Model for Cyclic Inelastic Buckling of Steel Braces
Publication: Journal of Structural Engineering
Volume 134, Issue 4
Abstract
The paper presents a model for the inelastic buckling behavior of steel braces. The model consists of a force-based frame element with distributed inelasticity and fiber discretization of the cross section. With this approach, the response of the element can be derived by integration of the uniaxial stress-strain relation of the fibers and can account for kinematic and isotropic hardening as well as the Bauschinger effect of the material. The interaction between axial force and bending moment is thus accounted for. Even though the element only accounts for small deformations in the basic system, large displacement geometry is included in the nonlinear transformation of the force-deformation relation of the basic element following the concept of the corotational formulation. With this approach, two elements for each brace suffice to yield results that match an extensive set of experimental data of braces with different cross sections and slenderness ratios. Even though the model does not account for the effect of local buckling, this phenomenon does not seem to appreciably affect the global response of braces with compact sections.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 134 • Issue 4 • April 2008
Pages: 619 - 628
Copyright
© 2008 ASCE.
History
Received: May 31, 2005
Accepted: Oct 25, 2005
Published online: Apr 1, 2008
Published in print: Apr 2008
Notes
Note. Associate Editor: Donald W. White
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