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Title
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Stiffness Reduction of Steel W-Shapes: Comparison of New Inelastic Material Model with the AISC Inelastic Material Model.
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Creator
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Gurneian, Harout, Rosson, Barry, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
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Abstract/Description
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This paper focuses on illustrating the effectiveness of the new material model, ππ΅ππ
in comparison with the Specifications for Structural Steel Buildings (2016) material model, ππ΄πΌππΆ , against a detailed finite element model to determine the accuracy of modeling the inelastic behavior of steel W-Shapes. A total of seven steel columns were analyzed, using a W8x31 section, and eleven benchmark frames to compare the performance of the two material models. An ultimate strength study was conducted...
Show moreThis paper focuses on illustrating the effectiveness of the new material model, ππ΅ππ
in comparison with the Specifications for Structural Steel Buildings (2016) material model, ππ΄πΌππΆ , against a detailed finite element model to determine the accuracy of modeling the inelastic behavior of steel W-Shapes. A total of seven steel columns were analyzed, using a W8x31 section, and eleven benchmark frames to compare the performance of the two material models. An ultimate strength study was conducted using the following slenderness ratios, L/r, of 40, 60, 80, 100, 120, 160, and 200 and oriented such that minor-axis bending occurs. The benchmark frames were modeled under a limit load analysis to illustrate the magnitude of stiffness reduction considering both major and minor-axis bending. Lateral displacements were recorded and compared for the eleven frames up to the collapse condition. Additional information is provided discussing the capabilities of the two material models and their performance when compared to a detailed finite element model.
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Date Issued
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2019
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PURL
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http://purl.flvc.org/fau/fd/FA00013314
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Subject Headings
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Steel W-shapes, Stiffness reduction, Materials--Models, American Institute of Steel Construction
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Format
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Document (PDF)
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Title
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Stiffness Reduction of Steel W-Shapes: Comparison Between the Modified Tangent Modulus and a New Inelastic Material Model.
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Creator
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Villalon-Camacho, Teresa, Rosson, Barry, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
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Abstract/Description
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This research focused on demonstrating the effectiveness of a new inelastic material model, ΟBTR, and was compared with an existing modified tangent modulus model, ΟTM, at matching the limit load response of detailed finite element models of steel frames. The influence of stiffness reduction was studied on seven W8x31 columns and eleven benchmark frames. The column study considered minor axis bending with L/r ratios of 40, 60, 80, 100, 120, 180, and 200. Limit load analyses were conducted on...
Show moreThis research focused on demonstrating the effectiveness of a new inelastic material model, ΟBTR, and was compared with an existing modified tangent modulus model, ΟTM, at matching the limit load response of detailed finite element models of steel frames. The influence of stiffness reduction was studied on seven W8x31 columns and eleven benchmark frames. The column study considered minor axis bending with L/r ratios of 40, 60, 80, 100, 120, 180, and 200. Limit load analyses were conducted on steel frames with major-axis and minor-axis bending. The extent of yielding and lateral displacements were evaluated for all benchmark frames at the collapse condition. Discussion is given regarding the two material models and their ability to match the limit load responses of the finite element models.
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Date Issued
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2019
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PURL
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http://purl.flvc.org/fau/fd/FA00013276
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Subject Headings
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Steel, Structural, Residual stresses, Inelastic materials, Tangent modulus
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Format
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Document (PDF)
