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Charles William Cary, III

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Effective Lengths of Web-Tapered Columns in Rigid Metal Building Frames

Date of defense:
May 27, 1997

Document Type:
Master's Thesis

Master of Science

Civil Engineering


Current procedures for estimating effective length factors for web-tapered members rely heavily on the use of charts and graphs. This makes them difficult to implement using a computer. In addition, they are often based on unrealistic assumptions. In cases where these assumptions are not satisfied, design errors may result. This investigation proposes a modification to an effective length factor expression developed by Lui (1992). This modification allows the expression to be applied to web-tapered members with good accuracy.

A derivation of the proposed expression is presented, and the results obtained by applying the expression to a range of frames are compared to the results obtained from second-order finite element analyses. Calculations involved in using the expression are presented.

tapered, column, effective length, metal building

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etd.PDF503,884 Bytes

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Archiving fee received.

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