Assessing Accuracy of Bridge Weigh-in-Motion on Least Favorable Bridge Type: Voided Slab Bridge Case Study
Keywords:
Bridge Weigh-In-Motion (B-WIM), voided slab bridge, dynamic amplification factor (DAF), accuracy class, calibration procedureAbstract
The Bridge Weigh-in-Motion (B-WIM) system is a non-destructive means of gathering traffic loading information, using an existing bridge as a weighing scale to determine the weights of vehicles passing over it. This system can be applied to almost any type of bridge, provided that the distance between the two furthest points affecting the measurement, known as the influence line, is less than about 40 m. In this study, the B-WIM method was tested on a least favorable type of bridge, namely a single-span voided concrete slab bridge, located in a heavy industrial truck traffic area between Cikande and Rangkasbitung, Indonesia. The accuracy of the B-WIM system was evaluated using the calibration procedure regulated in European COST 323, which categorizes the accuracy class of a WIM measurement. The results showed that the average deviation for the gross vehicle weight of vehicles passing over the bridge was less than 10%. Thus, it was concluded that the B-WIM system can provide accurate measurements of vehicle weight, with accuracy class B(10). This study provides valuable information for transportation authorities and bridge engineers, particularly in areas where the ideal type of bridge for B-WIM measurements is not available. It also highlights the importance of regularly monitoring and evaluating the accuracy of B-WIM systems to ensure reliable data for transportation planning and infrastructure design
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References
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