| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve plastic deformation capacity of a member, by maintaining flexural bearing force after flange yielding, by securing dynamic stability of a flange and a web constituting a cross section in a thin plate structural member for receiving shear flexure.SOLUTION: On a groove-shaped cross-section member and an H-shaped cross-section member, a rectangular cross-section member 4 is arranged in parallel to upper and lower flanges 3 on one side surface or both side surfaces of a web 1, and one end of the rectangular cross-section member is spliced to the web, and the other end is spliced to the flange to form a triangular tubular body in a cross-sectional corner part. As indicated in the schematic diagram, a torsional strength Mrequired for keeping a dynamic balance as a structural member can be compensated for by large tensile strengths Mand Mof closed cross sections being the product of a shear stress indicated by a continuous line arrow and a distance to a central position of a stress flow, the local buckling deformation of a cross-sectional plate element is restrained, and the flexural torsional buckling of the whole member is avoided. With this structure, even a structural member constituted of a thin plate can have such excellent dynamic performance that a bearing force can be stably maintained before reaching a yield load and after yielding.</p> |
