| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a jointing structure capable of further enhancing, at the same time, both a fatigue limit at a welded end outside a rib bend portion and a fatigue limit at an open end of a rib near a base plate or a jointing flange in a U-shaped rib structure. <P>SOLUTION: An angle of 0° to 40° between an edge surface of the rib and a shaft of the structural portion of a column is provided over a section having a distance of at least five times the thickness of a reinforcing rib plate from a peak side of an easement bend portion of the rib. In this way, a residual compressive stress introduced to the welded portion outside the rib bend portion becomes larger thereby improving the fatigue performance at the applicable portion. In addition, an angle from 0° to 20° is provided between the edge surface and the base plate or the jointing flange over a section at least three times the thickness of the reinforcing rib plate along the base plate or the jointing flange from the welded jointing end of the reinforcing rib and the base plate or the jointing flange (a far side from the structural member of the column). And the rising height of the reinforcing rib from the base plate or the jointing flange is set to less than five times the thickness of the reinforcing rib plate. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
