Bridge Weigh-in-Motion Algorithms Based on the Field Calibrated Simulation Model
Publication: Journal of Infrastructure Systems
Volume 23, Issue 1
Abstract
Most of the commercially available bridge weigh-in-motion (B-WIM) systems are based on an algorithm developed by Moses. The performance of this method was generally acceptable for estimating gross vehicle weight (GVW) but can be inadequate for estimating single axle load. Two alternative algorithms for the identification of vehicle axle loads are presented in this paper based on field verified simulation model using the semirigid frame system with multiple simplified span bridges. Both algorithms are based on the simulation of the entire bridge, representing realistic boundary conditions, bridge geometry properties, and field environment from field B-WIM testing results. The first alternative algorithm includes adjusting the experimental weight-in-motion (WIM) moment of the testing span from the simulation model to perform vehicle weight calculation. The second algorithm includes applying the simulated influence line from the simulation model to calculate the vehicle weight. Both approaches demonstrate significant improvements on the accuracy of vehicle weight for a bridge on the U.S. Highway 78 (US-78) by B-WIM testing.
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Acknowledgments
The authors gratefully acknowledge funding and support provided by the National Science Foundation (NSF) for this research project (CMMI-1100742).
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Information
Published In
Journal of Infrastructure Systems
Volume 23 • Issue 1 • March 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Sep 28, 2013
Accepted: Feb 4, 2016
Published online: Apr 8, 2016
Discussion open until: Sep 8, 2016
Published in print: Mar 1, 2017
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