Retrofitting a Column with an Internal Hinge: Analytical and Numerical Study
Publication: Practice Periodical on Structural Design and Construction
Volume 16, Issue 1
Abstract
This paper examines the buckling of a column with an internal hinge that is retrofitted with a rotational spring to restore some capacity to carry bending moment at the internal hinge location. The problem is solved analytically to obtain the critical buckling load. In addition a numerical solution is obtained using finite elements with the help of the ABAQUS finite-element analysis software. The results are compared, and design curves are obtained that yield the critical buckling load for the column for various values of the rotational spring stiffness and internal hinge location. The increase in strength of the column with the internal hinge wrapped with one or more layers of reinforcing material is then studied. An analytical expression is found to characterize the reinforcing wrap in terms of the stiffness of an equivalent linear elastic rotational spring. The procedure is validated by a finite-element analysis.
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Acknowledgments
Arghya Deb would like to acknowledge the support for this work received through an ISIRD grant from the Office of the Dean, Sponsored Research and Industrial Consultancy, IIT Kharagpur.
References
Chen, W. F., and Lui, E. M. (1987). Structural stability, Elsevier Science, New York.
Hughes, T. J. R. (1987). The finite element method, Prentice-Hall, Englewood Cliffs, N.J.
Sack, R. L. (1989). Matrix structural analysis, PWS-KENT Publishing Co., Boston.
Wang, C. Y. (1987). “Optimum location of an interior hinge on a column.” J. Struct. Eng., 113(1), 161–165.
Wang, C. Y. (2002). “Buckling of an internally hinged column with elastic support.” Eng. Struct., 24, 1357–1360.
Information & Authors
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Published In
Practice Periodical on Structural Design and Construction
Volume 16 • Issue 1 • February 2011
Pages: 24 - 33
Copyright
© 2011 ASCE.
History
Received: Sep 11, 2009
Accepted: Apr 1, 2010
Published online: Apr 7, 2010
Published in print: Feb 2011
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