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Title |
Revision Proposal for KDS 14 PSC One-Way Shear Provisions
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Authors |
신형엽(Hyeongyeop Shin) ; 이득행(Deuckhang Lee) ; 강현구(Thomas H.-K. Kang) |
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DOI |
https://doi.org/10.4334/JKCI.2025.37.2.195 |
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Keywords |
프리스트레스트 콘크리트; 전단강도; 설계식; 휨-전단강도; 약산식 prestressed concrete; shear strength; design equation; flexure-shear; approximate method |
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Abstract |
The current KDS 14 20 22 prestressed concrete (PSC) one-way shear design provision provides two approaches forconcrete shear strength (?): approximate and detailed methods. Since its first introduction in the 1983 Concrete Standard Specificationsin Korea, the safety and practicality have been thoroughly validated. However, issues remain, such as relatively complex calculation,inconsistent definitions for effective depths (? and ??), and application range for the approximate method that lacks sufficientmechanical basis. This study proposes modifications regarding these issues to reduce complexity and inconsistency while retainingthe basic philosophy of the current method. The proposed revision includes: (1) simplifying the flexure-shear strength (??) equationby removing the self-weight dead load terms and integrating them with the external load terms; (2) redefining the application rangefor the approximate method based on the average compressive stress by prestressing (???, or ????); and (3) introducing a new effectivedepth (??) specifically for the approximate method. The proposed modification is expected to maintain accuracy and conservatismcomparable to the current method while improving practical applicability by reducing calculation complexity.
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