Journal
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
Volume 197, Issue 51-52, Pages 4745-4762Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2008.06.017
Keywords
Constitutive model; Reinforced concrete; Reversed cyclic loading; Hysteretic schemes; Fracture energy; Smeared rotating crack
Funding
- Hong Kong Special Administrative Region, China [CityU 122106]
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This paper proposes a constitutive model for predicting the response of reinforced concrete. of specific interest is the realistic modeling of the hysteretic behavior of concrete under quasi-statically reversed cyclic loading. The significant cyclic features of concrete are described in the model using irrecoverable strains, crack closing and reopening, nonlinear unloading curves that represent the energy dissipation, and reloading curves with the degraded reloading stiffness that account for the damage. Partial unloading/reloading is also accounted for. The model is implemented in the context of the fracture energy based smeared rotating crack approach, and validated using measured data from experiments at both the material and structure levels. Case studies show that the model is more applicable and accurate in the nonlinear analysis of reinforced concrete structures than models with idealized hysteretic schemes. (c) 2008 Elsevier B.V. All rights reserved.
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