Journal of Structural Engineering, A
Online ISSN : 1881-820X
Earthquake Engineering and Seismic Design: Technical report
Estimation the natural frequency of the bulging in water tank using the micro-tremor measurement device
Shu SaitoTaisuke OnoNaoki IkedaHirokazu HiranoNaotsugu Sato
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2023 Volume 69A Pages 253-261


Various damages to water tanks have been reported due to sloshing and bulging. In particular, bulging has just added to the latest guideline, so it is necessary to understand it as soon as possible. In this paper, we calculate the bulging natural frequencies by the micro-tremor measurement device being installed on the roof panel of the water tank. Furthermore, as they are compared with the results from accelerometers installed on the wall and from finite element analysis, we confirm whether bulging natural frequencies calculated by using this device are correct. We also examine the usefulness of this device. As a result, it is found that calculated bulging natural frequencies by each method were almost identical.

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© 2023 by Japan Society of Civil Engineers
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