Innovative structural health monitoring for Tamar Suspension Bridge by automated total positioning system

Koo, Ki-Young; List, David; Cole, Richard; Wood, Trent

doi:10.1201/b10430-75

Cited by 6 publications

(3 citation statements)

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“…The Tamar Suspension Bridge (Figure 1) in the U.K. provides an example of how bridge management and academic researchers can work together to improve the engineering community's knowledge. Thanks to a collaboration with the Tamar Bridge and Torpoint Ferry Joint Committee, the Tamar Bridge has been the subject of on-going research by the Vibration Engineering Section (VES) at The University of Sheffield since 2005 (Brownjohn & Carden, 2008;Brownjohn et al, 2009;Brownjohn, Pavic, Carden, & Middleton, 2007;Cross, Worden, Koo, & Brownjohn, 2010;Koo, Brownjohn, List, Cole, & Wood, 2010). This paper presents new insight gained on the thermal behaviour of the Tamar Suspension Bridge, building on previous findings (de Battista, Westgate, , which showed the dependence of the quasi-static displacement response of the bridge deck on several structural and environmental factors.…”

Section: Introductionmentioning

confidence: 99%

Measuring and modelling the thermal performance of the Tamar Suspension Bridge using a wireless sensor network

Battista

Brownjohn

Tan

et al. 2014

Structure and Infrastructure Engineering

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Suspension Bridge using a wireless sensor networkA study on the thermal performance of the Tamar Suspension Bridge deck in Plymouth, U.K., is presented in this paper. Ambient air, suspension cable, deck and truss temperatures were acquired using a wired sensor system. Deck extension data were acquired using a two-hop wireless sensor network. Empirical models relating the deck extension to various combinations of temperatures were derived and compared. The most accurate model, which used all the four temperature variables, predicted the deck extension with an accuracy of 99.4%.Time delays ranging from 10 minutes to 66 minutes were identified between the daily cycles of the air temperature and of the structural temperatures and deck extension. However, accounting for these delays in the temperature -extension models did not improve the models' prediction accuracy. The results of this study suggest that bridge design recommendations are based on overly-simplistic assumptions which could result in significant errors in the estimated deck movement, especially for temperature extremes. These findings aim to help engineers better understand the important aspect of thermal performance of steel bridges. This paper also presents a concise study on the effective use of off the shelf wireless technology to support structural health monitoring of bridges.

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Section: Introductionmentioning

confidence: 99%

Measuring and modelling the thermal performance of the Tamar Suspension Bridge using a wireless sensor network

Battista

Brownjohn

Tan

et al. 2014

Structure and Infrastructure Engineering

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Section: Introductionmentioning

confidence: 99%

“…Koo and et al (2010;2013) presents a structural health monitoring system using an automated Total Positioning System and its application to a 3-span suspension bridge. Fifteen reflectors were installed on the bridge deck, on top and wall of towers and on top of side towers, monitored for a period of three months to measure the longitudinal, vertical and lateral movements of the bridge (Koo and et al, 2010;2013).This paper presents the results of an on-going project whose ultimate goal is the real-time photogrammetric monitoring the structural deformations of the second Bosphorus Bridge. The final aim of the project is to design and to realize an operational and on-line photogrammetric monitoring system for deformation measurements of the bridge.…”

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confidence: 99%

Photogrammetric Deformation Monitoring of the Second Bosphorus Bridge in Istanbul

Avşar

Akça

Altan

2014

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:Improving the efficiency of bridge inspection and minimizing the impact of dynamic load on the long term deterioration of the bridge structure reduces maintenance and upkeep costs whilst also improving bridge longevity and safety. This paper presents the results of an on-going project whose ultimate goal is the real-time photogrammetric monitoring the structural deformations of the second Bosphorus Bridge of Istanbul. INTRODUCTIONBridges are exposed to intensive and dynamic loads, unsteady weather conditions, material fatigue and aging process. All these factors cause deformations on the construction parts. The importance of the monitoring and early identifying the bridge deformations is essential once the maintenance, repair and even the reconstruction costs are considered.Monitoring campaigns of long bridges are becoming more and more common as the research fields of structural health monitoring and performance monitoring grow.A very first photogrammetric bridge monitoring project, including a condition survey and vertical deflection measurement, was carried out by Bales and Hilton in 1985. The bridge has a 3-span continuous structure with a total length of 139 m. The length of the center span was measured as 51 m. The camera was positioned at three locations under mid-span facing up at a distance of about 10.8 m. The average difference between photogrammetric measurements and level readings was approximately 3 mm (Bales and Hilton, 1985).Kim (1989) performed a long-term deformation monitoring of a 526 m long highway bridge using photogrammetry. The project utilized a camera with a 150 mm lens. The distance between the bridge and the camera was 122 m. Images were recorded on conventional 230 x 230 mm film and were analyzed using a program developed specifically for the project. It was concluded that the precision of the deformation measurement using photogrammetry was within ±14 mm in the length and height directions, and ±30 mm in the width direction (Kim, 1989).Leitch (2002) and Jauregui et al. (2003) conducted a comprehensive study on bridge deflection measurement using close-range photogrammetry. Studies were performed on a laboratory steel beam and on two field bridges. The first bridge tested was a single-span, prestressed concrete bridge with a length of 32.2 m. The second was a simple-supported steel girder bridge, under truck loading and having 7-spans. In the experiments of the first bridge, photogrammetric measurements of the initial camber were compared with level rod readings.The maximum deviation of the two measurements was within ±17 mm for four of the girders, and 28 mm for the remaining girder (Leitch, 2002). For the second experiment; the photogrammetric measurement results were compared with those obtained from finite element analysis, level rod readings, and curvature-based measurements derived from strain gages.The maximum deflection was about 8 mm. The differences in deflection measurements from photogrammetry, curvature, and the level rod were within 0.5-1.5 mm for all girders a...

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Sensing solutions for assessing and monitoring of bridges

Koo

Battista

2022

Sensor Technologies for Civil Infrastructures

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Innovative structural health monitoring for Tamar Suspension Bridge by automated total positioning system

Cited by 6 publications

References 0 publications

Measuring and modelling the thermal performance of the Tamar Suspension Bridge using a wireless sensor network

Measuring and modelling the thermal performance of the Tamar Suspension Bridge using a wireless sensor network

Photogrammetric Deformation Monitoring of the Second Bosphorus Bridge in Istanbul

Sensing solutions for assessing and monitoring of bridges

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