Abstract
At the present time, steel that can be used in SRC structures is limited to 520 MN/m2 in strength. In order to promote the use of high strength steel in SRC structures, a three-year comprehensive research project was conducted. Major findings obtained from these tests follow ; (1) by adjusting the yield stress of the steel or compressive strength of concrete employed, the superposed strength method can still be used to estimate the strength of SRC members ; (2) SRC members with high strength steel are more ductile than those with mild steel ; (3) decrease in strength at sections where the steel net area is reduced can be compensated for by arranging additional reinforcing bars at these sections, thus making it possible to avoid brittle failure ; (4) hoops arranged in an L shape are still effective in increasing ductility ; and (5) creepdeflection can be estimated by combining the stiffnesses of the steel and RC parts. On the basis of these results, this paper also proposes design procedures and details effective to the design of SRC structures with high strength steel.
