Behavior of Hybrid NSM Reinforced and Externally Confined Reinforced Concrete Columns under Eccentric Compression – experimental and Numerical Studies

Author(s): Chellapandian M. and Suriya Prakash S.
Paper category: Proceedings
Book title: Proceedings of International Conferences (ICACMS) Advances in Construction Materials and systems Vol 2
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN: 978-2-35158-194-0
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 544-553
Total Pages: 10
Language : English

Abstract: The effectiveness of hybrid combination of near surface mounted (NSM) and externally confined (EC) FRP strengthening on the performance of RC column elements under uniaxial eccentric compression is investigated. In total, ten short RC column elements were cast. Carbon FRP is used for strengthening due to its inherent stiffness and strength properties on par with other FRP materials. The columns were strengthened using NSM CFRP laminates, EC using CFRP fabrics and their hybrid combinations. A non-linear finite element model is developed using ABAQUS and the numerical model is calibrated using the experimental results to improve the accuracy of the predictions. Experimental results revealed that hybrid strengthening of RC columns was able to show a better performance in terms of stiffness, strength, ultimate displacement ductility when compared to other FRP strengthening techniques. The numerical predictions obtained were able to better capture the initial stiffness, peak load and post-peak behavior. Thus, the proposed hybrid strengthening technique for RC columns possess the capability of restoring the loss in stiffness, strength and ductility due to additional bending moment induced by the eccentric compression loading.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00

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