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Title |
Evaluation of Structural Performance of Precast Prestressed Hollow-Core Slabs with Shear Reinforcement
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Authors |
김상윤(Sang-Yoon Kim) ; 김선훈(Seon-Hoon Kim) ; 이득행(Deuck-Hang Lee) ; 한선진(Sun-Jin Han) ; 김길희(Kil-Hee Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2023.27.1.71 |
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Keywords |
프리캐스트 콘크리트; 프리스트레스트 콘크리트; 중공슬래브; 토핑콘크리트; 전단강도; 휨강도 Precast concrete; Prestressed concrete; Hollow-core slab; Topping concrete; Shear strength; Flexural strength |
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Abstract |
This study aims to investigate the structural performance of hollow-core slab (HCS) memebers with 400 ㎜ thickness. To this end, a totalof four HCS specimens were fabricated based on the individual mold method to provide shear reinforcement, unlike the extrusion method. The keyvariables were chosen as the presence of topping concrete, core-filling concrete, and shear reinforcements. The crack patterns and load-displacementresponses of the test specimens were analyzed in detail. Test results showed that inclined shear cracking occurred all the specimens, and that the specimenwith shear reinforcement on the web of HCS unit had higher strength and ductility than the specimen without shear reinforcement. In particular, shearreinforcements placed on the web of HCS unit effectively resisted not only to vertical shear force but also to horizontal shear force between the interfaceof HCS unit and topping concrete. In addition, it was discovered that the method in which shear reinforcements are placed on the web of HCS unitis more effective in improving structural performance than core-filling method
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