Journal of the Korean Society of Industry Convergence (한국산업융합학회 논문집)
- Volume 15 Issue 1
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- Pages.21-27
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- 2012
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- 1226-833X(pISSN)
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- 2765-5415(eISSN)
DOI QR Code
The Analysis of Soil Behaviour by Double Surface Work-hardening Constitutive Model
복합항복면 일-경화구성 모델을 이용한 지반거동해석
- Youn, Il-Ro (Dept. of Civil Engineering, Kyungpook National University) ;
- Oh, Se-Wook (Dept. of Civil Engineering, Kyungpook National University)
- Received : 2011.12.07
- Accepted : 2012.02.24
- Published : 2012.02.28
Abstract
Decomposed granite soils are in a wide range of conditions depending on the degrees of weathering. This paper is intended to examine laboratory tests such as consolidation tests and conventional triaxial compression tests conducted in order to find out the mechanical properties of Cheongju granite soil. Along with the foregoing, the results of basic physical tests conducted in order to grasp the physical properties of Cheongju granite soil were described and based on the results, methods to calculate the mechanical parameters of numerical approaches using Lade's double surface work-hardening constitutive model were examined. Finally, it is intended to explain the stress properties of Cheongju granite soil used as a geotechnical material based on its shear behavior and critical state concept using the results of isotropic consolidation tests and triaxial compression tests. As a conclusion, it can be seen that in the relationship between confining stress and maximum deviator stress, the slope is maintained at a constant value of 2.95. In the drained CTC test, maximum deviator stress generally existed in a range of axial strain of 6~8% and larger dilatancy phenomena appeared when confining stress was smaller. Finally, based on the results of the CTC tests on Cheongju granite soil, although axial strain, deviator stress and pore water pressure showed mechanical properties similar to those of overconsolidated soil, Cheongju granite soil showed behavior similar to that of normally consolidated soil in terms of volumetric strain.
Keywords
- Decomposed granite soil;
- Behaviour of stress-strain relation;
- Lade model;
- Soil parameters;
- Elasto-plastic model