Testing and monitoring of a centenary arch bridge

Figueiras, Joaquim; Félix, Carlos; Costa, Bruno J. Afonso

doi:10.1080/15732470412331289369

Cited by 14 publications

(5 citation statements)

References 6 publications

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“…Due to the high degree of automation and continuous operation with high measurement accuracy, HLSs have been widely applied in difficult circumstances such as conditions involving high radiation, high risk, limited space, and air turbulence. For example, successful monitoring of bridge variations with HLSs have been reported in [2][3][4][5][6], and the measurement results obtained showed a satisfied agreement with the results of strain and stress measurements. Moreover, continuous long-term monitoring results obtained from HLS have provided essential information for deformation modeling and for guaranteeing the structural safety of bridges.…”

Section: Introductionmentioning

confidence: 60%

“…Combining (1), (2), and (3) yields Journal of Sensors Therefore, we can calculate the relative settlement of any linked monitoring point and reference point using the distance measurements between the water levels and the vessel assembly planes (i.e., h j1 , h j2 , h j3 , … , h ji , … , h jn ) obtained by the sensors.…”

Section: Working Principle Of Hydrostatic Leveling Systemsmentioning

confidence: 99%

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Power Transmission Tower Monitoring with Hydrostatic Leveling System: Measurement Refinement and Performance Evaluation

Zhang

et al. 2018

Journal of Sensors

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A hydrostatic leveling system (HLS) is an automated high-accuracy measurement technology widely used for vertical displacement monitoring. This paper focuses on evaluating the performance of HLS for monitoring the deformation of a power transmission tower base together with a slope sensor and displacement meter. The monitoring results show that HLS measurements are strongly affected by the environmental temperature. Therefore, to obtain the actual deformation of a monitoring target, the measurements should be further processed to reduce the effect of temperature on the result. To this end, four data processing schemes are proposed, which are based on the frequency of processing (i.e., day by day, monthly, quarterly, or annually). The results demonstrate that the quarterly processing scheme effectively reduces the impact of temperature on deformation measurements and therefore provides the most accurate results among the four schemes considered. Since after correction, the HLS measurements are consistent with the independent monitoring results obtained from the slope sensor and displacement meter, the proposed correction strategy is workable and might be considered for similar monitoring scenarios in future.

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Section: Introductionmentioning

confidence: 60%

Section: Working Principle Of Hydrostatic Leveling Systemsmentioning

confidence: 99%

Power Transmission Tower Monitoring with Hydrostatic Leveling System: Measurement Refinement and Performance Evaluation

Zhang

et al. 2018

Journal of Sensors

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“…Therefore, the vertical displacements (VD) were measured using a specific electric leveling system developed at LABEST consisting in a hydraulic circuit through which vertical movements of the points under measurement are associated to the variation of liquid pressure [25]. A pressure sensor used to measure the change of liquid pressure is depicted in Fig.…”

Section: The Measurement Systemsmentioning

confidence: 99%

Post-rehabilitation assessment of a centenary steel bridge through numerical and experimental analysis

Cavadas¹,

Rodrigues²,

Félix³

et al. 2013

Journal of Constructional Steel Research

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“…The existing background of monitoring structural deflections attests the efficiency of this procedure which is more than 40 years old. [19][20][21]…”

Section: Introductionmentioning

confidence: 99%

Fiber-optic-based displacement transducer to measure bridge deflections

Rodrigues

Félix

Figueiras

2010

Structural Health Monitoring

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Structural health monitoring is an emerging area of strategic engineering with a great potential for extending the service life of civil infrastructures and reducing their maintenance costs. In spite of the deflection measurement being one of the main parameters for assessing the real state of a bridge, the measurement techniques and the existing deflection transducers often do not respond to the necessities of structural monitoring. Therefore, a novel displacement transducer to measure bridge deflections based on noncontact measurement technique supported by the liquid leveling method was developed. The measurement of bridge deflections is performed using a hydrostatic level position along the structure as an absolute reference and without any external physical reference to the ground. Fiber-optic sensors based on fiber Bragg grating technology are the sensing units of this original bridge deflection transducer. The transducer performance obtained in a set of experimental tests has shown an accurate linear response and a very good behavior under the environmental conditions simulated in a climatic chamber. A field application at the Lezíria Bridge across the Tagus River, Portugal, evinces the ability of the present transducer to be applied in both temporary and permanent structural health monitoring systems with automatic and remote data acquisition.

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Testing and monitoring of a centenary arch bridge

Cited by 14 publications

References 6 publications

Power Transmission Tower Monitoring with Hydrostatic Leveling System: Measurement Refinement and Performance Evaluation

Power Transmission Tower Monitoring with Hydrostatic Leveling System: Measurement Refinement and Performance Evaluation

Post-rehabilitation assessment of a centenary steel bridge through numerical and experimental analysis

Fiber-optic-based displacement transducer to measure bridge deflections

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