Abstract
Fatigue tests were carried out for steel-concrete sandwich beams with shear reinforcement. Under fatigue loading, the sandwich beams indicated three failure modes, namely shear compression failure due to crushing of concrete between diagonal cracks and the fatigue fracture of the steel plates either the lower flange plate or the shear reinforcing steel plates. The S-N relationship for the different failure modes is presented. The fatigue strength of the sandwich beams was also predicted by the finite element method. A simple method to predict the strains in the shear reinforcing plates under fatigue loading is presented. A fatigue design proposal for the sandwich beams is also presented.
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