Journal ArticleDOI
Structural performance of corrosion-damaged concrete beams
TLDR
In this paper, the effect of reinforcement corrosion on the behavior of concrete beams reinforced with plain round bars was investigated, and it was concluded that an enhancement of anchorage capacity was associated with reinforcement corrosion.Abstract:
This paper describes experimental work to investigate the effect of reinforcement corrosion on the behaviour of concrete beams reinforced with plain round bars. Particular attention is paid to the bond between reinforcement and concrete. Four groups of beam specimens were tested, each designed to investigate specific aspects of structural performance including stiffness and deflection under service loads, ultimate flexural and shear strengths and deformation capacity at failure. Beams were conditioned to induce loss of cross-sectional reinforcement of up to 10% owing to corrosion, equivalent to 0·3 mm corrosion penetration, and longitudinal crack widths of 1·0 mm. Flexural stiffness of specimens detailed for a flexural mode of failure was not impaired by corrosion. Strength of beams with corroded bars equalled or exceeded that of companion non-corroded specimens in all cases, despite loss of bar section. It is concluded that an enhancement of anchorage capacity, believed to be associated principally with ...read more
Citations
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Journal ArticleDOI
Chloride-induced corrosion of steel in cracked concrete – Part I: Experimental studies under accelerated and natural marine environments
TL;DR: Parallel corrosion experiments were carried out for 2¼ years by exposing one half of 210 beam specimens (120.5 × 130 × 375 mm long) to accelerated laboratory corrosion (cyclic wetting and drying) while the other half underwent natural corrosion in a marine tidal zone.
Journal ArticleDOI
Durability deterioration of concrete under marine environment from material to structure: A critical review
TL;DR: In this article, the effects of marine environment on the deterioration mechanism, performance, and durability of concrete materials and structures are systematically reviewed, and prospectives are proposed for practical applications on concrete under marine environment.
Journal ArticleDOI
Effects of stirrup corrosion on bond–slip performance of reinforcing steel in concrete: An experimental study
TL;DR: In this paper, the effects of stirrup corrosion on bond performance between rebar and concrete were investigated and it was found that stirrups are relatively vulnerable to marine environment corrosion, as their protective layer is thinner than that of rebar.
Journal ArticleDOI
Engineering bond model for corroded reinforcement
TL;DR: An existing model for assessing the anchorage capacity of corroded reinforcement is developed based on the local bond stress-slip relationships from fib Model Code 2010 and has been modified to account for corrosion.
Journal ArticleDOI
Stiffness Degradation and Time to Cracking of Cover Concrete in Reinforced Concrete Structures Subject to Corrosion
TL;DR: In this article, the authors proposed a stiffness degradation factor to model the stiffness degradation of the cover concrete subject to cracking, which is computed in terms of the cracking strain corresponding to the maximum opening of the concrete cracks based on an energy principle applied to a fractured reinforced concrete structure.
References
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Journal ArticleDOI
Mechanical Properties of Corrosion-Damaged Reinforcement
TL;DR: In this paper, the effect of corrosion attack on mechanical properties of reinforcement is investigated through physical tests on bars with simulated and real corrosion damage and through a simple numerical model, which is related principally to the variability of attack along the length of the bar.
Journal ArticleDOI
Flexural Strength of Concrete Beams with Corroding Reinforcement
TL;DR: In this article, the results of an experimental study on 111 under-reinforced concrete beams were presented to determine their residual flexural capacity after undergoing different degrees of reinforcement corrosion. But the results showed marked reductions in flexural strength due to reinforcement corrosion, which was caused primarily by the breakdown of bond at the steel/concrete interface.
Journal ArticleDOI
Mechanical behaviour of corroded reinforced concrete beams—Part 1: Experimental study of corroded beams
TL;DR: In this paper, the effect of steel corrosion on the structural behavior of reinforced concrete structural elements in their service and ultimate states has been investigated on fourteen-year-old reinforced concrete beams, on two control elements and two corroded beams.
Journal ArticleDOI
Behaviour of concrete beams with exposed reinforcement
J Cairns,Zhifang Zhao +1 more
TL;DR: In this article, a detailed description of the changes in structural behaviour that arise when reinforcement is exposed is provided, based on principles of equilibrium of forces and compatibility of deformations Results of 19 physical tests and of numerical modelling of beams with bonded and with exposed reinforcement are reported.
Journal ArticleDOI
Towards a harmonised European bond test
John Cairns,Giovanni Plizzari +1 more
TL;DR: In this paper, the authors outline the principals that should underpin a bond test specification derived from considerations of the manner in which bond influences structural performance, and develop proposals for a system of testing in which several measures can be used to classify each aspect of structural performance.