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Investigation on Energy Absorption Capacity of Reinforced Concrete Beams by the Near-Surface Mounted Technique Using Ductile Materials

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The energy absorption capacity of reinforced concrete (RC) elements is one of the crucial structural properties that define their seismic resistance. The use of steel bars for the strengthening or retrofitting of RC beams in view of their superior mechanical behaviour, is predominantly motivated by their energy absorption capacity. This paper presents the strengthening of reinforced concrete by employing the near-surface mounted (NSM) technique using steel bars subjected to flexural loads. Rectangular strengthened RC beams were experimentally and analytically studied. Four-point bending tests were performed up to failure, in which the load, mid-span deflection, strains and failure mode were recorded. The RC beams were strengthened with different ratios of the NSM reinforcement. The test results revealed that the energy absorption capacity with the NSM ductile materials increase by up to 80% compared with the control beam. In addition, the steel bars showed a significant increase of the ultimate load by up to 70%. The results predicted on the basis of analytical models show good agreement with the experimental results.
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Document Type: Research Article

Publication date: August 1, 2016

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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