Abstract
Cracking of reinforced concrete structures reduces stiffness and a subsequent deterioration in the capacity of structural elements. This study has investigated the use of a central difference approximation to obtain curvature mode shapes for structural elements based on the measured natural frequency and modal displacements for each load step. The findings of numerical analysis, conducted using finite element software, has been compared with experimental results. This paper also presents a proposed method of damage detection for structural elements based on an estimate of stiffness degradation using nonprismatic beam element called the Modified Flexure Damage Index (MFDI). This approach estimates damage in terms of the change in the fundamental frequency of the structural elements. It has been demonstrated that the MFDI and static strength approach provide a realistic estimate of crack damage on nonprismatic reinforced concrete beams.
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Teguh, M., Saleh, F., Duffield, C., Hutchinson, G. (2006). STRENGTH DETERIORATION OF NONPRISMATIC REINFORCED CONCRETE BEAMS. In: LIU, G., TAN, V., HAN, X. (eds) Computational Methods. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-3953-9_118
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DOI: https://doi.org/10.1007/978-1-4020-3953-9_118
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-3952-2
Online ISBN: 978-1-4020-3953-9
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