Adaptation of Cross Entropy optimisation to a dynamic Bridge WIM calibration problem

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Title: Adaptation of Cross Entropy optimisation to a dynamic Bridge WIM calibration problem
Authors: Dowling, Jason
O'Brien, Eugene J.
González, Arturo
Permanent link: http://hdl.handle.net/10197/4858
Date: Nov-2012
Abstract: Moving Force Identification (MFI) theory can be used to create an algorithm for a Bridge Weigh-in-Motion (WIM) system that can produce complete force histories of the loads that have traversed a bridge structure. MFI is based on general inverse theory, however, and calibration of such a system requires a complete Finite Element (FE) model of the bridge to be available for implementation in the field. This is something that is often infeasible in practice as FE models created using theoretical values for material properties bear a poor relation to reality. The Cross Entropy optimisation method has been adapted here to address this calibration problem. The general system FE global mass and stiffness matrices of the bridge FE model are found by best fit optimisation to match field measurements. In this fashion a fully automated calibration procedure is developed for an MFI algorithm. This system is tested theoretically using three different FE plate models, coupled with a 3-dimensional vehicle model, allowing for Vehicle–Bridge Interaction (VBI).
Type of material: Journal Article
Publisher: Elsevier
Copyright (published version): 2012 Elsevier
Keywords: Bridge WIM;Weigh-in-Motion;Cross Entropy;Optimisation;Vehicle–Bridge Interaction;VBI
DOI: 10.1016/j.engstruct.2012.05.047
Language: en
Status of Item: Peer reviewed
Appears in Collections:Earth Institute Research Collection
Civil Engineering Research Collection

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