섬유보강 고성능시멘트계 그라우트가 적용된 강관 연결부의 부착특성에 대한 실험적 연구
An Experimental Study on the Bonding Characteristic of Steel Tubular Joint Connection filled with Fiber Reinforced High Performance Cementeous Grout
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초록
본 연구에서는 모노파일지지구조의 고성능 그라우트연결부의 부착거동을 다루고 있다. 강관파일 연결부의 일체화를 위하여 섬유보강 고성능 그라우트를 개발하였으며, 재령 7일 압축강도 125MPa와 직인장강도 7.5MPa를 나타내었다. 축하중을 받는 상태에서의 그라우트의부착거동을 평가하기 위하여 강관파일에 그라우트를 충진하여 부착실험을 수행하였으며, 그 결과를 기존의 설계기준과 분석하였다. 실험변수는 섬유혼입율 (0%, 0.5% and 0.9%), 섬유의 형상비 (60 and 80)와 전단키의 높이와 간격의 비 (0.013 and 0.056)로 선정하였다. 실험결과 최대부착강도는 30.8MPa로 관찰되었으며, 섬유 혼입율보다는 전단키의 높이와 간격의 비가 부착강도에 영향을 미치는 것으로 분석되었다.
Abstract
This paper deals with the bonding characteristic of grouted joint connections of monopile support structures for offshore windpower facilities. For the integration of pile connection of wind power supporting structure, fiber reinforced high performancecementeous grout was developed and the ultimate compressive strength of it is 125MPa and the direct tensile strength is 7.5 MPaat 7 days. To assess the bond strength of grout filled in pile connection, small scaled direct bond tests under axially loaded wasperformed 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. Fromthe test results, the maximum bond strength among the all specimens was 30.8MPa and the bond strength of grouted connectionwas affected by the ratio of height to spacing of shear key than the fiber volume fraction.
참고문헌 (19)
- American Petroleum Institute, "API RP14F: Recommendation of Electrical System for Offshore Production Platforms", ~ (2008)
- Anders, S., "Von der Fakultät für Bauingenieurwesen und Geodäsie der Gottfried Wilhelm", Ph.D., pp.2007
- Anders, S., "Tailor Made Concrete Structures", pp.369~374 (2008)
- Atlantic Renewable Energy Corporation, AWS Scientific, Inc., "New Jersey Offshore Wind Energy: Feasibility Study", pp.236~ (2004), New Jersey Board of Public Utilities
- Det Norske Veritas, "Offshore Standard DNV-OS-J101, Design of Offshore Wind Turbine Structures", 213~ (2011)
- Espinosa, J. G., "Design and Calculus of the Foundation Structure of an Offshore Monopile Wind Turbine", pp.2012
- EWEA, "Wind in our Sails", EWEA Offshore 2011, pp.92~ (2011)
- Hordyk, M., "The Static and Fatigue Strength of Grouted Pile sleeve Connections", Fatigue in Offshore Structures, 2, pp.635~657 (1996)
- International Electrotechnical Commission, "International Standard Wind turbines-Part 3: Design requirements for offshore wind turbines", IEC 61400, 268~ (2009)
- Jonkman, J., "Definition of a 5-MW Reference Wind Turbine for Offshore System Development", NREL, 75~ (2009)
- 강수태, "초고성능 시멘트 복합체의 압축강도에 대한 강섬유 보강 효과", 한국구조물진단유지관리공학회 논문집, 14(5), pp.110~118 (2010), 한국구조물진단유지관리공학회
- Kurian, V. J., "Monopile Foundations for Offshore Wind Turbines", International Conference on Sustainable Building and Infrastructure (2010), ICSBI
- 이방연, "그라우팅에 적합한 점성을 갖는 변형률 경화 시멘트 복합재료", 한국구조물진단유지관리공학회 논문집, 16(1), pp.55~63 (2012), 한국구조물진단유지관리공학회
- 이진형, "폴리프로필렌섬유보강 시멘트 복합재료에 정착된 구조용 합성섬유의 부착거동에 미치는 섬유 혼입률의 효과", 한국구조물진단유지관리공학회 논문집, 15(4), pp.125~135 (2011), 한국구조물진단유지관리공학회
- Lohaus, L., "Static and Fatigue behaviour of High-Performance Concrete in “Grouted Joints” for hybrid structures", Proceedings of the 2nd Int. fib Congress (2006)
- Lotsberg, I., "Developments of Grouted Connections in Monopile Foundations", IABSE Seminar (2010)
- Nedžžad Dedićć, "Analysis of Grouted Connection in Monopile Wind Turbine Foundations Subjected to Horizontal Load Transfer", pp.2009
- NORSOK standard, "Design of Steel Structures Annex K Special Design Provisions for Jackets", NORSOK standard, 151~193 (2012)
- Schaumann, P., "Design of Large Diameter Hybrid Connections Grouted with High Performance Concrete", ISOPE 2007-Proceedings of the Seventeenth International Offshore and Polar Engineering Conference (2007)