| 开孔冷弯型钢柱的试验研究 |
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| 作者姓名： | Cristopher D.Moen B.W.Schafer |
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| 摘 要： | 分析研究了开孔冷弯型钢柱的弹性屈曲和试验响应间的关系。对24个腹板开孔和不开孔的短柱和柱进行了压力试验。利用壳单元建模,对每一个构件都进行了有限元屈曲分析,从而可以获取边界条件、局部开孔、扭曲和整体弹性屈曲反应对构件的影响。腹板上的开孔,可能影响构件局部和扭转屈曲的半波长度,同时可能会导致临界弹性屈曲荷载的改变。从试验结果分析可知,尽管在某些试验中出现了延性下降等现象,但总体而言,腹板开孔对试验构件的极限强度影响很小;同时发现,在局部和扭转屈曲中,弹性屈曲也与荷载-位移曲线有关。试验中对柱子采用摩擦轴承的边界条件,其中柱端磨平且直接由钢板传力。尽管构件的延性等问题还需要更进一步研究,但这种边界条件对于评估短柱和普通柱屈曲性能是有效的,而且还可以缩短试验构件的准备时间。
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| 关 键 词： | 弹性屈曲 试验 极限强度 开孔 冷弯型钢 穿孔 |
Experiments on Cold-Formed Steel Columns with Holes |
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| Cristopher D.Moen,B.W.Schafer.Experiments on Cold-Formed Steel Columns with Holes[J].Steel Construction,2009(2):80-80. |
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| Authors: | Cristopher DMoen BWSchafer |
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| Abstract: | The objective of this paper is to observe and quantify the relationship between elastic buckling and the tested response of cold-formed steel columns with holes.Compression tests were conducted on 24 short and intermediate length cold-formed steel columns with and without slotted web holes.For each specimen,a shell finite element eigenbuckling analysis was also conducted such that the influence of the boundary conditions and the hole on local,distortional,and global elastic buckling response could also be c... |
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| Keywords: | Elastic buckling Experiments Ultimate strength Holes Cold-formed steel Perforations |
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