Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
권호 표지

Nonlinear Dynamic Properties of Fiber Reinforced Soils

섬유혼합토의 비선형 동적물성치

  • 박철수 (경희대학교 토목공학과) ;
  • 황선근 (한국철도기술연구원 궤도 토목연구본부) ;
  • 목영진 (경희대학교 토목공학과)
  • Published : 2003.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, deformation characteristics of fiber-mixed-soils were studied at small strain range(0.0001%～1%) using resonant column test and triaxial test, and reinforcement effect was evaluated by the measure of maximum shear moduli. The effects of the major parameters such as fiber content, aspect ratio and fiber type on reinforcement were comparatively assessed. The specimens were remolded from Jumunjin Sand randomly mixed with discrete polypropylene staple fibers. Maximum shear moduli of fiber-mixed-soils increased by up to 30% and modulus reduction was also restrained in nonlinear range. Shear moduli increased as the aspect ratio increases. The reinforcement was more effective with fibrillated fiber than with monofilament fiber. The most effective reinforcement was achieved with the specimen of 0.3 % fiber content.

본 논문은 공진주시험과 삼축압축시험을 이용하여 소변형률(0.0001%~l%) 범위에서 섬유혼합토의 변형 특성을 규명하였으며, 최대전단탄성계수를 잣대로 보강효과를 평가하였다. 또한 단섬유의 직경에 대한 길이의 비(형상비), 흙의 중량에 대한 섬유 중량의 섬유혼합비, 단섬유의 종류에 따른 보강효과를 비교 검토하였다. 시료는 주문진 표준사에 폴리프로필렌 재질의 단섬유를 무작위로 배합하여 사용하였다. 섬유혼합토의 최대전단탄성계수는 비혼합토에 비해 최대 30%까지 증가하였고, 비선형 영역에서의 전단탄성계수 감소량도 억제되었다. 형상비가 증가할수록 최대전단 탄성계수는 증가하고, 단사에 비해 망사의 보강 효과가 큰 것으로 나타났다. 섬유혼합비는 0.3 % 부근에서 보강효과가 가장 커, 최적인 것으로 확인되었다.

Keywords

References

  1. 한국지반공학회 논문집 v.11 no.1 공진주/비틂전단(RC/TS)시험을 이용한 건조 사질토의 변형특성 김동수
  2. 박사학위논문, 서울대학교 섬유혼합토의 전단파괴 예측 모델의 개발과 비배수 전단 강도 특성 분석 박영곤
  3. 석사학위논문, 경희대학교 섬유혼합토의 비선형 동적물성치 측정 박철수
  4. 한국지반공학회 논문집 v.18 no.1 풍토화의 비배수 삼축압축시험시 전체 변형률 영역의 거동에 관한 연구 안영대;오세붕;고동희;김동수
  5. 한국지반공학회 v.11 no.2 섬유혼합 보강토의 공학적 특성에 관한 실험 연구 조삼덕;김진만
  6. 한국지반학회 논문집 v.21 no.2-C 재료감쇠비 측정을 위한 주파수-위상각법, -공진주 · 비틂전단 실험 및 Impact Echo 시험에의 적용 조성호;황선근;김동수;우규석
  7. Canadian Geotachnical Journal v.26 Ninth Lauritis Bjerrum Memorial Lecture : Small is Beautiful - The stiffness of Soils at Small Strains Burland, J.B.
  8. Journal of Geotechnical Engineering v.109 no.3 Mechanics of Fiber Reinforcement in Sand Gray, D.H.;Ohashi, H.
  9. Journal of Geotechnical Engineering v.112 no.8 Behavior of Fabric versus Fiber-reinforced Snad Gery, D.H.;Al-Refeai, T.
  10. Journal of the Soil Mechanics and Foundations Division v.91 The Nature Damping in Sands Hardin, B.O.
  11. Journal of he Soil Mechanics and Foundations Division v.98 Shear Modulus and Damping in Soils : Measuremenr and Parameter Effects Hardin, B.O.;Drnevich, V.P.
  12. Journal of the Soil Mechanics and Foundations Division v.98 Shear Modulus and Damping in Soils : Design Equations and Curves Hardin, B.O.;Drnevich, V.P.
  13. Elastic Properties of Natural soils Hicher, P.Y.
  14. Ph.D. Dissertation The university of Texas at Austin Dynamic Properties of Natural soils Hwang, S.K.
  15. Proceedings, International Seminar Hokkaido Small strain measuremsnts during triaxial tests : Many problems, some solutions Lo Presti, D.C.F.;Pallara, O.;Costanzo, D.;Impavido, M.
  16. Ph.D. Dissertation, University of Michigan Static and Dynamic Response of Sands Reinforced with Discrete, Randomly Distributes Fibers Maher, M.H.
  17. Journal of Geotechnical Engineering v.116 no.11 Static response of Sands Reinforces woth Randomly Distributed Fibers Maher, M.H.;Gray, D.H.
  18. Environmental Technology : Proc. of 3rd Int. Symp. v.1 Srength and Deformation Charactteristics of Fiber Reinforces Soils Nataraj, M.S.;Adduls, H.R.;Mcmanis, K.L.
  19. Ph.D. Dissertation, The University of Texes at Austin Dynamic Properties of Sand under True Triaxial Stress state from Resonant/Column Torsional Shear Test Ni, S.H.
  20. Journal of Geotechnical Engineering v.122 no.3 Failure of Fiber-Reinfoeces Granular Soils Michaliwski, R.L.;Zhao, A.
  21. Geotechnical Testing Journal v.18 no.2 Review of Instrumentation for Measuring Small Strains During Triaxial Testing of Soil Specimens Scholey, G.K.;Frosr, J.D.;Lo Presti, D.C. F.;Iamiolkowski, m.
  22. Journal of Geotechnical Engineering v.117 no.9 Dynamic properties of Reinforces Sand Shewbridge, S.E.;Sousa, J.B.
  23. Report No. EERC 70-10, Earthquake Engineering Research Center, Iniv. of Califinia Soil Moduli and Damping Factors for Synamic Response Analysis Seed, H.B.;Idriss, I.M.
  24. Journal of Geotechnical Engineering v.117 no.1 Effect of Soil Plasticity on Cyclic Respomse Vucetic, M.;Dobry, R.
  25. ASTM, GTJODJ v.14 no.3 Resonant Column Tests on Partially Saturated Sands Qian, X.;Gray, D.H.;Woods, R.D.