Proposed Revisions to the Current Charpy V-Notch Requirements for Structural Steel Used in U.S. Bridges
Publication: Journal of Bridge Engineering
Volume 19, Issue 1
Abstract
The purpose of the research presented in this paper is to reexamine the current Charpy V-notch (CVN) requirements for steel bridges in the United States using state-of-the-art applied fracture mechanics analysis. Proposed revisions to the current CVN requirements are introduced. It is shown that, in general, the typical fracture toughness implied by current minimum CVN requirements results in a trend of decreasing resistance to brittle fracture as the minimum specified yield strength grade increases. The results also show that fracture resistance for the current minimum CVN requirements for the three AASHTO temperature zones is inconsistent for different high-performance steel (HPS) grades. A realignment of the current CVN test temperatures and required notch energy is proposed by normalizing all grades to the crack tolerance associated with the AASHTO yield strength grade 36 ksi steel CVN requirements.
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Acknowledgments
This project was funded by the FHWA. The opinions expressed in this paper are those of the authors and do not necessarily reflect the official position of the FHWA or their respective employers.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 19 • Issue 1 • January 2014
Pages: 131 - 140
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jun 5, 2011
Accepted: Feb 19, 2013
Published online: Feb 21, 2013
Published in print: Jan 1, 2014
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