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Title |
Behavior of Reinforced Concrete Slabs Connected with Hinge Joints of Remodelling Buildings
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Authors |
심규관 ; 김상식 ; 이정윤 ; 최광호 ; 임주혁 |
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Keywords |
철근콘크리트 바닥판 ; 리모델링 ; 전단연결철근 ; 접합부의 강도 ; 파괴모드 reinforced concrete slabs ; remodelling ; dowel bars ; shear strength of joints ; failure modes |
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Abstract |
Lately outmoded and functionally obsolete buildings constructed in 1960s and 1970s are often remodelled and restored. Even though there are not serious structural defects in the existing buildings, many old buildings have been reconstructed to improve residence quality or to extend residence area of the buildings. The experimental or theoretical research on plane expansion of RC apartments is quite scare. In this research, 12 specimens and 19 RC slabs connected by hinged joints were tested. The new slab was connected to the existing slab by hinge joints injecting dowel bars between two slabs. Main parameters of the slabs are types of the dowel bars (D13 and D19), spacing of the dowel bars (150mm, 300mm, and 450mm), and the locations of the steel bars in the existing slabs. The test results indicated that the shear strength of the RC test slabs having various types of dowel bars was about twice that calculated by the ACI 318-02 code. All slabs failed in concrete spatting and the dowel steel bars did not reach their yield strengths.
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