Research on BWIM Method Integrated with Geomagnetic Positioning and Strain Area Lateral Transfer Matching for Multi-Lane Bridge
This study presents a Bridge Weigh-in-Motion(BWIM)method that integrates with geomagnetic positioning and strain area lateral transfer matching,which makes the vehicle signal extraction and lateral positioning easier for a multi-lane bridge under large traffic flow.This method utilizes the geomagnetic matrix vector characteristics to build up a 1-D convolution neural network(1D-CNN)to identify vehicle amount and lateral spacing between vehicles when multiple vehicles passing the bridge,subsequently,the load identification calculation method based on strain area lateral transfer matching is used to identify vehicle weights,together with the measured strain response and vehicle payload.A multi-lane hollow core beam bridge in Wuhan was used as a case.Vehicle lateral position positioning tests were performed.Calibration tests were conducted to obtain the actual influence surfaces of the bridge by the dynamic strain response calculation.Tests were carried out in two scenarios of one vehicle passing through the bridge and multiple vehicles passing through the bridge;Based on the cross-correlation algorithm,the vehicle velocity is inverted,furthermore,the vehicle weight is identified,and the identification accuracy is analyzed.It is demonstrated that the presented method can accurately identify the vehicle amount and lateral positions,with a lateral position identification accuracy maintained at about 96％,vehicle velocity identification error below 5％.In the scenario of single vehicle passing,the vehicle weight identification error is below 2％,while below 5％in the multiple vehicles passing scenario.The method presented can remarkably reduce the calculation complexities and disruption of dynamic response,with ensured the vehicle weight identification accuracy,which is also applicable in the scenario of multiple vehicles passing.
bridge engineeringvehicle load identificationgeomagnetic positioning methodBWIM systemmulti-lanevehicle weightlateral positionfield test
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维普
