Characterization of creep and crack growth interactions in the fracture behavior of concrete

Denarié, Emmanuel; Cécot, Christophe; Huet, C.

doi:10.1016/j.cemconres.2005.11.011

Cited by 41 publications

(32 citation statements)

References 2 publications

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“…The increase of the amplitude indicates the increase of the cracking rate at the initiation of the third phase for elevated stress levels (Figure 3 right). Similar behaviour was observed by Rossi et al (1994) for compressive creep and by Denarié et al (2006) for tensile creep. Rossi et al (1994) found that the basic creep strain is proportional to the number of micro-cracks created in the material.…”

Section: Discussion Of Resultssupporting

confidence: 67%

Analogy between Sustained Loading and Strain Rate Effects on the Nonlinear Creep Response of Concrete

Tasevski¹,

Ruiz²,

Muttoni³

2015

Concreep 10

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This paper investigates the uniaxial compression behaviour of concrete under different strain rates and its relation to sustained loading. The aim is to observe the strain rate effect on the pre-and post-peak behaviour of concrete. In particular, the development of nonlinear creep strains for different strain rates has been investigated and compared to the sustained load behaviour. The development of creep strains is in accordance with the progress of cracking as observed by acoustic emissions. An analogy is found between the concrete compression behaviour under various strain rates and the concrete compression behaviour under sustained loads at different stress levels.

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Section: Discussion Of Resultssupporting

confidence: 67%

Analogy between Sustained Loading and Strain Rate Effects on the Nonlinear Creep Response of Concrete

Tasevski¹,

Ruiz²,

Muttoni³

2015

Concreep 10

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“…Finally, the microscale constitutes the finest structural scale and is represented by the microstructure of hardened cement paste (HCP), which is comprised of hydration products, unhydrated residual clinker and micropores [1]. The observable or macroscale failure of the concrete caused by various environmental attacks, such as frost [2] and Alkali-Silica Reaction (ASR) [3] as well as severely mechanical loading [4], can be explained by the variation of the underlying microstructure of the concrete. Therefore, it is desirable that a correlation between the macroscopic failure and the variation of the microstructure is established.…”

Section: Concretementioning

confidence: 99%

Multiscale hydro-thermo-chemo-mechanical coupling: Application to alkali–silica reaction

Temizer¹,

Wriggers²

2014

Computational Materials Science

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a b s t r a c tAlkali-Silica Reaction (ASR) is a complex chemical process that affects concrete structures and so far various mechanisms to account for the reaction at the material level have already been proposed. The present work adopts a simple mechanism, in which the reaction takes place at the micropores of concrete, with the aim of establishing a multiscale framework to analyze the ASR induced failure in the concrete. For this purpose, 3D micro-CT scans of hardened cement paste (HCP) and aggregates with a random distribution embedded in a homogenized cement paste matrix represent, respectively, the microscale and mesoscale of concrete. The analysis of the deterioration induced by ASR with the extent of the chemical reaction is initialized at the microscale of HCP. The temperature and the relative humidity influence the chemical extent. The correlation between the effective damage due to ASR and the chemical extent is obtained through a computational homogenization approach, enabling to build the bridge between microscale damage and macroscale failure. A 3D hydro-thermo-chemo-mechanical model based on a staggered method is developed at the mesoscale of concrete, which is able to reflect the deterioration at the microscale due to ASR.

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“…Crack evolution is a key factor resulting in the delayed failure of concrete (Rossi et al, 2014). It is widely accepted that viscoelasticity and crack growth govern the long-term deformability of concrete, and thus its service behaviour and durability (Denarié et al, 2006). For low load levels, the viscoelastic behaviour of concrete is quasilinear, and crack growth is usually absent (Blechman, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, for high load levels, the cracks grow and interact with the viscoelasticity. In order to address this issue, researchers have been studying the interaction between crack propagation and the time-dependent behaviour of concrete (Denarié et al, 2006;Omar et al, 2009;Saliba et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Time-dependent brittle creep-relaxation failure in concrete

Wang

Zhang

Hao

2016

Magazine of Concrete Research

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In real-world engineering applications, concrete is usually subjected to both creep and stress relaxation. Observations are necessary to understand this coupling process. This paper presents the results of brittle creep-relaxation experiments performed on concrete. Instead of tending to an asymptotic value, the stress in all the test specimens dropped sharply with a rapid increase in the strain before failure, when the boundary displacement was kept constant. The acceleration in the tertiary stage exhibited power-law behaviour, with the exponent − α being − 0·58 ± 0·13 for the stress rate and − 0·56 ± 0·12 for the strain rate. For each specimen, the time-to-failure exhibited power-law dependence on the secondary creep (relaxation) rate, with the exponent being 0·97 ± 0·09 for strain and 0·98 ± 0·09 for stress. These results suggest that it should be possible to predict the time-to-failure of concrete by monitoring its behaviour during the steady and critical stages.

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Characterization of creep and crack growth interactions in the fracture behavior of concrete

Cited by 41 publications

References 2 publications

Analogy between Sustained Loading and Strain Rate Effects on the Nonlinear Creep Response of Concrete

Analogy between Sustained Loading and Strain Rate Effects on the Nonlinear Creep Response of Concrete

Multiscale hydro-thermo-chemo-mechanical coupling: Application to alkali–silica reaction

Time-dependent brittle creep-relaxation failure in concrete

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