High precision strain gauge measurements in areas of high stress concentrations of orthotropic plated bridge decks

Backer, Hans De; Outtier, Amelie; Bogaert, Philippe Van

doi:10.1784/insi.2007.49.7.384

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…Strain sensing is a typical resistive sensing scheme and has been extensively used for structural health monitoring [7,8] and force transducers [2,9]. The signal induced by elastic deformation caused by an external load, in conjunction with subsequent Wheatstone bridges and the associated amplification and filtering circuits, is used to measure the local stress/strain and the magnitude of the applied load.…”

Section: Introductionmentioning

confidence: 99%

A one-dimensional touch panel based on strain sensing

Tsai

et al. 2012

Mechatronics

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Section: Introductionmentioning

confidence: 99%

A one-dimensional touch panel based on strain sensing

Tsai

et al. 2012

Mechatronics

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Monitoring during Refurbishment of Port Infrastructure

Backer¹,

Outtier²,

Schotte³

et al. 2013

IABSE Conference, Rotterdam 2013: Assessment, Upgrading and Refurbishment of Infrastructures

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Monitoring of structural parameters during construction can be an important aid for execution. Especially when studying the long-term behaviour of structures, e.g. build-up of ground pressures or fatigue effects, it can become necessary to resort to monitoring. This research paper discusses two such projects.A first project deals with the refurbishment of a lock door of the Port of Zeebrugge, Belgium. In order to allow for refurbishment, the ground water level in the door chamber had to be lowered considerably, resulting in a variation of the ground pressure on the concrete walls of the lock chamber. As a safety measure large steel struts were added, going through the lock door. Since much uncertainty existed concerning the size of the ground pressure variation, a monitoring system was installed to measure the normal forces in the struts and alarm levels were defined. Initial results pointed out that temperature variation in the longitudinally constrained struts took up a considerable part of the capacity of the struts.A second project is concerned with the refurbishment of part of the counterweight structure of one of the bascule bridges crossing the Van Cauwelaertsluis, which is one of the most important locks allowing entrance to the Port of Antwerp, Belgium. Because of uncertainty about the size of the stress cycles in the movable part during bridge operation, a number of strain gauges are installed during renovation before any of the axles connecting the bridge to the bascule system are installed. Afterwards, stress build up will be monitored during the remaining construction phases, as well as during test operation of the bridge to verify design assumptions. Monitoring will continue afterwards during the first few months of operation.This article gives an overview of these experiences and on the lessons learned concerning power supply, possible electromagnetic interference and structural consequences

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Autonomous systems for strain and vibration measurements

Backer¹,

Outtier²,

Pauw³

et al. 2008

IABSE Congress, Chicago 2008: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure

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When studying the long-term behaviour of large-scale civil structures, it often becomes necessary to resort to monitoring of certain structural parameters. This research paper discusses two such applications. A first prototype was used to monitor strains in a concrete fly-over with CFRP- reinforcements. The second prototype was used recently to monitor the vibrations in a continuous fashion during four weeks of speed tests on a new section of the European High Speed Train network. This article gives an overview of these experiences and on the lessons learned concerning power supply and possible electromagnetic interference in harsh construction site condition. In addition, it describes the intentions to build, a new completely autonomous third prototype for thermal strain monitoring. Furthermore, the most important results of both test cases are discussed in short, including the effectiveness off the CFRP-reinforcement and the measured natural frequencies.

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High precision strain gauge measurements in areas of high stress concentrations of orthotropic plated bridge decks

Cited by 3 publications

References 3 publications

A one-dimensional touch panel based on strain sensing

A one-dimensional touch panel based on strain sensing

Monitoring during Refurbishment of Port Infrastructure

Autonomous systems for strain and vibration measurements

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