A chemo-thermo-damage model for the analysis of concrete dams affected by alkali-silica reaction

Comi, Claudia; Fedele, Roberto; Perego, U.

doi:10.1016/j.mechmat.2008.10.010

Cited by 112 publications

(67 citation statements)

References 28 publications

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“…Recently, in Brazil, the AAR was also identified in buildings foundations (Silva, 2007), representing considerable risks to structural safety. Economical as well as safety aspects justifies the numerous experimental (Grattan-Bellew, 1995;Ferraris et al, 1996 Comi et al, 2009;Grimal et al, 2009) concerning the characterization and modelling of the mechanical behaviour of attained structures.…”

Section: Overview Of Structural Damages Related To Aarmentioning

confidence: 99%

Modelling of the mechanical behavior of concrete affected by alkali-aggregate reaction

Ferreira

Farage

Barbosa

2013

Rem: Rev. Esc. Minas

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A Reação Álcali-Agregado (RAA) é uma das principais causas de danos químicos em estruturas de concreto, especialmente aquelas expostas à umidade, levando à fissuração, às deformações excessivas e ao aparecimento de tensões. Esse trabalho apresenta os resultados de um estudo numérico através do qual o comportamento mecânico de estruturas atingidas pela RAA é simulado sob a hipótese do acoplamento entre as tensões de confinamento e a reação. Palavras

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Section: Overview Of Structural Damages Related To Aarmentioning

confidence: 99%

Modelling of the mechanical behavior of concrete affected by alkali-aggregate reaction

Ferreira

Farage

Barbosa

2013

Rem: Rev. Esc. Minas

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“…A relatively frequent cause of damage in dam concrete is the physicochemical process called alkali-silica reaction: after a dormant period of several years from casting, a substantial decay of mechanical properties and an expansion generating self-stresses may occur slowly along a period of, say, thirty or forty years, with nonuniform distribution over the dam volume and sometimes without external visible manifestations of aging; see, for example, [Swamy 1992;Ahmed et al 2003;Comi et al 2009]. Such possible occurrences clearly require a rather large number of diagnostic analyses on a possibly damaged dam.…”

Section: Introductionmentioning

confidence: 99%

Diagnosis of concrete dams by flat-jack tests and inverse analyses based on proper orthogonal decomposition

Garbowski

Maier

Novati

2011

J. Mech. Mater. Struct.

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Dedicated to the memory of Marie-Louise Steele and to Charles Steele.Flat-jack tests have been employed for decades for the assessment of stresses and Young moduli in possibly deteriorated concrete dams and masonry structures. We propose a procedure for such tests that includes several innovations: identification of Young moduli and shear modulus in the presence of orthotropy, of pre-existing normal and shear stresses, and of tensile and compressive strength and fracture energy; use of full-field displacement measurements by digital image correlation (instead of extensometers); computer simulations performed once-and-for-all and productive of results which are subsequently processed out by proper orthogonal decomposition and its truncation; and identification of parameters in situ, soon after the tests, by portable computer with software able to perform inverse analyses by mathematical tools newly introduced into this context. The proposed procedure is validated by means of pseudoexperimental numerical exercises, by employing comparatively, as central computational tools, artificial neural networks and a trust region algorithm implying only first-order derivatives (with respect to the sought parameters) of the discrepancy function to minimize.

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“…Jako przykład ilustrujący prezentowane podejście do modelowania wpływu reakcji ASR na rzeczywiste konstrukcje betonowe wybrano przypadek zapory grawitacyjnej Fontana, analizowanej również przez innych badaczy [1]. Zapora Fontana zlokalizowana jest w Północnej Karolinie w Stanach Zjednoczonych Ameryki Północnej, w hrabstwie Graham.…”

Section: Przykład Analizy Zaporyunclassified

Modelowanie Efektów Reakcji Asr - Przypadek Zapory Typu Grawitacyjnego

Winnicki¹,

Seręga²,

Norys³

2016

ZNPRzBiS

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A chemo-thermo-damage model for the analysis of concrete dams affected by alkali-silica reaction

Cited by 112 publications

References 28 publications

Modelling of the mechanical behavior of concrete affected by alkali-aggregate reaction

Modelling of the mechanical behavior of concrete affected by alkali-aggregate reaction

Diagnosis of concrete dams by flat-jack tests and inverse analyses based on proper orthogonal decomposition

Modelowanie Efektów Reakcji Asr - Przypadek Zapory Typu Grawitacyjnego

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