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Article
Beam Element Material Model for Rotary-Straightened Steel W-Shapes
Author(s)
Barry T. Rosson
Full-Text PDF XML 417 Views
DOI:10.17265/1934-7359/2021.02.001
Affiliation(s)
Department of Civil, Environmental and Geomatics Engineering, Florida Atlantic University, Boca Raton, FL 33431, USA
ABSTRACT
An inelastic material model
that was previously developed by the author for standard W-Shapes was adapted
for use to model the behavior and strength of rotary-straightened hot rolled W-Shape
sections. Using a published residual stress model for these W-Shapes, limit
load analyses were conducted using the material model in MASTAN2 and were
compared with published finite element results. The material model required an
adjustment to the initial yield moment conditions and residual stress ratios.
Comparisons with published results indicate that these minor modifications were
sufficient to provide very good modeling agreement. The previously developed
material model can be used effectively to model the limit load conditions of
rotary-straightened hot rolled W-Shape beams and beam-columns in steel frames.
The effect of rotary-straightening W-Shapes is more significant for minor axis
bending conditions and this becomes more pronounced as the floor load
magnitudes increase.
KEYWORDS
Nonlinear analysis,steel buildings,stiffness reduction,material model.
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