Abstract
Fatigue tests were carried out for steel-concrete sandwich beams without shear reinforcement. Observed failure modes and their experimental S-N relationships for this type of beams are presented. The fatigue strength of the sandwich beams was predicted analytically by using the finite element method. The fatigue analysis was based upon reducing the compressive strength, the tensile strength, and the stiffness of the concrete with increasing the number of loading cycles (N) and increasing the stress range (Sr, ). The analytical S-N relationships are compared with the experimental ones. Finally, a design proposal for the sandwich beams under fatigue loading is presented.
