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Home  >  Journal list  >  Journal of the Society of Materials Science, Japan  >  Vol.56  No.10 (2007)  >  pp.977-984

Journal of the Society of Materials Science, Japan
<<Previous article Vol.56  No.10 (2007)   pp.977 - 984 Next article>>

Experimental Research on the Rehabilitation Effects and Punching Shear Load-Carrying Capacity for the Evaluation Equation of RC Slabs with CFS

Toshiaki SAWANO1), Tadashi ABE1), Ming-Chien HSU1), Tetsukazu KIDA1) and Masatake NISHIBAYASHI1)
1) College of Industrial Tech., Nihon Univ.


The authors have conducted a fatigue load test due to a fixed point-loading on the reinforced concrete (RC) slabs strengthened with carbon fiber sheets (CFS) on those bottom sides; subsequently, the reinforcement effects by virtue of their residual strengths after the static load tests were evaluated and then the theoretical equation of the load carrying capacity as to the CFS-reinforced RC slabs has been proposed. As the result, the increasing strength ratios of the non-damaged CFS-reinforced RC slab and the CFS-reinforced RC slabs subjected to the stress hysteresises under the running vibration loads of ±20% and ±30% amplitudes were 1.35, 1.24 and 1.09 times in comparison with the static strength of CFS-unreinforced RC slab, respectively. Furthermore, the theoretical equation of punching shear load carrying capacity of the CFS-reinforced RC slab accumulating the CFS-effective increment to that of the ordinary RC slab has been proposed ; consequently the theoretical value agrees well with the experimental one whether the CFS-reinforced RC slab is non-damaged or not.


Keyword:
RC slab, CFS reinforcement, Running vibration fatigue load, Fixed point fatigue load test, Rehabilitation effect, Punching shear load-carrying capacity

Received: January 22, 2007
Published online: October 18, 2007
Copyright (c) 2007 by The Society of Materials Science, Japan

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