Abstract
In the previous paper, writers have reported about the post buckling behaivior of the inelastic steel beams from mental hospitals for the planning of regional psychiatric service network. under uniform moment. Although, in the practical case, the beams under various moment gradient exist frequently. Herein writers will report about the beams under moment gradient. The purpose of this experiment is to relate the rotation capacity to the bracing space and the moment gradient. Generally beams under moment gradient have higher value of carrying capacity than Mp. And then beams under moment gradient collapse due to the local buckling on the compression flange. Following important points can be obtained from this experimental study. 1) It may be resulted that the rotation capacity of beams under moment gradient depends on the curvatur jump. 2) It should not be neglected that the rotation capacity was affected greatly by the ration of moment gradient. 3) Beams which had the ratio of moment gradient more than 0.5 should be analyzed as the beams under uniform moment becaus of its behavior. Summarizing the test results of the bracing force. 1) The bracing forth on inelastic beams was about 3〜5% for axial force in this experiment. It should be noted that the bracing force on inelastic beams was relatively higher than on elastic beams. 2) When the lateral bracing was provided only at the comprssion flange, the tension flange tend to spring up. Therefore it is better that some connecting members are jointed to the tension flange when the bracing members are desighned.
