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논문 기본 정보

자료유형
학술저널
저자정보
Yamaguchi, Eiki (Department of Civil Engineering, Kyushu Institute of Technology) Fukushi, Fumio (Japan Steel Tower Co. Ltd.) Hirayama, Naoki (Department of Civil Engineering, Kyushu Institute of Technology) Kubo, Takemi (Japan Steel Tower Co. Ltd.) Kubo, Yoshinobu (Department of Civil Engineering, Kyushu Institute of Technology)
저널정보
테크노프레스 Structural engineering and mechanics : An international journal Structural engineering and mechanics : An international journal 제19권 제2호
발행연도
2005.1
수록면
173 - 184 (12page)

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For reducing construction cost, two-plate-girder bridges are getting popular in Japan. This type of bridge employs a PC slab, which is often cast-in-place. In such a case, concrete is not usually cast over the whole slab at one time: some portions are constructed earlier than the rest. Therefore, a construction joint is inevitably created. Due to the drying shrinkage of concrete, tension stress may occur in concrete slab. High tensile stress can be expected near the construction joint where concretes with different ages meet. Moreover, prestressing is not applied over the whole length of slab at one time. This may also serve as a source of tensile stress in the slab. Thus there is a chance that cast-in-place PC slab, especially near the construction joint, may be subjected to tensile cracking. In the present study, stress states near the construction joint in the cast-in-place PC slab of a two-plate-girder bridge are investigated numerically. The finite element method is employed and the three-dimensional analysis is conducted to see the influence of dry shrinkage and prestressing. The stress states in the PC slab thus obtained are discussed. The simplified model of a plate girder for this class of analysis is also proposed.

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