Monitoring of Changes in Bridge Response Using Weigh-In-Motion Systems

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Title: Monitoring of Changes in Bridge Response Using Weigh-In-Motion Systems
Authors: Cantero, Daniel
González, Arturo
Basu, Biswajit
Permanent link: http://hdl.handle.net/10197/6231
Date: Jul-2013
Abstract: Weigh-In-Motion (WIM) and Bridge Weigh-In-Motion (B-WIM) are systems that allow obtaining the axle weights of road vehicles in motion, at normal traffic speeds. While WIM employs sensors embedded in the road pavement, B-WIM use the strain recordings of a bridge to infer the traversing vehicle axle weights. Both systems have been heavily improved over the past decades, and commercial versions are currently in operation. The two main applications of these systems are: (1) to assess the traffic loading on the infrastructure, and (2) to enforce the maximum weight limits. This paper suggests a novel application of these two systems to identify changes in bridge stiffness. It requires the bridge to be instrumented with a B-WIM system and a WIM system nearby. The principle is to use both systems to evaluate the gross weight of vehicles passing over the bridge and correlate their predictions. Changes in correlation of the predicted axle weights over time will indicate either structural damage or faulty sensor. A finite element model of a coupled vehicle-bridge system with different damage scenarios is used to test the approach numerically. Vehicle mechanical properties and speeds are randomly sampled within a Monte Carlo simulation. Results show how correlation changes as damage increases and how this correlation can be employed as a damage indicator.
Type of material: Journal Article
Publisher: Trans Tech Publications
Copyright (published version): 2013 Trans Tech Publications
Keywords: Weigh-in-motion;Vehicle-bridge interaction;Damage detection;Bridge health monitoring
DOI: 10.4028/www.scientific.net/KEM.569-570.183
Language: en
Status of Item: Peer reviewed
Appears in Collections:Civil Engineering Research Collection

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