Practical insights on standardised models for estimation of crack width due to imposed strains in edge-restrained reinforced concrete elements
Résumé
The paper presents a critical study on the predictive capacity of standardised methods for crack width calculations in edge-restrained reinforced concrete elements subjected to imposed strains. The aim of the presented integrative analysis was to reach global understanding of the issue of restraint-induced cracking from the point of view of SLS design and to build a sound basis for future developments of new models. The study covered relevant methods from Europe, Australia, Japan and the USA. The study was performed on three distinct case studies: (i) a demonstration example; (ii) a massive containment wall; and (iii) a heavily-reinforced tank wall segment. It was concluded that a model for crack width control in edge-restrained elements should consider the stage of cracking and be generalised for possible geometries and reinforcement. Agreement must be made on the properties of concrete applied in the design, including effective tensile strength, effective modulus of elasticity (to account for creep) and the level of strain relieve after crack formation with its effect on the crack width.
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[revised clean] Crack width in edge-restrained elements.pdf (2.16 Mo)
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