Bending Test-Based Determination of Effective Cross-Section Stiffness
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Lenka Randyskova,
Petr Janas
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| Transactions of the VSB - Technical University of Ostrava, Civil Engineering Series |
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2010, Volume 10, Issue 1, Pages 107-114
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Doi: 10.2478/v10160-010-0013-4
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For majority of materials the stress-strain relation becomes non-linear as soon as the normal stress exceeds its limit value. The non-linear behavior manifests itself through the change of the cross-section stiffness EI. In this paper the effective (secant) stiffness EI is determined as a function of the relative cross-section rotation dfi from the bending-test. To this end, the displacement method is utilized along with an iterative procedure.
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