Abstract

In this study, a torsional test for U-type steel box girders was performed to observe the effects of the kind of panel for top lateral walateral bracings on the torsional behavior of the U-type steel girder system. For the structural tests, the test specimen with a two-thirds scale of the system actually constructed in the field was used. In the torsional test to observe the efects of top lateral bracings, the most economical arrangement of the top lateral bracing was found to be the panel width to length ratio of 1:1.5 with the inclined angle of $40^{\circ}$.

Keywords

• U-type steel box girder;
• Torsional stifness;
• lateral-torsiona l buckling;
• lateral bracing

• U형 강박스 거더;
• 비틂 강성;
• 횡-비틂좌굴;
• 수평브레이싱;

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Acknowledgement

Supported by : 교량설계핵심기술연구단, 한국학술진흥재단

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