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Structural Engineering and Mechanics   Volume 11, Number 3, March 2001, pages 301-314
DOI: https://doi.org/10.12989/sem.2001.11.3.301
 
Shear-fatigue behavior of high-strength reinforced concrete beams under repeated loading
Kae-Hwan Kwak and Jong-Gun Park(Korea)

 
Abstract     [Buy Article]
    The purpose of this experimental study is to investigate the damage mechanism due to shear-fatigue
behavior of high-strength reinforced concrete beams under repeated loading. The relationship between
the number of cycles and the deflection or strain, the crack growths and modes of failure with the increase
of number of cycles, fatigue strength, and S-N curve were observed through a fatigue test. Based on the
fatigue test results, high-strength reinforced concrete beams failed at 57-66 percent of static ultimate strength
for 2 million cycles. The fatigue strength at 2 million cycles from S-N curves was shown as about 60
percent of static ultimate strength. Compared to normal-strength reinforced concrete beams, fatigue capacity
of high-strength reinforced concrete beams was similar to or lower than fatigue capacity of normal-strength
reinforced concrete beams. Fatigue capacity of normal-strength reinforced concrete beams improved by over
60 percent.
 
Key Words
    high-strength concrete; repeated loading; fatigue strength; S-N curve; number of cycles; deflection; strain; shear reinforcement.
 
Address
Kae-Hwan Kwak and Jong-Gun Park, Department of Civil and Environmental Engineering, Won Kwang University, 344-2, Shinyong-Dong, Iksan, Challabuk-Do, Korea
 

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