STUDY ON AERODYNAMIC RESISTANCE OF THE ONE BOX GIRDER OF THE CABLE-STAYED BERIDGE WITH ONE TOWER

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  • １主塔斜張橋における上下線一体箱桁断面の耐風性検討

Abstract

A long-span one-tower cable-stayed bridge is planned in the section between Port Island and Wada Cape (Kobe-Nishi sea route) on the Osaka Wangan Expressway Western Extension. This bridge is one of the world's longest one-tower cable-stayed bridges. The resistance to the vortex-induced oscillation becomes the problem due to the low frequency of the main girders of a long-span cable-stayed bridge. Therefore, wind tunnel test with spring supported sectional model of the box girder with different fairing shapes was conducted. As a result, a trapezoidal fairing shape with better aerodynamic resistance was found. In this paper, the outline of wind tunnel tests are described.

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