Experimental Study on Vortex-Induced Vibrations of Selected Bluff Sections

Abstract eng:
As a part of an ongoing research project on the development of an analytical model to predict the vortex-induced response of long-span structures, six bluff sections—the Deer Isle Bridge, the Tsurumi Bridge, the Fred Hartman Bridge, a generic rectangular and H section, and a circular model—were tested in a wind tunnel. This paper will present and discuss a number of observations made during those experiments: normalized amplitudes versus reduced wind speeds, the onset reduced wind speeds of vortex-induced vibrations, the relationship between normalized amplitudes and Scruton number, the transient and the steady-state regimes of the response histories, and differences between the vortex-induced vibrations of circular and non-circular sections. This paper is intended to complement the existing knowledge base of experimental vortex-induced vibrations on bluff, non-circular sections.

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