The influence of the cyclic loading on the moment capacity and deflection of HSC beams


Abstract in English

This research presents an empirical study about the behavior of High Strength Concrete beams under the static cyclic loading. It determines the influence of cyclic loading on the moment capacity and deflection of HSC beams. A comparison of the moment capacity and deflection in both kinds of loading (monotonic and cyclic loading) were achieved. High Strength Concrete mixture was designed, based on the specifications of the American code ACI 211.4R-93. Thirty six concrete beams were prepared, nine of them were tested under monotonic loading and the rest of beams were tested under cyclic loading. The cyclic loading was performed for (5,10,15) cycles, at a range from zero to 65%, 75%, 85% of the minimum expected monotonic load. The results showed that the cyclic loading have positive effect on the flexural behavior of HSC members, whereas the moment capacity increased and the deflection decreased, especially at a range from zero to 75% of the minimum expected monotonic load, when the number of cycles was 5,10,15.

References used

Sinha, B.P., Gerstle, K.H., Tulin, L.G. Stress–strain relations for concrete under cyclic loading. ACI structural Journal, Vol.61, No.2, 1964, 195–211
Sakai, J., Kawashima, K. AN Unloading and Reloading Stress-Strain Model for Concrete Confined by tie Reinforcements. The 12th World Conference on Earthquake Engineering, 2000, 1-8
Sakai, J., Kawashima, K. Unloading and reloading stress–strain model for confined concrete. Journal of Structural Engineering ASCE, Vol.132, No.1, 2006, 22-112

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