2005 Volume 2005 Issue 802 Pages 802_255-802_260
Japan is surrounded by sea, and traffic roads are located near the sea. Bridges are subjected seawater, which deteriorates the reinforced concrete due to corrosion of the steel. Recent specification in such locations requires more thick cover than the previous requirements. The present study shows the relationships between cover thickness and punching shear strength of concrete slab. Test of reinforced concrete slabs with various cover thickness was carried out in the laboratory. The punching shear strength increases with increase of the cover thickness, and the increase of punching strength is not linear to the cover thickness. Test data are compared with the provisions of JSCE, and with the proposed equation of MATSUI. A simplified equation is herein proposed, which provides the better accuracy to the data.
