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- W4240254927 abstract "This study investigates the flexural stiffness rigidity of reinforced concrete beams under dynamic excitation. The dynamic stiffness was determined from the natural frequency of vibration of reinforced concrete beams statically loaded to various levels into the cracked regime. A non-linear moment–curvature model was used in the analysis to account for the concrete nonlinearity arising from the material cracking. The finite-element method was used in the study to solve the nonlinear equations and determine the values of natural frequency and dynamic stiffness. The variation of the natural frequency with increased applied load is studied and compared with that available in the literature. The study showed that the variation of applied load with natural frequency using the non-linear analysis agrees well with that obtained experimentally for small applied loads. The variation of applied load with static deflection using the non-linear analysis coincides well with that obtained experimentally for applied loads up to the cracking load. The natural frequency and static deflection using the effective moment of inertia based on the ACI building code are lower than those obtained using the non-linear analysis for applied loads greater than the cracking load." @default.
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- W4240254927 date "2003-11-01" @default.
- W4240254927 modified "2023-09-25" @default.
- W4240254927 title "Dynamic stiffness of reinforced concrete beams" @default.
- W4240254927 doi "https://doi.org/10.1680/stbu.156.4.373.37845" @default.
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