The Earthquake Engineering Online Archive

Earthquake response of axisymmetric tower structures surrounded by water

Liaw, C. Y.; Chopra, Anil K.

UCB/EERC-73/25, Earthquake Engineering Research Center, University of California, Berkeley, 1973-10, 161 pages (540/L53/1973)

A general method for linear analysis of response of axisymmetric towers, partly submerged in water, to earthquake ground motion is presented. The effects of interaction with surrounding water on the dynamic response behavior of cantilever tower structures are studied. Expressions for response, including hydrodynamic interaction, in individual modes of vibration to harmonic ground motion are presented; the accuracy of responses obtained by ignoring surface waves and compressibility of water in the hydrodynamic solution is evaluated; the effects of hydrodynamic interaction on the fundamental period of vibration are studied; and the commonly used "added mass" approach to account for effects of surrounding water is examined.

Available online: http://nisee.berkeley.edu/documents/EERC/EERC-73-25.pdf (10 MB)