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Prediction of Circular Frequency of Precast Concrete Piles with Distributed Mass by Resonance Moment–Displacement Approach

Temple Nwofor, Sule, S.

Abstract


This paper presents the results of circular natural frequency of single piles from critical buckling load by resonance moment-displacement approach. The support end conditions considered are pinned-pinned, fixed-fixed, and fixed-pinned respectively. It was assumed that resonance moment occurs when the bending moment diagram is made equal to zero at the supports while the resonance displacement is the sum total deflections resulting from the system reduction to an equivalent pinned-pinned system. A computer program coded in basic language was invoked to estimate the circular natural frequency of vibration of single piles from critical buckling load through evaluation of displacements and linear elastic stiffness of the pile. The predicted values of circular frequency (ω) of vibration for the various support conditions considered agreed favourably with those obtained from literature serving as the control points showing that resonance-buckling criterion is a useful tool for the prediction of natural circular frequency of vibration of single piles with distributed mass.

 

Keywords: Circular natural frequency, vibration, single piles, critical buckling load, resonance moment, elastic stiffness, distributed mass


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References


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DOI: https://doi.org/10.37628/jsea.v6i2.618

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