Special Issue "Weigh-in-Motion (WIM)"

Guest Editor
Prof. Dr. Eugene O´Brien
University College Dublin School of Architecture, Landscape & Civil Engineering Newstead Building Belfield, Dublin 4
Website: http://www.ucd.ie/research/people/archlandscapecivileng/professoreugeneobrien/
E-mail:

Related Conference
International Conference on Heavy Vehicles Paris’2008
Weigh-In-Motion: ICWIM 5; http://hvparis2008.free.fr/index.php
International Society for Weigh-In-Motion (ISWIM); http://iswim.free.fr/index.php?lg=en

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weigh-in-motion

Title: Development of a BWIM system on a Self-anchored Suspension Bridge
Authors: Jungwhee Lee (Researcher, Research Institute of Industrial Science and Technology, KOREA); Sungkon Kim (Corresponding author) (Professor, Seoul National University of Technology, KOREA); Minseok Park (Researcher, Korea Highway Corporation, KOREA)
Abstract: This paper describes the development procedures of a Bridge Weigh-in-Motion (BWIM) system for a self-anchored suspension bridge with the superstructure consists of steel truss and steel deck. Since steel decks are stiffened with a lot of longitudinal U-ribs and lateral diaphragms, placement of sensors has to be decided carefully. Moreover, structural complexity makes it difficult to apply conventional influence line theory for steel decks. Thus, a series of preliminary 3-D finite element analysis were performed to determine efficient sensor locations and to generate theoretical influence lines for each sensors. Commercial FEM software, LS-DYNA was utilized for numerical study since dynamic interaction between the bridge and vehicles can be considered effectively with this software. A total of 14 channels of dynamic strain gauges are installed with stand-alone-type embedded system in the superstructure. This embedded system supplied by National Instrument® does its parts of data acquisition, signal processing, major computation of extracting vehicle information, and transmission of resulting information through the exclusive fiber-optic networks. This type of system organization, which can be an example of ubiquitous computing, makes the whole system effective since major computation works are done by the embedded system in-situ, and consequently the burdens of main server and networks are reduced significantly. A series of truck running test were performed during the development period, and the developed BWIM system was validated with this tests. The BWIM system is currently integrated to the main SHMS(structural health monitoring system) of the suspension bridge.