Abstract
Sandwich steel plate, composed of two structural steel plates with synthetic resin in the middle, can be applied to bridge members to reduce the structural borne (noise) problem. In this study fatigue tests were carried out on five welded joints of sandwich steel plate of 10mm thickness. Six specimens of each type were fatigue tested and fracture mechanics analysis was carried out based on the observations of fatigue tests. It was found that almost the same fatigue strength was obtained for the sandwich steel and the normal steel, as long as weld quality of two types of steels was the same.
