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Title |
Effects of Reinforcement Details on Shear Strength of Ultra-High-Performance Concrete (UHPC) Beams with Web Openings
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Authors |
염현수(Hyun-Soo Youm) ; 홍성걸(Sung-Gul Hong) |
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DOI |
https://doi.org/10.4334/JKCI.2021.33.6.637 |
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Keywords |
초고성능 콘크리트; 섬유 직물; 유공; 전단 강도; 스트럿-타이 모델 ultra-high-performance concrete (UHPC); fabric; opening; shear strength; strut-and-tie model |
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Abstract |
This study investigated the effects of a transverse web opening on the shear strength of ultra-high-performance concrete (UHPC) beams. Test results showed that due to both the geometrical discontinuity and sectional loss, the introduction of a web opening significantly deteriorated the shear strength of the UHPC beams. It has been revealed that the reduced shear strengths, however, were effectively restored by applying various reinforcements such as diagonal shear links and textile fabrics. The test results were evaluated based on the currently available design formula for the shear strength of UHPC beams. Moreover, a strut-and-tie model was constructed that can be used to explain the ultimate strengths and failure mechanisms of the UHPC beams with web openings. However, the reinforcing mechanisms of textile fabrics are not yet clearly understood, resulting in serious overestimations. Thus, more research is required for better understanding of the complex bond behavior between fabrics and UHPC.
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