Strength of Bolted Lap Shear Connections with Advanced High-Strength Steel Sheets
Publication: Journal of Structural Engineering
Volume 150, Issue 1
Abstract
The objective of this work is to investigate the strength of bolted lap shear connections with advanced high-strength steel (AHSS) sheets and the effects of steel ductility on bolted connection behavior. An experimental study on AHSS bolted lap shear connections has been conducted, involving six different steel sheets that have nominal yield stress ranging from 340 to 1,200 MPa and ductility ranging from 3% to 20% in elongation. Four limit states are investigated: bearing, tilting/bearing, net section, and end tear-out. The connection strengths obtained from the tests are compared with strength predictions from relevant design specifications (AISI S100, AS/NZS 4600, EN-1993-1-3) and proposals in the literature. Connections with specific low-ductility AHSS sheets cannot reach full design strengths. Extending the strength reduction factor in the current AISI S100 specification to AHSS sheets is found to provide an adequate correction. Based on the test data, two new continuous strength reduction factors are proposed, one based on ductility as measured by ultimate elongation and a second utilizing true fracture strain as the ductility measure.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request, which include tensile coupon test data and connection test data.
Acknowledgments
This paper is based on the work supported by the National Science Foundation under grant 1760953 as part of the project “Optimization and Application of Next Generation Steels in Construction.” The authors thankfully acknowledge lab manager Nick Logvinovsky for his assistance in specimen preparation and test setup.
Disclaimer
Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
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Published In
Journal of Structural Engineering
Volume 150 • Issue 1 • January 2024
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Feb 7, 2023
Accepted: Sep 7, 2023
Published online: Nov 7, 2023
Published in print: Jan 1, 2024
Discussion open until: Apr 7, 2024
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