrg., University of Sydney, Sydney, Australia.
6.
Lambert, F. W. (1968). The theory and practical design of bunkers. British Construction Steelwork Association, London, U.K.
7.
Pippard, A. J. S., and Baker, J. F. (1957). The analysis of engineering structures. 3rd Ed., Edward Arnold, London, U.K.
8.
“Recommended rules for the design and construction of large welded low-pressure storage tanks.” (1970). API-620, American Petroleum Institute, New York, N.Y.
9.
“Recommended rules for planning, designing and constructing fixed offshore platforms.” (1982). API-RP2A, American Petroleum Institute, New York, N.Y.
10.
Rotter, J. M. (1983a). “Effective cross-sections of ringbeams and stiffeners for bins.”Proc., Int. Conf. on Bulk Mat. Storage Handling and Transp., Institution of Engineers, Newcastle, Australia, 329–334.
11.
Rotter, J. M. (1983b). “Ringbeams for elevated bins and silos.”Proc., Metal Struct. Conf., IEAust, Brisbane, Australia, 111–116.
12.
Rotter, J. M. (1985). “Analysis and design of ringbeams.”Design of steel bins for the storage of bulk solids, J. M. Rotter, ed., University of Sydney, Sydney, Australia, 164–183.
13.
Rotter, J. M. (1987). “The buckling and plastic collapse of ring stiffeners at cone/cylinder junctions.”Proc., Int. Colloquium on Stability of Plate and Shell Struct., Gent, Belgium, 449–456.
14.
Rotter, J. M., Ooi, J. Y., Chen, J. F., Tiley, P. J., Mackintosh, I., and Bennett, F. R. (1995). Flow pattern measurements in full scale silos. British Materials Handling Board, Ascot, U.K. Rules for design, construction and inspection of offshore structures . (1977). Det Norske Veritas, Hovik, Norway.
15.
“SAA unfired pressure vessels code.” (1982). AS1210, Standards Association of Australia, Sydney, Australia.
16.
“Specification for unfired fusion welded pressure vessels.” (1982). BS5500, British Standards Institution, London, U.K.
17.
Teng, J. G. (1996). “Effective area method for collapse strength prediction of complex shell intersections.”Proc., Int. Conf. on Advances in Steel Struct., Pergamon, Elsevier Science, Oxford, U.K., 767–773.
18.
Teng, J. G., and Rotter, J. M.(1991a). “Collapse behavior and strength of steel silo transition junctions. I: Collapse mechanics.”J. Struct. Engrg., ASCE, 117(12), 3587–3604.
19.
Teng, J. G., and Rotter, J. M.(1991b). “Collapse behavior and strength of steel silo transition junctions. II: Parametric study.”J. Struct. Engrg., ASCE, 117(12), 3605–3622.
20.
Trahair, N. S. (1981). “Buckling of compression rings and knuckles.”Structural aspects of steel silos and tanks. School of Civ. and Mining Engrg., University of Sydney, Sydney, Australia.
21.
Trahair, N. S., Abel, A., Ansourian, P., Irvine, H. M., and Rotter, J. M. (1983). Structural design of steel bins for bulk solids. Australian Institute of Steel Construction, Sydney, Australia.
22.
Wolf, C. D. (1983). “Structural design aspects of materials handling plant.”Metal Struct. Conf., IEAust, Brisbane, Australia, 148—158.
23.
Wozniak, R. S. (1979). Steel tanks, structural engineering handbook. 2nd Ed., E. H. Gaylord and C. N. Gaylord, eds., McGraw-Hill, Englewood Cliffs, N.J.
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Copyright © 1998 American Society of Civil Engineers.
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Published online: Sep 1, 1998
Published in print: Sep 1998
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