角状構造断面の空力渦励振に関する研究

Abstract

This study is concerned with the vortex-induced oscillations of blluff bodies. A series of windtunnel tests was conducted for some basic bridge deck sections and for some simply modified modelsof suspension bridge towers in order to obtain the aerodynamically improved structural sections.The mechanism of interaction between bodies and fluid around bodies is studied by means of theflow visualization in water flume. Consequently experimental results obtained here indicate thatthe response characteristics of bridge deck sections are strongly governed by the depth/width ratioand the shape of leading edge and both of factors and furthermore vortex-induced oscillations oftower of suspension bridge are sensitively dependent on the lateral distance between two struts.