ACOUSTIC EMISSION GENERATING SITUATION OF STEEL PLATE-CONCRETE COMPOSITE SLABS

The steel plate and concrete composite floor system has come increasingly into use as bridge slab. However, it is impossible to inspect the concrete slab visually, since there is the steel plate that covers the bottom face. Therefore, the new inspection method is required. The final object of this research is development of practical non-destructive inspection method for health monitoring of steel plate and concrete composite slab using acoustic emission (AE) technique. AE monitoring in four kinds of bending tests were carried out and correlations between characteristics of AE wave and fatigue damage of steel plate and concrete composite beams and slab were considered. Consequently, AE results concerning concrete cracking were observed through the steel plate. The types of AE observed at crack generation, crack growth and just before specimen failure are described. For the covering abstract see ITRD E122906.