Abstract
The development of a non-linear visco-elastic tension-softening constitutive model for cracked and ageing concrete is outlined. It combines a micro-mechanical model for tension softening with a Kelvin chain rheological model. The ageing phenomenon is included through the concept of consolidation theory and the introduction of an ageing function—the same for all Kelvin chain units. The constitutive model is then used with the fictitious crack model for studying the creep-induced sub-critical growth of a crack in a large concrete dam. The rate of crack growth is determined in order to calculate the rupture lifetime.
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