THE RIGIDITIES OF THIN FILMS AND STEEL PLATES WHICH HAVE OPENINGS OR INNER SLITS POST-BUCKLING LOADED IN-PLANE SHEARING FORCES : Studies of steel bearing walls Part 2

Abstract

This is a report of experimental investigations of shear rigidities of thin steel plates and films with openings or inner slits. The rigidities of above members which are surrounded by the pantograph frame are obtained from "opening ratio" and "slit ratio", the former is well-known at the reinforced concrete wall is applicable. The boundary between openings and slits are verified. In case of the ratio of the width of a slit to the length of a side of above members is more than 3 to 5 percents, it should be treated as an opening. Each effects of openings and inner slits to the rigidities are estimated from "resisting area ratio" by thin films.