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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
A Virtual Work Approach to Modeling the Nonlinear Behavior of Steel Frames
Author(s)
Barry T. Rosson
Full-Text PDF
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DOI:10.17265/1934-7359/2018.05.001
Affiliation(s)
Department of Civil, Environmental and Geomatics Engineering, Florida Atlantic University, Boca Raton, FL 33431, USA
ABSTRACT
The stiffness reduction is studied in detail of compact W-Shapes (wide-flange steel
shapes) that results from
yielding of the cross-section due to uniaxial bending and axial compression.
Three-dimensional m-p-t surface plots
developed from detailed fiber element models of a W8x31 are used to develop a
generalized material model for direct implementation in the virtual work
method. A portal steel frame is used to illustrate the virtual work method with
the nonlinear material model in a
first-order, inelastic analysis implementation and in a second-order, inelastic
analysis condition. The nonlinear modeling capabilities of MASTAN2 are
used to verify the accuracy of the virtual work results and are found to be in
very close agreement.
KEYWORDS
Nonlinear analysis, steel beam-columns, stiffness reduction, material model, virtual work.
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