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Proposed panel zone model for seismic design of steel moment-resisting frames

Proposed panel zone model for seismic design of steel moment-resisting frames
Proposed panel zone model for seismic design of steel moment-resisting frames
This paper proposes a new mechanics-based model for the seismic design of beam-to-column panel zone joints in steel moment-resisting frames. The model is based on realistic shear stress distributions retrieved from continuum finite element (CFE) analyses of representative panel zone geometries. Comparisons with a comprehensive experimental data set suggest that the proposed model predicts the panel zone stiffness and shear strength with a noteworthy accuracy, even in panel zones featuring columns with thick flanges (thicker than 40 mm), as well as in cases with high beam-to-column aspect ratios (larger than 1.5). In that respect, the proposed model addresses the limitations of all other available models in the literature. If doubler plates are deemed necessary in the panel zone design, the CFE simulations do not depict any doubler-to-column web shear stress incompatibility, provided the current detailing practice is respected. Hence, the total thickness of the column web and doubler plates should be directly used in the proposed panel zone model. The panel zone shear strength reduction due to the axial load effects should be based on the peak axial compressive load, including the transient component due to dynamic overturning effects in exterior joints. It is found that the commonly used von Mises criterion suffices to adequately predict the shear strength reduction in the panel zone.
Balanced design, Beam-to-column connections, Doubler plate ineffectiveness, Panel zone model, Panel zone shear resistance, Steel moment-resisting frames
0733-9445
Skiadopoulos, Andronikos
81fe500c-4200-444b-9749-19a60254a1b3
Elkady, Ahmed
8e55de89-dff4-4f84-90ed-6af476e328a8
Lignos, Dimitrios G.
9f55ad65-7b12-4ad6-972c-5a967ec0497b
Skiadopoulos, Andronikos
81fe500c-4200-444b-9749-19a60254a1b3
Elkady, Ahmed
8e55de89-dff4-4f84-90ed-6af476e328a8
Lignos, Dimitrios G.
9f55ad65-7b12-4ad6-972c-5a967ec0497b

Skiadopoulos, Andronikos, Elkady, Ahmed and Lignos, Dimitrios G. (2021) Proposed panel zone model for seismic design of steel moment-resisting frames. Journal of Structural Engineering, 147 (4), [04021006]. (doi:10.1061/(ASCE)ST.1943-541X.0002935).

Record type: Article

Abstract

This paper proposes a new mechanics-based model for the seismic design of beam-to-column panel zone joints in steel moment-resisting frames. The model is based on realistic shear stress distributions retrieved from continuum finite element (CFE) analyses of representative panel zone geometries. Comparisons with a comprehensive experimental data set suggest that the proposed model predicts the panel zone stiffness and shear strength with a noteworthy accuracy, even in panel zones featuring columns with thick flanges (thicker than 40 mm), as well as in cases with high beam-to-column aspect ratios (larger than 1.5). In that respect, the proposed model addresses the limitations of all other available models in the literature. If doubler plates are deemed necessary in the panel zone design, the CFE simulations do not depict any doubler-to-column web shear stress incompatibility, provided the current detailing practice is respected. Hence, the total thickness of the column web and doubler plates should be directly used in the proposed panel zone model. The panel zone shear strength reduction due to the axial load effects should be based on the peak axial compressive load, including the transient component due to dynamic overturning effects in exterior joints. It is found that the commonly used von Mises criterion suffices to adequately predict the shear strength reduction in the panel zone.

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Accepted/In Press date: 7 October 2020
e-pub ahead of print date: 18 January 2021
Published date: 1 April 2021
Keywords: Balanced design, Beam-to-column connections, Doubler plate ineffectiveness, Panel zone model, Panel zone shear resistance, Steel moment-resisting frames

Identifiers

Local EPrints ID: 446625
URI: http://eprints.soton.ac.uk/id/eprint/446625
ISSN: 0733-9445
PURE UUID: 73434b67-5e80-4073-9bc8-fe8c4d93dd1b
ORCID for Ahmed Elkady: ORCID iD orcid.org/0000-0002-1214-6379

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Date deposited: 16 Feb 2021 17:32
Last modified: 06 Jun 2024 02:06

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Contributors

Author: Andronikos Skiadopoulos
Author: Ahmed Elkady ORCID iD
Author: Dimitrios G. Lignos

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