A series of experimental tests on perforated steel plate girders with inclined stiffeners is presented herein. Ten simply supported girders of practical size were tested for failure under a single concentrated load applied at the center of gravity of the section. Circular web openings of various diameters were introduced at the middle panels of the girders. Effects of different inclination angles of intermediate stiffeners on the ultimate load behavior are the main focus of the present study. Five different angles, measured from the bottom flange, were considered in the tests, viz., 90°, 75°, 60°, 45°, and 30°. Variations of strength, failure characteristic, and load-deflection response have been observed. The ultimate strength was found to increase considerably from 21% to 92% as the angle of inclined stiffeners reduced from 90° to 30°.
Full Text (PDF)