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Load Configuration and Lateral Distribution of NATO Wheeled Military Trucks for Steel I-Girder Bridges |
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| Authors: | Yail J Kim Rusmir Tanovic R Gordon Wight |
| Affiliation: | 1Assistant Professor, Dept. of Civil Engineering, North Dakota State Univ., Fargo, ND 58108 (corresponding author). E-mail: jimmy.kim@ndsu.edu 2Associate Professor, Dept. of Civil Engineering, Royal Military College of Canada, Kingston, ON, Canada. E-mail: tanovic-r@rmc.ca 3Associate Professor and Head, Dept. of Civil Engineering, Royal Military College of Canada, Kingston, ON, Canada. E-mail: Gordon.Wight@rmc.ca |
| 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 (L = 36?m). 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. |
| Keywords: | Finite element method Live loads Load distribution Military engineering Plates Bridges Girder Trucks |