TECHNICAL PAPERS
Oct 1, 1983

Miter‐Type Navigation Lock Gates

Publication: Journal of Structural Engineering
Volume 109, Issue 10

Abstract

A theoretical analysis for a horizontally framed miter‐type lock gate structure under hydrostatic pressure is presented. A set of nonlinear equations for failure modes of mitered gates is derived by the variational method incorporated with Lagrange multiplier to account for a constraint condition. The unique solution on the load‐deflection curves indicates that there is no other type of buckling mode than snap‐through when the mitered angle is very large. For mitered angle not so large, the failure mode is governed by the flexural yield stress at the center of the gate girder. The result is compared with AISC beamcolumn formula upon which the current design is based. Good agreement is reached if the failure mode is governed by the maximum flexural stress, and thus the beam‐column treatment is justified for practical purposes. Forces in such case can be directly obtained by equilibrium method, and deformation effect can be neglected. For very large angle, however, snap‐through buckling may control the capacity, and the deformation effect considerably reduces the capacity.

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References

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Chang, C. H., “Buckling of Slanted Columns,” Journal of the Engineering Mechanics Division, ASCE, Vol. 100, No. EM4, Proc. Paper 10738, Aug., 1974, pp. 737–756.
2.
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Cheong Siat Moy, F., “Method of Analysis of Laterally Loaded Columns,” Journal of the Structural Division, ASCE, Vol. 100, No. ST5, Proc. Paper 10548, May, 1974, pp. 953–970.
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Engineering and Design‐Lock Gate, Engineering Manual, EM 1110‐2‐2603, U.S. Army Corps of Engineers, Draft, Oct., 1974.
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Go to Journal of Structural Engineering
Journal of Structural Engineering
Volume 109Issue 10October 1983
Pages: 2235 - 2247

History

Published online: Oct 1, 1983
Published in print: Oct 1983

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Authors

Affiliations

Ming Der Chemg
Instr. of Civ. Engrg. Tech., Lakeland Coll., Vermilion‐Alberta, Canada
Michael K. Phang, M. ASCE
Prof. and Chmn. of Civ. Engrg. Dept., Univ. of Miami, Coral Gables, Fla.
Chin Hao Chang
Prof. of Engrg. Mechanics, Univ. of Alabama, University, Ala. 35486

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