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This study is to investigate the shear behavior of planar joints between existing and new slab in apartment remodelling construction for enlarging the interior space outward the existing buildings. These joints are constructed with post-installed dowel bars for shear connection. At the service load, the planar joint between existing and new slabs should behave in full composite mode, and any cracks shouldn't occur at the joints. In this paper, an experimental works were presented to evaluate the behaviors of planar joint between existing and new slabs for the serviceability and ultimate requirements. The main test variables were the number of post-installed dowel bars and the ratio of bending moment to shear force at the joints. The existing slabs were directly obtained from the apartment housing which will be demolished.
From the test, the load-displacement curves at the loading point, and the shear displacement at the joint, the failure mode, the shear strength, and the strain of reinforcing bars were analyzed. Test results showed that the connection details had the sufficient strength at the ultimate states, as well as serviceability states.

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2. 실험
3. 실험결과 및 분석
4. 결론
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UCI(KEPA) : I410-ECN-0101-2009-540-017418935