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자료유형
학술저널
저자정보
저널정보
한국강구조학회 한국강구조학회지 한국강구조학회지 제5권 제3호
발행연도
1993.9
수록면
137 - 145 (9page)

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Closed U shape trough rib is widely used because it is strong in stiffness as stiffener of deck plate, uniformly in distribution of loading, and light in weight of member in steel box girder bridge. It also prevented rust because of its perfectly closed section. Welding distortion becomes little since welding process is reduced in elevated bridge and long span of the steel box girder bridge with the closed U shape trough rib. Torsional moment occurs in cross section of steel box girder badge. Resistance and shearing stress of torsion are compared and examined in steel hox girder when opened rib and closed U shape thought rib are attached at the steel deck plate respectively. The test specimen which is the closed U shape trough rib is manufactured as full scale model and carried out by static bending test and fatigue test. The stress behavior is examined on cross section of the close U shape trough rib from the static bending test and the fatigue test. The stress of closed U shape trough rib is obtained from 3 dimensional stress analysis by finite element method. The results obtained from this study are as follows: The torsion is almost burdened on the steel box girder when the opened rib and the closed U shape trough rib are attached at the box girder respectively. The torsinal resistance of closed U shape trough rib is larger than that of opened rib when opened rib and L1 shape trough rib are attached to deck plate in the steel box girder respectively. The shear lag by shearing distortion occurs not only corner of the U shape trough rib in the static bending test and the fatigue test, but also in the 3 dimensional stress analysis by the finite element method. Accordingly, it is necessary to take the counterplan fur the shear lag in case the closed U shape trough rib is used as the stiffener of hox girder.

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