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Prediction of sloshing and seismic response of a floating roof in a cylindrical liquid storage tank by the response spectrum method

Tetsuya Matsui

Proceedings of the 2007 Australian Earthquake Engineering Society Conference (AEES 2007)

2007/11/23

A response spectrum method is proposed to predict the sloshing response of a floating roof in a cylindrical liquid storage tank under seismic excitation. The liquid is assumed to be inviscid, incompressible, and irrotational, while the floating roof is considered as an orthotropic elastic plate of variable thickness. The dynamic interaction between the liquid and the floating roof is taken into account exactly within the framework of linear potential theory. The analysis is based on expanding the response of the floating roof into the free-vibration modes in liquid to derive the diagonalised equations of motion for the coupled liquid-floating roof system. The modal analysis based on the response spectrum is then carried out to predict the sloshing response. Numerical results are presented to illustrate the applicability of the proposed approach.

Australian Earthquake Engineering Society (AEES)

Wollongong, NSW

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