Interaction between drying, shrinkage, creep and cracking phenomena in concrete

Benboudjema, Farid; Meftah, Fékri; Torrenti, Jean‐Michel

doi:10.1016/j.engstruct.2004.09.012

Cited by 150 publications

(60 citation statements)

References 22 publications

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“…Several continuum models of deformations induced by RH changes have been proposed [1][2][3]. Typically, these models are based on poromechanics and relate the volumetric strain to the Laplace pressure generated by liquidvapor interfaces in the pore system (also known as capillary stress) [30,52,53].…”

Section: Continuum Modeling Of Reversible Drying Shrinkagementioning

confidence: 99%

“…Evaporable water in cement paste influences important mechanical properties such as drying shrinkage [1][2][3] and creep [4][5][6][7][8][9][10][11]. These influences are due to forces that water and dissolved ions exert from within the complex, multiscale pore system that develops during hydration, i.e., after dry cement powder (mostly calcium silicate minerals) reacts with water.…”

Section: Introductionmentioning

confidence: 99%

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Hysteresis from Multiscale Porosity: Modeling Water Sorption and Shrinkage in Cement Paste

et al. 2015

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Cement paste has a complex distribution of pores and molecular-scale spaces. This distribution controls the hysteresis of water sorption isotherms and associated bulk dimensional changes (shrinkage). We focus on two locations of evaporable water within the fine structure of pastes, each having unique properties, and we present applied physics models that capture the hysteresis by dividing drying and rewetting into two related regimes based on relative humidity (RH). We show that a continuum model, incorporating a poreblocking mechanism for desorption and equilibrium thermodynamics for adsorption, explains well the sorption hysteresis for a paste that remains above approximately 20% RH. In addition, we show with molecular models and experiments that water in spaces of ≲1 nm width evaporates below approximately 20% RH but reenters throughout the entire RH range. This water is responsible for a drying shrinkage hysteresis similar to that of clays but opposite in direction to typical mesoporous glass. Combining the models of these two regimes allows the entire drying and rewetting hysteresis to be reproduced accurately and provides parameters to predict the corresponding dimensional changes. The resulting model can improve the engineering predictions of long-term drying shrinkage accounting also for the history dependence of strain induced by hysteresis. Alternative strategies for quantitative analyses of the * Corresponding author. hmj@mit.edu PHYSICAL REVIEW APPLIED 3, 064009 (2015) 2331-7019=15=3(6)=064009 (17) 064009-1

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Section: Continuum Modeling Of Reversible Drying Shrinkagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hysteresis from Multiscale Porosity: Modeling Water Sorption and Shrinkage in Cement Paste

et al. 2015

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“…consider the material as a whole e.g. (Neville et al, 1983;Bazant, 1995;Benboudjema et al, 2001Benboudjema et al, , 2005EN1992, 2008 and do not explicitly consider the separate behaviour of the phases. This means that material parameters for these empirically derived models must be generated for each mix.…”

Section: Matrix Shrinkage During the Willam Et Al (1987) Strain Pathmentioning

confidence: 99%

The simulation of inelastic matrix strains in cementitious materials using micromechanical solutions

Jefferson

2015

Engineering Fracture Mechanics

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A new approach is described for simulating inelastic behaviour in the matrix component of a two-phase composite material. Quasi-isotropic distributed micro-cracking, accompanying volumetric matrix changes, is combined with anisotropic micro-cracking arising from directional loading. An exterior point Eshelby solution is used to obtain stress concentrations adjacent to inclusions. The accuracy of these solutions is assessed using a series of three dimensional finite element analyses. A set of stress/ strain paths are considered to illustrate the model's characteristics. The model is then applied to the problem of autogenous shrinkage in a cementitious composite, giving results that compare favourably with experimental data.

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“…The temperature design parameter has a close relationship with the geographical position, direction, natural condition, material, and so on of a bridge and is difficult to determine. The temperature parameter is a complex random variable; it plays an important role in determining the stress and deformation of the structure [12][13][14][15][16][17][18][19][20][21][22][23]. This paper analyzes the causes of temperature stress.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Temperature Stress in Control of Bridge Construction

Wang¹

2016

IJHT

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The temperature is one of the important structural design parameters in the construction control of bridges. The structural stress and deformation are significantly influenced by the temperature. As a complex random variable, the temperature parameter has a close relationship with the structural location, orientation, materials, and the natural conditions, as well as the time variable, and is very difficult to be determined in the construction. In this study, in order to compute the temperature stress from the bridge structures effectively and accurately, the factors affecting the temperature stress are analyzed. The calculation method of the temperature field of the concrete structures is investigated. According to the basic assumption, the calculation formulas of the temperature self-restrained stress and the temperature inferior stress are thoroughly analyzed, and the corresponding calculation formulas are proposed, respectively. Furthermore, based on the proposed calculation models, adopting the fine element numerical simulation method, the influence of the temperature on the bridge structure stress is analyzed and investigated. The research results provide an import theoretical and experimental basis for the construction control of bridges.

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Interaction between drying, shrinkage, creep and cracking phenomena in concrete

Cited by 150 publications

References 22 publications

Hysteresis from Multiscale Porosity: Modeling Water Sorption and Shrinkage in Cement Paste

Hysteresis from Multiscale Porosity: Modeling Water Sorption and Shrinkage in Cement Paste

The simulation of inelastic matrix strains in cementitious materials using micromechanical solutions

Analysis of Temperature Stress in Control of Bridge Construction

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