Fatigue Characteristics of Reinforced Concrete in Water


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Title: Fatigue Characteristics of Reinforced Concrete in Water

Author(s): S. Nishibayashi, S. Inque ,and K. Yamura

Publication: Special Publication

Volume: 109


Appears on pages(s): 543-562

Keywords: beams (supports); crack width and spacing; cyclic loads; deflection; failure mechanisms; fatigue (materials); fatigue tests; reinforced concrete; shear properties; underwater structures; web reinforcement; Materials Research

Date: 8/1/1988

Fatigue characteristics of concrete beams were determined under water and in air. Significant differences were observed in the fatigue strengths between the beams tested in water and those in air. The failure pattern of a reinforced concrete beam tested in water occurs as a shear failure but as flexural failure in air. At the same upper load level, the fatigue life of the beam with web reinforcement was approximately 100 times that of the beam without it. The flexural crack width of the specimen in water was lower than that exposed to air. At the same upper load level, however, the deflection and the rate of propagation of the diagonal crack were larger in air.