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首页> 外文会议>Structural Stability Research Council 2005 Annual Stability Conference; 20050406-09; Montreal(CA) >CAPACITY OF BUILT-UP COLD-FORMED STEEL AXIAL COMPRESSION MEMBERS
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CAPACITY OF BUILT-UP COLD-FORMED STEEL AXIAL COMPRESSION MEMBERS

机译：冷弯型钢轴向压杆的承载能力

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摘要

This testing studied the behavior of built-up compression members made from two cold-formed steel C sections welded together. Five welding patterns were studied. Three of these patterns did not meet the criteria in the AISI Specification for built-up compression members: welding the members only at their ends, adding a stitch weld at mid-length on only one side of the member, and adding stitch welds at mid-length on both sides of the member. The other two patterns did meet the AISI Specification criteria: adding stitch welds at the third points on only one side of the member, and adding stitch welds on both sides of the members at the third points.rnIt was found that welding on only one side of the pair provides a surprising amount of restraint against relative rotation of the members. Also, welding the members together at the mid-points, which is not acceptable according to the Specification, created a specimen with a higher capacity than welding them together at third-points, which is acceptable according to the Specification. This behavior is because the welding at the mid-points restrains the members relative to one another at the point of maximum curvature in the buckled shape.
机译：该测试研究了由两个焊接在一起的冷弯C型钢制成的组合式压缩构件的性能。研究了五种焊接方式。这些模式中的三个不符合AISI规范中的组合式压缩构件的标准：仅在构件的端部焊接构件，仅在构件的中部长度处添加缝焊，并在构件的中间添加缝焊成员两边的长度。其他两种样式确实符合AISI规范标准：仅在构件的第三点上添加缝焊，在构件的第三点上两侧缝焊.rn发现仅在一侧进行焊接一对中的一个提供了令人惊讶的约束构件相对旋转的量。同样，将构件在中间点焊接在一起，这是根据规范不可接受的，这产生了比在根据规范可以接受的第三点焊接在一起时具有更高容量的试样。这种现象是因为在中点处的焊接在弯曲形状的最大曲率点处将构件相对于彼此约束。

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