Vibrational Characteristics and Seismic Response Analysis of Column Group in Liquid

Abstract

In this paper, a seismic response analysis method of a hexagonal column group installed in a liquid with narrow clearance between columns, which can be supposed to make a coupled vibration due to the interaction between the columns and the liquid, is shown under the condition of continuity in the flow passage and the velocity potential theory. As a result of the parametric study on the sizes of a column group, their vibrational characteristics become clear, and it is possible to estimate the seismic response characteristics of the column group in a liquid for a great number of columns. Moreover, some of calculated values are compared with experimental ones, and it is found that they coincide closely with each other.