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Title |
Shear Strength of Prestressed Hollow Core Slabs according to Section Shape
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Authors |
강준희(Joon Hee Kang) ; 강수민(Su-Min Kang) ; 엄태성(Tae-Seong Eom) ; 김용대(Yong-Dae Kim) ; 박현석(Hyun-Suk Park) |
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DOI |
https://doi.org/10.4334/JKCI.2022.34.1.073 |
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Keywords |
중공 슬래브; 전단강도; 변형률기반 전단모델; 설계기준; 단면형상영향 hollow core slab; shear strength; strain-based shear model; design code; effect of section shape |
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Abstract |
In this study, the shear strength of prestressed hollow core slabs (HCS) was investigated. Eighteen HCS specimens with different cross-sections and effective depths were tested under four-point loading. The test results showed that the ratios of the test strength to calculated strength (i.e., predicted by ACI and KCI design codes) ranged from 1.20 to 2.64, which indicates that current design codes underestimate the shear strength of prestressed HCS members. For further investigation, the shear strength of HCS specimens was evaluated using a strain-based shear strength model, and a coefficient considering the effect of cross-sectional shape was proposed. The validity of the proposed method was verified by comparisons with the test results of this and existing studies.
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