Search

Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The R.H. Saunders dam is one of over one hundred concrete dams, worldwide, suffering from structural and operational problems due to the expansion of concrete resulting from alkali–aggregate reaction. A laboratory test methodology for measuring the residual expansion rate in these dams with simulation of field environment has been developed. This paper describes the test principles and method of interpretation of the different tests developed. Results of various expansion tests performed on samples recovered from the R.H Saunders dam (Canada) are presented. Results showed that the expansion rates measured in laboratory are consistent with those measured by extensive instrumentation in the field (in situ rebar tests, levelling data, stress meters, and in situ overcoring data). It is believed that the test methodology developed provides the necessary and inexpensive tools for measuring the stress-dependent residual expansion potentials in concrete dams. It would also have an impact on the design of remedial measures and the prediction of future performance because of the reliability and versatility of the test method.Key words: dams, concrete, expansion, alkalis, aggregate, reaction, cement.L'ouvrage de retenue en béton R.H. Saunders, parmis une centaine à travers le monde, souffre de problèmes structuraux et opérationnels liés à l'expansion du béton suite à une réaction alcali–granulat. Une méthodologie basée sur des tests en laboratoire simulant l'environnement du terrain a été développée pour mesurer la vitesse de l'expansion résiduelle dans ces barrages. Cette étude décrit les principes des tests et la méthode afin d'interpréter les différents tests développés. Les résultats des différents tests d'expansion effectués sur des spécimens provenant du barrage R.H. Saunders (Canada) sont présentés. Les résultats ont montrés que les vitesses d'expansion mesurées en laboratoire concordent avec celles mesurées par une vaste instrumentation sur le terrain (test in situ de l'armature, données de nivellement, relevé des contraintes et données in situ de carottages). Il est convenable de croire que la méthodologie développée donne les outils nécessaires et abordables afin de mesurer les potentiels dépendants des contraintes d'expansion résiduelle des barrages en béton. La méthodologie devrait avoir un impact sur la conception de méthodes de réhabilitation et sur les prédictions de performances futures à cause de sa fiabilité et sa polyvalence.Mots clés : barrage, béton, expansion, alcalis, granulat, réaction, ciment.[Traduit par la Rédaction] [ABSTRACT FROM AUTHOR]

Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This article discusses on the new Canadian Highway Bridge Design Code, the design provisions for fiber-reinforced structures. It provides a more rational and detailed design procedures for fiber-reinforced structures. It discusses the progress in the study relevant to this area that has been conducted by the research community worldwide and by the ISIS Canada Research Network, in particular. It also provides several comments related to the shear design of fiber-reinforced polymer and fiber-reinforced polymer-reinforced concrete beams. Moreover, the longitudinal strain parameter is also discussed.

This article focuses on the new Canadian Highway Bridge Design Code, the design provisions for fiber-reinforced structures. The Canadian Highway Bridge Design Code Technical Subcommittee 16 on Fiber Reinforced Structures has been investigating the level of conservatism in the shear equation as part of its continuous work in the calibration of the design provisions for fiber-reinforced polymer structures. Internal committee documents have been produced dealing with developments of a reliability-based health monitoring system for fiber-reinforced structures.