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Unleashing the resilience of Reinforced Concrete Member retrofitted with composite laminates
K.S. Navaneethan,S. Anandakumar,S. Manoj,P.C. Murugan 한양대학교 청정에너지연구소 2023 Journal of Ceramic Processing Research Vol.24 No.5
This work presents experimental results on the performance of Aramid Fiber Reinforced Polymer (AFRP) laminates used inthe flexural retrofitting of full-scale reinforced concrete beams. The effects of variables including reinforcement placement,retrofitting orientation, and AFRP lifespan are examined. The experimental findings provide compelling evidence thatstructurally damaged beams can be retrofitted with AFRP composite material to restore their strength and stiffness. In mostcases, the retrofitted beams perform as well as, if not better than, the control beams. The efficiency of the AFRP strengtheningmethod in flexure, however, was found to vary with beam length. The examinations revealed that plate debonding was theleading cause of the failures observed. In order to overcome this difficulty, it is crucial to enhance the bonding processesbetween the AFRP laminates and the concrete substrate.
Hung, T.Q.,Oh, S.J.,Tu, B.D.,Duc, N.H.,Phong, L.V.,AnandaKumar, S.,Jeong, J.-R.,Kim, C.G. IEEE 2009 IEEE transactions on magnetics Vol.45 No.6
<P>Planar Hall effect (PHE) sensors with the junction size of 50 mum times 50 mum were fabricated successfully by using spin-valve thin films Ta(5)/NiFe(x) /Cu(1.2)/NiFe(2)/IrMn(15)/Ta(5) (nm) with x = 4, 8, 10, 12, 16. The magnetic field sensitivity of the PHE sensors increases with increasing thickness of ferromagnetic (FM) free layer. The sensitivity of about 95.5 m Omega/(kA/m) can be obtained when the thickness of the FM-free layer increases up to 16 nm. The enhancement of sensitivity is explained by the shunt current from other layers. The PHE profiles are well described in terms of the Stoner-Wohlfarth energy model. The detection of magnetic micro-beads label Dynabeads<SUP>reg</SUP> M-280 is demonstrated and the results revealed that the sensor is feasible for high-resolution biosensor applications.</P>