Abstract
Background:For centuries, steel rebar has been the primary reinforcement in concrete despite its major drawbacks, such as its heavy weight, high electrical conductivity, and corrosiveness. Thus, in response to the need for better alternatives, innovative Hybrid Composite (HC) reinforcements have been developed.Objective:The focus of this paper is to investigate the performance of tubular HC reinforcements in concrete columns under axial compressive loading.Method:Concrete columns of different sizes were tested.Results and Conclusion:For the small columns, HC reinforced columns showed very high load capacity, which was more than 3 times the capacity of plain concrete. Moreover, significant ductility was achieved with an ultimate strain of up to 59%. For the large columns, HC reinforced columns showed similar load capacities, but much larger ultimate strains in comparison to the corresponding steel reinforced concrete columns.
Highlights
Steel reinforced concrete is a cost-effective material used for constructing the bulk of the world's buildings and infrastructure
Hybrid Composite (HC) reinforcement is made of a carbon fiber fabric in the form of a very flexible tube to be used as longitudinal reinforcement and confinement for cylindrical concrete columns
Small Columns The notation scheme that was adopted for this phase was a sequence in the following order with a dash in-between: L(H)-CC(NC,MC)-sample number where L-Light HC, H-Heavy HC; CC-Concrete Cover, MC-Mortar Cover, NC-No Cover, PC-plain concrete
Summary
Steel rebar has been the primary reinforcement in concrete despite its major drawbacks, such as its heavy weight, high electrical conductivity, and corrosiveness. In response to the need for better alternatives, innovative Hybrid Composite (HC) reinforcements have been developed
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