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Title |
Shear Friction of Slurry-Wall Joint Connected by Seismic Mechanical Splice for Slurry-Wall Joint (SMS)
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Authors |
김성윤(Sung Yoon Kim) ; 강관호(Gwan Ho Kang) ; 김승재(Seung Jae Kim) ; 박찬욱(Chan Wook Park) ; 김대영(Dae-Young Kim) ; 천성철(Sung-Chul Chun) |
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DOI |
https://doi.org/10.4334/JKCI.2023.35.5.523 |
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Keywords |
지하구조물 내진설계; SMS 공법; 슬러리월; 전단마찰 seismic design of sub-structures; SMS; slurry wall; shear friction |
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Abstract |
Shear friction tests were conducted on the interfaces of slurry walls connected using a Seismic Mechanical Splice for Slurry Wall Joint (SMS) to enhance the seismic design of sub-structures. The main objectives of the tests were to examine whether the concrete inside the steel tube slips and to evaluate the shear strength of the interfaces. To investigate the effects of surface roughness, two types of surfaces were designed: a smooth surface where two layers of plastic film were placed at the interface, and a roughened surface similar to the actual situation. Six specimens, three for each surface, were tested. The test results showed that all specimens had strengths higher than the predicted values based on measured material strengths, and the concrete inside the steel tube did not slip. The average ratios of test-to-predictions for the smooth and roughened surfaces were 1.57 and 1.15, respectively. The roughened surface had superior strength and stiffness in both vertical and horizontal directions. Finally, it was found that the roughened surface made the concrete interface maintain its shear capacity until the transverse reinforcement yielded, thereby ensuring the proper development of the designed shear friction behavior.
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