The challenge of numerical modeling of strains and stresses in concrete repairs

Saucier, François J.; Claireaux, Frédéric; Cusson, Daniel; Pigeon, M.

doi:10.1016/s0008-8846(97)00106-3

Cited by 9 publications

(2 citation statements)

References 24 publications

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“…In 2006, MTO conducted examination of cores taken from slip-formed tall wall median barrier on Highway 401-Trenton area, which showed significant deterioration within 10 years of its service life (Saucier et al, 1997). Upon examination, no durability issues were found in cores, like distresses related to freezing and thawing action or due to reactivity of aggregates.…”

Section: Improper Construction Practicesmentioning

confidence: 99%

Environmental And Age-Related Deterioration Of Concrete Median Barriers

Madhu¹

2021

Preprint

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The purpose of this research was to understand the time-dependent environmental and age-related deterioration mechanisms in the un-reinforced concrete barrier walls used in Ontario. The study concentrated mainly on the response of plain concrete barrier walls to time-dependent thermal loads and associated volume changes. The research involved temperature data collection, experimental study and numerical analysis. The temperature data was collected on an hourly basis from the temperature sensors installed in a live plain concrete barrier wall. In the experimental study, concrete samples were exposed to varying temperature and environmental conditions and tested to monitor the deviation of significant concrete parameters like compressive strength, tensile strength, modulus of elasticity etc. Based on the results from the experimental study and the temperature data collected from the sensors, a non-linear transient thermal and structural analysis was carried out on a three-dimensional model, developed using ANSYS program, for a time period of three years.

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Section: Improper Construction Practicesmentioning

confidence: 99%

Environmental And Age-Related Deterioration Of Concrete Median Barriers

Madhu¹

2021

Preprint

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“…Relaxation of concrete in tension can be beneficial in some cases because it may reduce tensile stress caused by internal and external restraints (Saucier et al 1997). As it is permitted by the CEB (1993a) code, the following equation, originally developed to predict the relaxation of concrete in compression (CEB 1993b), was used to compute relaxation in tension:…”

Section: Relaxationmentioning

confidence: 99%

Early-Age Cracking in Reconstructed Concrete Bridge Barrier Walls

2000

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. Journal, 97, 4, pp. 438-446, 2000-08-01 Early-age cracking in reconstructed concrete bridge barrier walls Cusson, D.; Repette, W. L. Abstract: An assessment of newly reconstructed reinforced concrete barrier walls on a highway bridge near Montreal indicated intense transverse cracking only a few days after concreting. Subsequent inspection of other concrete bridges in urban areas confirmed that such cracking is not uncommon. Analytical models, together with field and estimated data, were used to study the magnitude and roles of the factors that are the probable cause of this cracking. The results indicate that a combination of factors, such as temperature gradients, differential shrinkage and vibration due to traffic circulation, generated stresses that exceeded the low tensile strength of the young concrete. ACI Materials Early-Age Cracking inRésumé: Une inspection des parapets en béton armé nouvellement reconstruits d'un pont d'autoroute près de Montréal a révélé une fissuration transversale intense seulement quelques jours après le bétonnage. Une inspection subséquente d'autres ponts en béton situés dans des régions urbaines a confirmé qu'une telle fissuration n'était pas inhabituelle. Des modèles analytiques, supportés par des données in-situ et estimées, ont été utilisés afin d'étudier l'importance et le rôle des facteurs qui sont la cause probable de cette fissuration. Les résultats indiquent qu'une combinaison de facteurs, tels les gradients de température, le retrait différentiel et la vibration due à la circulation, a produit des contraintes qui ont excédées la faible résistance en tension du jeune béton. RESEARCH SIGNIFICANCEMajor factors that contributed to the early-age cracking of a reconstructed concrete bridge barrier wall were evaluated using analytical models from the CEB (1993a) and ACI 209 (1997) design codes along with measured field data and finite element modeling. A sound understanding of the early-age cracking problem is important because it may lead to ingress of moisture and salt, reinforcement corrosion, concrete spalling and, ultimately, to a reduced inservice performance of the bridge. The conclusions obtained from this study can also be applied to newly constructed barrier walls since they are often built several weeks or months after the bridge slab.

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An Experimental Study on Rapid Setting Concrete Repair Materials

Richards¹,

Xi²

Fracture of Nano and Engineering Materials and Structures

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The challenge of numerical modeling of strains and stresses in concrete repairs

Cited by 9 publications

References 24 publications

Environmental And Age-Related Deterioration Of Concrete Median Barriers

Environmental And Age-Related Deterioration Of Concrete Median Barriers

Early-Age Cracking in Reconstructed Concrete Bridge Barrier Walls

An Experimental Study on Rapid Setting Concrete Repair Materials

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