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Coupled Systems Mechanics Volume 5, Number 3, September 2016 , pages 223-234 DOI: https://doi.org/10.12989/csm.2016.5.3.223 |
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Analytical assessment of elevated tank natural period considering soil effects |
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Pouyan Abbasi Maedeh, Ali Ghanbari and Wei Wu
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| Abstract | ||
| The main purpose of current study is to find the soil effects on natural period of elevated tank. The coupled analytical method is used to assess in this study. The current study presented models which are capable to consider the soil dynamic stiffness changes and fluid- structure interaction effects on natural period of elevated tanks. The basic of mentioned models is extracted from elastic beam and lumped mass theory. The finite element is used to verify the results. It is observed that, external excitation can change the natural period of elevated tanks. Considering the increase of excitation frequency, the natural period will be decreased. The concluded values of natural period in case of soft and very soft soil are more affected from excitation frequency values. The high range of excitation frequency may reduce the natural period values. In addition it is observed that the excitation frequency has no significant effect on convective period compare with impulsive period. | ||
| Key Words | ||
| ground excitation; analytical model; natural period; elevated tank; impulsive; convective | ||
| Address | ||
| Pouyan Abbasi Maedeh: International campus, Kharazmi University, No. 49 Mofatteh Ave. Tehran, I.R. Iran Ali Ghanbari:Faculty of Engineering, Kharazmi University, No. 49 Mofatteh Ave., Tehran, I.R. Iran Wei Wu: Faculty of Engineering, University of Bodenkultur, Wien, Austria | ||
