Monitoring of an hydraulic structure affected by ASR: A case study

Rivard, Patrice; Ballivy, G.; Gravel, C.; Saint-Pierre, François

doi:10.1016/j.cemconres.2009.09.010

Cited by 31 publications

(13 citation statements)

References 6 publications

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“…The overall objective of this last type of investigation method is to produce an image depicting the distribution of materials and/or their properties (based on mechanical vibratory response) in the structure. The different zones investigated correspond to the variations in the propagation velocity of compression waves, called “primary waves”, through the concrete . The tomographic image is based on three steps: data acquisition, simulation of these data in a synthetic model, and finally the definition of solutions (calculation of wave velocity).…”

Section: Seismic and Acoustic Methodsmentioning

confidence: 99%

“…Figure shows an example that illustrates the type of seismic tomography visual output which can be obtained on a service structure . The variations observed in the velocities are very important and indicate a significant alteration of the material for the upper zones of the dam.…”

Section: Seismic and Acoustic Methodsmentioning

confidence: 99%

“…Localized low velocities are assumed to be caused by cracks in the concrete, rather than by a simple reduction in the modulus of elasticity. When the velocity values are higher than 3000 m/s, the concrete is considered of good quality …”

Section: Seismic and Acoustic Methodsmentioning

confidence: 99%

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Effectiveness of Nondestructive Methods for the Evaluation of Structures Affected by Internal Swelling Reactions: A Review of Electric, Seismic and Acoustic Methods Based on Laboratory and Site Experiences

Metalssi¹,

Godart²,

Toutlemonde³

2013

Exp Techniques

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Internal swelling reactions (ISR) (which mainly comprise alkali‐silica reaction, alkali‐carbonate reaction, delayed ettringite formation, etc) are damage processes that affect the long‐term durability of concrete structures. The reactions are apparently characterized by series of closely spaced, tight map cracks with wide cracks appearing at regular intervals, and excessive tensile stresses in rebars. These phenomena are alarming for affected structure managers as they deal with people safety and structures operation. Moreover, there is no easily implemented way to stop the reactions. Prediction of concrete expansion, structural degradation, and assessment of efficiency and periodicity of repair works are crucial issues. The aim of this work is to explore the applicability of some nondestructive techniques (NDT) of investigations (electric, seismic, and acoustic methods) to differentiate the structure zones affected or not by the ISR for different exposure conditions. The collected experience highlights that the coupling between some of those nondestructive (ND) methods can reduce the measurement uncertainty and eliminates the factors that may influence the characterization of the structure parts affected by ISR. Nevertheless, for a complete structure reassessment, it is also desirable to refer to global geometrical/topographical survey and to destructive analysis methods on some cored samples for chemical analysis, petrography, and residual expansion measurements.

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Section: Seismic and Acoustic Methodsmentioning

confidence: 99%

Section: Seismic and Acoustic Methodsmentioning

confidence: 99%

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Effectiveness of Nondestructive Methods for the Evaluation of Structures Affected by Internal Swelling Reactions: A Review of Electric, Seismic and Acoustic Methods Based on Laboratory and Site Experiences

Metalssi¹,

Godart²,

Toutlemonde³

2013

Exp Techniques

View full text Add to dashboard Cite

show abstract

“…This structure is subjected to a monitoring program because the concrete has been suffering from alkali silicareaction (ASR) for over thirty years. ASR is a deleterious reaction causing the expansion of the concrete and creating a crack network through the structure (Rivard et al, 2010). Fig.…”

Section: Sitementioning

confidence: 99%

Characterization of discontinuities inside massive concrete structures with normal dc resistivity logging

Taillet

Lataste

Rivard

et al. 2015

Journal of Applied Geophysics

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“…Além disso, termopares tipo "T" foram instalados próximos a cada par de strain gauges (barras de reforço), no centro do bloco e na sala onde o experimento foi realizado para correções de temperatura, em caso de necessidade. Técnicas como tomografia, ultra-som em testemunhos e petrografia (RIVARD et al 2010) não foram consideradas por exigir acesso periódico à estrutura.…”

Section: Figura 5 52 -Strain Gauges Aplicados Nas Barras De Reforço unclassified

Contribuição ao desenvolvimento de técnicas de monitoramento remoto para blocos de fundação de edifícios em concreto armado com vistas à durabilidade.

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Monitoring of an hydraulic structure affected by ASR: A case study

Cited by 31 publications

References 6 publications

Effectiveness of Nondestructive Methods for the Evaluation of Structures Affected by Internal Swelling Reactions: A Review of Electric, Seismic and Acoustic Methods Based on Laboratory and Site Experiences

Effectiveness of Nondestructive Methods for the Evaluation of Structures Affected by Internal Swelling Reactions: A Review of Electric, Seismic and Acoustic Methods Based on Laboratory and Site Experiences

Characterization of discontinuities inside massive concrete structures with normal dc resistivity logging

Contribuição ao desenvolvimento de técnicas de monitoramento remoto para blocos de fundação de edifícios em concreto armado com vistas à durabilidade.

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