Research Article
Sep 1969
Local Plastic Buckling of A514 Steel Members
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VIEW THE REPLYPublication: Journal of the Structural Division
Volume 95, Issue 9
Abstract
Axial-compression tests on 12 cruciform shapes made from ASTM A514 steel plates demonstrated the need to limit the ratio of the flange projection to the flange thickness (b/t) to about 5 in A514 steel to achieve yielding followed by sustained plastic strain (over 3% strain before gradual unloading), and to ensure suitability of A514 steel compression elements for plastic design. The critical plastic local buckling stress for A514 steel members with (b/t) < 5 can be accurately computed from the deformation-theory equation, σc = σy + Et [0.385 (t/b)2—0.005] by using values of σy and ET measured in tension tests, and conservatively computed by using σy = 100,000 psi (the minimum specified for A514 steel) and Et = 220,000 psi. Similarly, the strain corresponding to maximum stress can be predicted approximately by the deformation-theory equation, c = 0.385 (t/b)2.
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Published In
Journal of the Structural Division
Volume 95 • Issue 9 • September 1969
Pages: 1837 - 1850
Copyright
© 1969 American Society of Civil Engineers.
History
Published in print: Sep 1969
Published online: Feb 1, 2021
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Authors
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John F. McDermott, M.ASCE
Sr. Research Engr., US Steel Applied Rese arch Lab., Monroeville, Pa.
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