프리캐스트 바닥판용 클램프 조인트의 피로내구성
Fatigue Durability of Cramp Joint at Precast Highway Deck Slabs
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초록
The fatigue durability test using the actual size beam was performed with a cramp joint in order to apply to the highway bridge deck slab. Three types of beam were investigated for durability performance by considering stress conditions in real bridge deck slabs, 1) A beam with major shear force applied at the joint (RC Type) 2) A beam with major bending moments applied at the joint (PSC Type) 3) A beam with the pure shear applied at the joint. The experiment for beams with cramp joints showed that the cramp joint had enough durability for fatigue regardless of the overlaid length of the looped distribution bars under the current design strength level. Moreover, it was clarified that the enough durability for fatigue under the load repetition was achieved by increasing the joint span grater than 1.5D with the consideration of the deformation due to reduction in joint stiffness.
Abstract
The fatigue durability test using the actual size beam was performed with a cramp joint in order to apply to the highway bridge deck slab. Three types of beam were investigated for durability performance by considering stress conditions in real bridge deck slabs, 1) A beam with major shear force applied at the joint (RC Type) 2) A beam with major bending moments applied at the joint (PSC Type) 3) A beam with the pure shear applied at the joint. The experiment for beams with cramp joints showed that the cramp joint had enough durability for fatigue regardless of the overlaid length of the looped distribution bars under the current design strength level. Moreover, it was clarified that the enough durability for fatigue under the load repetition was achieved by increasing the joint span grater than 1.5D with the consideration of the deformation due to reduction in joint stiffness.
참고문헌 (8)
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- Kim, Y.C., "Experimental Study on the Shear Strength of Shear Key Joints of Precast Slab", Proc. of 21th JCI annual coference, in Japanese, pp.829~834 (1999)
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- Matsui, "Technology Development for Bridge Deck-Innovations on Durability and Construction", J. of Bridge and Foundation Engineering in Japanese, 31(8), pp.84~94 (1997)
- Kim, B.S., "Introduction of the first Wheel Running Machine in Korea and Research Projects on Slabs and Decks", Proc. of the 5th Japan-korea joint seminar on BMS, 2004. : Leonhardt, “鉄筋コンクリートの配筋”, 鹿島出版会 (2004)
- Kim, Y.C., "Study on Mechanical Characteristics and Fatigue Durability of Joint of Precast Decks", Doctor, pp.2001