STRUCTURAL PROPOSAL AND CHARACTERISTICS OF LIGHTWEIGHT COMPOSITE EDGE GIRDERS FOR MULTI-SPAN CABLE STAYED BRIDGES

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  • 多径間連続斜張橋の軽量合成端2箱桁の構造提案とその特性

Abstract

<p> This study proposes an edge two-box girder using ultra high strength fiber reinforced concrete slabs for the main girder structure of a multi-span cable-stayed bridge with main span length of 650 m. The feasibility of the cross-section is confirmed by structural design. In addition, wind stability, which is an important issue in realizing the edge two box girder, is examined for various cross-sectional shapes by wind tunnel tests, and the optimum main girder shape is proposed. As a result of the structural design under live load and temperature load, the static structural characteristics were compared with those of the conventional 1 box girder, and it was confirmed that there was no significant difference between them and that the structure was feasible. In addition, the cross-sectional shape of the structure was shown to ensure wind stability against flutter through spring support tests and flutter analysis.</p>

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