Abstract
Rotational components of ground motion including rocking and torsional components have rarely been accounted for in designing and analyzing water storage tanks. In this paper, the effects of these components on the dynamic response of water storage tanks are studied. The rotational components of ground motion acceleration have been obtained using an improved approach from the corresponding available translational components based on the transversely isotropic elastic wave propagation and classical elasticity theories. Based on this approach, it becomes possible to consider the frequency-dependent wave velocities and incident wave angle to generate the rotational components. For this purpose, the translational components of four earthquakes have been selected to generate their relative rotational components based on SV and SH wave incidence. The translational and computed rotational motions were then applied to the concrete elevated water storage tank with different water elevations considering fluid–structure interaction using the finite element method. The linear responses of these structures considering the full six components of the ground motion show that the rotational components of ground motion can affect the displacement and reaction force of the structure, depending on the frequency of structure and predominant frequencies of translational and rotational components of ground motion.
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Kalani Sarokolayi, L., Navayi Neya, B., Tavakoli, H.R. et al. Dynamic Analysis of Elevated Water Storage Tanks due to Ground Motions’ Rotational and Translational Components. Arab J Sci Eng 39, 4391–4403 (2014). https://doi.org/10.1007/s13369-014-1042-6
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DOI: https://doi.org/10.1007/s13369-014-1042-6