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The Interfacial Stresses in Concrete Beam Strengthened with Carbon Fiber Sheets due to Temperature Rising  

Choi, Hyoung-Suk (부산대학교 사회환경시스템공학과)
Kim, Seong-Do (경성대학교 건설환경공학부)
Cheung, Jin-Whan (부산대학교 사회환경시스템공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.12, no.6, 2008 , pp. 109-118 More about this Journal
Abstract
Carbon fiber reinforced polymer(CFRP) can be bonded to the soffit of a concrete beam as a means of repairing and strengthening the beam. In such beams, materials, concrete and carbon fiber sheets, are different in coefficient of thermal expansion. Consequently, interfacial shear stresses can be increased and debonding failure may occur at the plate ends due to temperature rising. This paper presents a method of approximate closed-form solutions for the interfacial shear stresses and conducts a beam test to compare the numerical results. In case of temperature rising over $30^{\circ}C$, interfacial stress of 0.91MPa is occurred at the end of sheet. Therefore, using carbon fiber sheet for strengthening the concrete beam, it is necessary to consider the thermal effects and to evaluate the long time behavior of the concrete beam by temperature change.
Keywords
Carbon fiber sheet(CFS); Interfacial shear stress; Temperature changes;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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