Measurement of the Timoshenko Shear Stiffness. II: Effect of Transverse Compressibility
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Volume 11, Issue 3
Abstract
This is the second of two papers devoted to the issue of measuring the Timoshenko shear stiffness of thin-walled composite beams. In the first paper, the effect of warping on the effective Timoshenko shear stiffness, as measured through bending tests, was studied. The bending test was simulated using finite-element analysis, and the results indicated that the warping effect was minimal. On the other hand, the evidence suggests that transverse flexibility may have a significant influence on the effective Timoshenko shear stiffness, decreasing the effective shear stiffness at shorter test spans. The purpose of the present study is to further investigate this effect and to explore the use of a sandwich theory to predict the measurement error. A higher-order sandwich theory, which captures the transverse strain at concentrated loads and supports, is applied to a commercially available thin-walled composite beam. The results indicate that the sandwich model does capture the decrease in the effective shear stiffness at short spans, and the dependence of the shear stiffness on span-to-depth ratio is similar to that calculated in the first paper, using the finite-element method.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 11 • Issue 3 • June 2007
Pages: 343 - 349
Copyright
© 2007 ASCE.
History
Received: Jul 11, 2005
Accepted: May 16, 2006
Published online: Jun 1, 2007
Published in print: Jun 2007
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