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Title |
An Experimental Study on the Bonding Characteristic of Steel Tubular Joint Connection filled with Fiber Reinforced High Performance Cementeous Grout
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Authors |
오홍섭(Hong-Seob Oh) ; 서교(Gyo Seo) ; 김상현(Sang-Hyeon Kim) ; 고상진(Sang-Jin Ko) ; 이현기(Hyeon-Gi Lee) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2014.18.6.021 |
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Keywords |
부착강도 ; 그라우트 연결부 ; 고성능 섬유보강 그라우트 ; 전단키 Bond strength ; Grouted joint connections ; High performance fiber reinforced grout ; Shear key |
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Abstract |
This paper deals with the bonding characteristic of grouted joint connections of monopile support structures for offshore wind power facilities. For the integration of pile connection of wind power supporting structure, fiber reinforced high performance cementeous grout was developed and the ultimate compressive strength of it is 125MPa and the direct tensile strength is 7.5 MPa at 7 days. To assess the bond strength of grout filled in pile connection, small scaled direct bond tests under axially loaded was performed and analyzed according the existing guidelines. The fiber volume fraction (0%, 0.5% and 0.9%), aspect ratio of fiber (60 and 80) and the ratio of height to spacing of shear key (0.013 and 0.056) were adopted as the experimental variables. From the test results, the maximum bond strength among the all specimens was 30.8MPa and the bond strength of grouted connection was affected by the ratio of height to spacing of shear key than the fiber volume fraction.
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