Web Crippling in Steel Beams

Date
2014-01-15
Authors
Kobayashi, Stanley
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Go, Mateo
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Civil Engineering
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University of Hawaii at Manoa
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Flanged beams usually have web's that are relatively thin and thus weak when placed in compression. Hence, it behaves in a manner similar to that of a column in compression1, a reasonable assumption backed by experimental data. Therefore, vertical buckling of the web will occur as one of the four types shown in fig.l.a. depending on the type and condition of support of the top flange. This kind of buckling usually occurs where there are large concentrated loads such as the reactions at the beam supports or where there are columns or other beams laying on the top flange. There is also the possibility of the web failing as shown in fig.l.b. which is called web crippling. Experience and tests have shown that if a beam will not fail due to web crippling it will also be safe from vertical buckling. Thus, only web crippling is usually investigated which will account for vertical buckling.
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vi, 28 pages
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