Beam‐Column Behavior of Fabricated Steel Tubular Members
Publication: Journal of Structural Engineering
Volume 118, Issue 5
Abstract
The results of a large‐scale experimental study on fabricated tubular steel members are presented. Twenty‐two specimens with a diameter of 450 mm and lengths varying between 1.5 and 10 m are fabricated and tested under various combinations of axial load and bending moment. Wall thicknesses vary between 4.5 and 8.8 mm, and the measured yield stress varies between 250 and 450 MPa, resulting in specimens with a cross‐sectional slenderness factor of of approximately 7.5 and 9.0; respectively. Laboratory measurements of weld‐induced residual strains and surface geometry of specimens before testing are examined in conjunction with observed behavior and are related to failure modes. The load‐deflection behavior up to and beyond ultimate load is studied, and test results are compared with existing and proposed design rules with respect to local buckling, strength, and stability interaction. Good agreement with stability modeling is seen, and observed differences with strength interaction equations are discussed. Recommendations are made pertaining to the strength calculations of tubulars in the intermediate section slenderness category where local buckling limits the strength between first yield and full plastification.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 118 • Issue 5 • May 1992
Pages: 1213 - 1232
Copyright
Copyright © 1992 ASCE.
History
Published online: May 1, 1992
Published in print: May 1992
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