Bending and Torsion of Cold-Formed Channel Beams

摘要

This paper reports the results of 34 bending and torsion tests on unbraced simply211u001esupported cold-formed steel channel beams loaded eccentrically at mid-span. These 211u001eresults and those of 10 concentrically loaded beams are compared with analytical 211u001epredictions and with simple design approximations. The tests show that the beam 211u001estrengths decrease as the load eccentricity increases, and that the strength is 211u001ehigher when the load acts on the centroid side of the shear centre than when the 211u001eload acts on the side away from the shear centre. Good agreement is demonstrated 211u001ebetween the test results and analytical predictions of the strengths. An extended 211u001eseries of analytical predictions is used to develop simple interaction equations 211u001ethat can be used in the design of eccentrically loaded cold-formed channel beams.