구조보강용 FRP 복합체의 역학적 특성치 분석을 위한 인장시험방법 평가 연구
Appraisal Study on Tensile Test Method of Mechanical Properties of FRP Composite Used in Strengthening RC Members
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초록
Experimental study has been performed in order to construct the standard test methods and appraisal criteria by investigating the influence of specimen types(property, width, layers) and loading rate on the tensile characteristics of FRP used in strengthening RC structures. The FRP composite tested in this study are the unidirectional CFRP sheet/strip and the bidirectional GFRP sheet. Test variables consist of the various width ranging from 10mm to 25mm and number of CFRP sheets plied up to 5 layers. Test results indicated that maximum tensile strength and minimum coefficient of variation are recorded at each different width according to the fiber types and weaving directions. Also, the average tensile strengths of CFRP sheets are decreased as the number of layer of CFRP sheet are increased.
Abstract
Experimental study has been performed in order to construct the standard test methods and appraisal criteria by investigating the influence of specimen types(property, width, layers) and loading rate on the tensile characteristics of FRP used in strengthening RC structures. The FRP composite tested in this study are the unidirectional CFRP sheet/strip and the bidirectional GFRP sheet. Test variables consist of the various width ranging from 10mm to 25mm and number of CFRP sheets plied up to 5 layers. Test results indicated that maximum tensile strength and minimum coefficient of variation are recorded at each different width according to the fiber types and weaving directions. Also, the average tensile strengths of CFRP sheets are decreased as the number of layer of CFRP sheet are increased.
참고문헌 (11)
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- 유영찬, "FRP 복합체의 인장특성치 시험방법에 관한 변수 연구", 대한건축학회봄학술발표대회논문집, 25(1), pp.297~300 (2005)
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- ACI Committee 440, "ACI 440. 2R-02, Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures", ~
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