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Title |
Structural Performance of Concrete Shear Walls Reinforced with Carbon Fiber-Reinforced Polymer (CFRP) Rebars
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Authors |
김선우(Sun-Woo Kim) ; 박완신(Wan-Shin Park) ; 우진석(Jin-Seok Woo) ; 김광현(Kwang-Hyun Kim) ; 이진희(Jin-Hui Lee) ; 윤현도(Hyun-Do Yun) |
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DOI |
https://doi.org/10.4334/JKCI.2025.37.3.327 |
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Keywords |
CFRP 보강 전단벽체; 전단성능; 균열진전; 설계기준 CFRP-reinforced shear wall; shear performance; crack propagation; design code |
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Abstract |
This study experimentally evaluates the shear performance of CFRP-reinforced concrete shear walls and proposes an appropriate shear strength evaluation method. Three wall specimens were tested under cyclic lateral loading: (1) a CFRP-reinforced shear wall (CCW), (2) a hybrid shear wall with vertical CFRP and horizontal steel reinforcements (CSW), and (3) a conventional steel-reinforced shear wall (SSW). The results indicate that CFRP-reinforced walls exhibited reduced crack propagation but increased crack width, attributed to CFRP’s lower bond strength and lower elastic modulus compared to steel. The CSW specimen showed similar behavior to the SSW but with reduced energy dissipation due to CFRP’s elastic properties. Meanwhile, the CCW specimen displayed pronounced pinching effects, reflecting CFRP’s linear elastic behavior and weak bond characteristics. Additionally, CFRP-reinforced walls exhibited larger tensile strains and higher compression strains than steel-reinforced walls, indicating a different failure mechanism. Comparisons with existing design codes (KDS, ACI 440.11, and CSA S806) revealed that shear strength predictions were conservative, with experimental results exceeding calculated values.
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