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자료유형
학술저널
저자정보
저널정보
한국구조물진단유지관리공학회 한국구조물진단유지관리공학회 논문집 한국구조물진단유지관리공학회 논문집 제19권 제1호
발행연도
2015.1
수록면
45 - 52 (8page)

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Fiber-reinforced polymer (FRP) has been generally accepted by civil engineers as an alternative for steel reinforcing bars (rebar)due to its advantageous specific tensile strength and non-corrosiveness. Even though some glass fiber reinforced polymer (GFRP)rebars are available on a market, GFRP is still somewhat uncompetitive over steel rebar due to their high cost and relatively lowelastic modulus, and brittle failure characteristic. If the price of component materials of GFRP rebar is not reduced, it would beanother solution to increase the performance of each material to the highest degree. The tensile strength generally decreases withincreasing diameter of FRP rebar. One of the reasons is that only fibers except for fibers in center resist the external force dueto the lack of force transfer and the deformation of only outer fibers by gripping system. Eliminating fibers in the center, whichdo not play an aimed role fully, are helpful to reduce the price and finally FRP rebar would be optimized over the price. In thisstudy, the effect of the hollow section in a cross-section of a GFRP rebar was investigated. A GFRP rebar with 19 mm diameterwas selected and an analysis was performed for the tensile test results. Parameter was the ratio of hollow section over solidcross-section. Four kinds of hollow sections were planned. A total of 27 specimens, six specimens for each hollow section andthree specimens with a solid cross-section were manufactured and tested. The change by the ratio of hollow section over solidcross-section was analyzed and an optimized cross-section design was proposed.

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