FRP-보강근 콘크리트 부재의 처짐계산을 위한 개선된 ACI 440 모델의 제안
Proposal of Improved ACI 440 Model for Deflection Calculation of FRP Reinforced Concrete Members
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초록
본 연구에서는 ACI 440.1R-06 설계지침에서 제안된 처짐모델의 적용범위와 그에 따른 문제점들을 파악하고 개선된 처짐모델을 제안하고자 하였다. 이를 위해 이전에 수행된 실험결과들 중에서 6개의 장방형단면과 2개의 T형단면으로 구성된 총 8개의 보를 사용하여 ACI 440모델과 라피의 모델로 부터 계산된 결과들과 비교‧분석 하였다. 또한 이를 바탕으로 변수분석을 통하여 저감된 균열모멘트의 필요성과 더불어 완전균열단면2차모멘트의 보정계수, 값을 1.2로 수정 제안하였다.
Abstract
The objective of this study is to evaluate the applied range of deflection model and the existing problems in the ACI 440.1R-06 design guide and propose the improved deflection model. For this purpose, the results of ACI 440 model and Rafi model were analysed and compared with eight test beams composed of six beams with rectangular sections and two beams with T-shaped sections. Also, though the parametric study with the results obtained from comparison, the reduced cracking moment was suggested and the modification factor, 1.2 for fully cracking moment of inertia was proposed.
참고문헌 (17)
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