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Open AccessArticle

Mechanics Model for Simulating RC Hinges under Reversed Cyclic Loading

1
Department of Civil Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
2
School of Civil, Environmental and Mining Engineering, The University of Adelaide, Adelaide, South Australia 5005, Australia
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Author to whom correspondence should be addressed.
Academic Editor: Geminiano Mancusi
Materials 2016, 9(4), 305; https://doi.org/10.3390/ma9040305
Received: 18 February 2016 / Revised: 13 April 2016 / Accepted: 19 April 2016 / Published: 22 April 2016
(This article belongs to the Section Structure Analysis and Characterization)
Describing the moment rotation (M/θ) behavior of reinforced concrete (RC) hinges is essential in predicting the behavior of RC structures under severe loadings, such as under cyclic earthquake motions and blast loading. The behavior of RC hinges is defined by localized slip or partial interaction (PI) behaviors in both the tension and compression region. In the tension region, slip between the reinforcement and the concrete defines crack spacing, crack opening and closing, and tension stiffening. While in the compression region, slip along concrete to concrete interfaces defines the formation and failure of concrete softening wedges. Being strain-based, commonly-applied analysis techniques, such as the moment curvature approach, cannot directly simulate these PI behaviors because they are localized and displacement based. Therefore, strain-based approaches must resort to empirical factors to define behaviors, such as tension stiffening and concrete softening hinge lengths. In this paper, a displacement-based segmental moment rotation approach, which directly simulates the partial interaction behaviors in both compression and tension, is developed for predicting the M/θ response of an RC beam hinge under cyclic loading. Significantly, in order to develop the segmental approach, a partial interaction model to predict the tension stiffening load slip relationship between the reinforcement and the concrete is developed. View Full-Text
Keywords: cyclic loading; RC beams; tension stiffening; concrete softening; hinge length cyclic loading; RC beams; tension stiffening; concrete softening; hinge length
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MDPI and ACS Style

Shukri, A.A.; Visintin, P.; Oehlers, D.J.; Jumaat, M.Z. Mechanics Model for Simulating RC Hinges under Reversed Cyclic Loading. Materials 2016, 9, 305.

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