Geotechnical Engineering (한국지반공학회지:지반)

Korean Geotechnical Society (한국지반공학회)
권호 표지

Behaviour of Dry Sand under $K_o$-Loading / Unloading Conditions(II) : Hysteretic Test

$K_o$-재하/제하에 의한 건조모래의 거동(II): 다주기 시험

  • 정성교 (정회원, 동아대학교 토목공학과) ;
  • 정진교 (정회원, 동의대학교 토목공학과 교수, 정회원, 동아대학교 토목공학과)
  • Published : 1995.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

In order to investigate the characteristics of the lateral earth pressure at rest under hysteretic Ko -loading l unloading conditions. Seven types of multicyclic models have been studied experimentally using dry sand. For this study a new type of Ko -oedometer appal attn is developed, and horizontal pressure is accurately measured. The multi cyclic models consist of largely 3 cases : (i) Ko-test under the same loading/unloading condition, (ii) multi-cyclic loading /unloading Ko -test exceeding the maximum prevertical stress, and (iii) multi-cyclic loading l unloading Ko -test within the mazimium prevertical stress. As a result, the multi -cyclic model showed that single-cyclic model could be extended as well, in which the exponents for unloading condition(a and a') and the reloading coefficients(m, and m*) were mainily dependent upon type of stress model, number of cycles and relati ve density.

다주기 Ko-재하/제하 시에 수평응력의 변화특성을 관찰하기 위하여 7종류의 시험모형을 선 정하였고, Ko조건을 크게 만족할 수 있도록 특별히 고안한압밀링 형태의 Ko-시험기를 제작하여 실내 건조된 모래에 대하여 실험을 수행하였다. 시험모형은 동일한 재하/제하 응력의 반복, 최대선행응력을 초과하는 반복 재하/제하, 그리고 최대선행 연직응력 내의 반복 재하/제하 Ko시험으로 구분된다. 실험결과에서 다주기 이력모형도 역시 기존의 단주기 이력모형을 확대하여 사용할 수 있음을 보였다. 여기서, 제하시의 지수 (a 및 a*)와 재재하 시의 계수(mr 및 mr*)는 응력이력의 형태, 반복회수 및 상대밀도에 따라 주로 지배되었다.

Keywords

References

  1. Proceedings, 5th Panamerican Conference on Soil Mechanics and Foundation Engineering v.1 Stress Deformation of Sand under Ko Conditions Al-Hussaini,M.M.;Townsend,F.C.
  2. The Measurement of Soil Properties in the Triaxial Test Bishop,A.W.;Henkel,D.J.
  3. Canadian Geotechnical Journal v.9 no.3 A Simple Ko Triaxial Cell Campanella,R.G.;Vaid,Y.P.
  4. Journal of the Geotechnical Engineering Division v.108 no.GT6 Ko-OCR Relationships in Soil Mayne,P.W.;F.H.Kulhawy
  5. Proceeding, 4th International Conference on Expansive Soils Instruments for Laboratory and In-Situ Measurement of the Lateral Swelling Pressure of Expansive Clays Ofter,Z.
  6. ASTM Geotechnical Testing Journal v.4 no.4 Laboratory Instrument for Measuring the Lateral Soil Pressure and Swelling Pressure Ofter,Z.
  7. The Civil Engineering in South Africa v.24 no.10 Laboratory Ko Testing of Choesionless Soil Ofer,Z.
  8. 4th Australia New Zealand Conference on Geotechanics Laboratory Determination of Ko and Comparison with Prototype Soil Obervations Ofer,Z.
  9. Ph. D. Thesis, Standford University Finite Element Analysis of Compaction-Induced Stresses and Deformation Ou, Chang-Yu
  10. Ph. D. Thesis, Univ. of Califonia at Berkeley Soil-Structure Interaction Effects of Compaction-Induced Stress and Deformations Seed,R.B.
  11. Geotechnical Engineering Research Report No. UCB/GT/83-06 Soil-Structurt Interaction Effects of Compaction-Induced Stresses and Deformations Seed,R.D.;Duncan,J.M.
  12. Soils and Foundations v.14 no.3 Drained Deformation of Sand Under Cyclic Stresses Reversing Direction Tatsuoka,F.;Ishihara,K.
  13. Ph. D. Dissertation, univ. of Tokyo Deformation Characteristics of Snad Tatsuoka,F.
  14. Proceedings, In-Situ Measurement of Soil Properties v.2 In-Situ Measurement of Initial Stresses and Deformation Characteristics Worth,C.P.
  15. Ph. D. Thesis, University of California at Berkeley A Study of Slope Stability and Undrained Shear Strength of Clay Shales Wright,S.G.
  16. 동아대학교, 공학박사 학위논문 다주기 $K_0$-재하/제하에 의한 건조 모래의 거동 송무효
  17. 한국지반공학회지 v.10 no.4 $K_0$-재하/제하에 의한 건조모래의 거동(I) : 단주기 시험 송무효;정성교;남선우;정진교
  18. 대한토목학회 논문집 v.11 no.2 뒷채움 다짐에 의한 횡방향토압 정성교;정인준;김명모