Load Configuration and Lateral Distribution of NATO Wheeled Military Trucks for Steel I-Girder Bridges
Publication: Journal of Bridge Engineering
Volume 15, Issue 6
Abstract
This paper presents the lateral load distribution of various North Atlantic Treaty Organization (NATO) wheeled military trucks on a simple-span steel I-girder bridge . The military trucks are classified into the military load classification (MLC) system. The MLC trucks demonstrate different load configurations when compared to the standard HS20 truck in terms of wheel-line spacing, number of axles, and weight. A calibrated three-dimensional finite-element analysis is conducted to examine the MLC load effects. The applicability of the AASHTO LRFD provisions is evaluated using 72 different load models. The wheel-line spacing and weight of the MLC trucks cause different flexural behavior and load distributions of the bridge when compared to those of HS20. The current AASHTO LRFD approach to determine live load distribution factors may be reasonably applicable to the MLC trucks, including approximately 20% of conservative predictions.
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Acknowledgments
The writers wish to acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC) to the first writer.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 15 • Issue 6 • November 2010
Pages: 740 - 748
Copyright
© 2010 ASCE.
History
Received: Jan 16, 2009
Accepted: Feb 24, 2010
Published online: Mar 4, 2010
Published in print: Nov 2010
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