• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2005년도 춘계 학술발표회 논문집
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• pp.1377-1383
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• 2005

Mechanical properties of Municipal Solid Wastes(MSW) and their influencing parameters were studied by using a series of triaxial compression tests and resonant column tests. The shear strength of MSW can be modeled by a bilinear failure criterion. As the unit weight increasing, cohesion and internal friction were increased linearly on semi-log scale. As the proportion of waste to soil increases, maximum shear moduli tend to decrease whereas minimum damping ratios increase. Shear moduli and damping of degradable waste are higher than those of non-degradable MSW.

• 한국세라믹학회지
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• 제37권6호
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• pp.589-595
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• 2000

Densification behavior of SiC powder was investigated under cold compaction. A special form of the Cap model was proposed from experimental data of SiC powder under triaxial compression. To compare with experimental data of SiC powder under cold compaction, the proposed constitutive model was implemented into a finite element program (ABAQUS). Finite element calculations from the Cam-Clay model and the modified Drucker-Prager model were also compared with experimental data of SiC powder. The agreements between experimental data and finite element results obtained from the proposed constitutive model are reasonably good. In die pressing, finite element results obtained from the Cam-Clay model and the modified Drucker-Prager model, however, show lower average density of SiC powder compacts compared to experimental data.

• 대한기계학회논문집A
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• 제26권7호
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• pp.1324-1331
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• 2002

Densification behavior of composite powders was investigated during cold compaction. Experimental data were obtained for aluminum alloy powder mixed with zirconia powder inclusion under triaxial compression. The Cap model with constraint factors was implemented into a finite element program (ABAQUS) to simulate compaction responses of composite powders during cold compaction. Finite element results were compared with experimental data for densification behavior of composite powders under cold isostatic pressing and die compaction. The agreements between experimental data and finite element calculations from the Cap model with constraint factors were good.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 춘계 학술발표회
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• pp.792-797
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• 2009

The stress-strain characteristics of compacted bentonite are investigated using experimental triaxial compression test by Hoek-cell. Special attention given to various dry density and water absorption ratio. Based on the test results, it is shown that the stress-strain relationship of compacted bentonite is highly influenced by dry density and water absorption ratio. Also, characteristics of Bentonite is similar to the clay rather than sand. Strength of compressed Bentonite increases with higher dry density. It shows maximum strength value, if in a same condition with dry density and constrain pressure. So we determine that value as the optimistic moisture contents for the maximun strength of compressed Bentonite.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 추계 학술발표회
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• pp.827-830
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• 2008

In this study, large triaxia mpression tests of sand-gravel soils were carry out to clarify the influence of fines on shear strength characteries. Two soil specimens with/without fines that is used for construction material of dam were prepared. One was reproduced with wide range of grain size and the other was removed fines below 2mm from the one. The compaction tests proposed by our center were performed to obtain relative density of the specimens, and then each specimen was adjusted two dry density. The large triaxial compression tests were carry out under CD condition. Based on the results, the sand-gravel soils with low fines content has no effect on shear strength characteries.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 추계 학술발표회
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• pp.1353-1358
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• 2008

An elementary particle of bottom ash is similar to fine sand. so which expected from replace expensive sand. Especially, If using for improvement of soft ground, It will need of study about strength, permeability and environment of the bottom ash. In this study, the bottom ash operate of physical quality, direct shear test and triaxial compression test so analyze and compare with standard sand.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2001년도 지반환경 및 준설매립에관한 학술세미나
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• pp.72-84
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• 2001

In order to utilize mass of oyster shells for a partial substitute material for reclamation, we investigate the shear characteristics of dredged sluge mixed with oyster shells. the apparent modulus of elasticity of the this mixture are obtained from the triaxial compression tests and is utilized to characterize the apparent modulus of elastic of the oyster shells by carrying out some numerical analysis based upon the homogenization theory. We got the conclusion by a series of experiment, 1) It is verified that modulus of elasticity of dredged clay is improved by mixing with oyster shells. 2) The homogenization method for deducing apparent modulus of elasticity of oyster shells, which can consider micro-structure of mixed soil, is introduced. The elastic modulus is affected from the skeleton structure of oyster shell. The effect of 49kPa is bigger than that of 98kPa.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1997년도 Lecture Notes by Two Distinguished Scholars
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• pp.1.2-22
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• 1997

Anisotropic behaviour in soils and soft rocks may be either fabric of stress related ultra in practice is invariably a combination of both. Theoretical studies in the paper include tile iMluence oil untrained strength of assuming both the critical state and Mo21r-Coulomb concepts to hold, and the influence of elastic anisotropy oil predicted undrained effective stress paths. The predictions stemming from these theoretical concepts are examined in the light of evidence from triaxial compression and extension tests oil laboratory prepared, compacted and natural clays and from triaxial compression tests on clay shales. The experimental studies also show the Buence of sample orientation on untrained snear strength, as wen as the iIBluence of anisotropy old the effective stress angle cishearing resistance and of stress patn on measured stiffness.

• 한국지반공학회지:지반
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• 제9권2호
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• pp.27-40
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• 1993

한 개의 공시체에 대해 일정한 크기의 높은 구속압력을 가하고, 단계별로 압밀배수시간을 조정하여 압밀비배수 삼축압축시헙을 할 수 있는 방법을 이 논문에서 제안하였다. 이 방법으로 시험하면 하나의 공시체로 여러 단계의 시험을 하여 강도정수를 구할 수 있음은 물론 시험시간이 종전의 다단계시험에 비해 현저히 절약된다. 이 시험에 대한 적합성을 증명하기 위하여 불교란 시료와 재성형시료에 대해 표준압축시험과 재래의 다단계시험을 수행하고 그 결과를 비교하였다. 여기서 제안하는 시험방법으로 결정된 강도정수는 다른 시험방법으로 얻은 강도정수와 잘 일치하였으며, 이 방법이 대단히 효과적이고 실용적이라는 것을 입증하였다.

• 한국지반환경공학회 논문집
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• 제3권3호
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• pp.53-63
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• 2002

최근까지 우리나라의 암성토의 침하량을 산정하기 위해 가정된 탄성계수를 이용한 선형탄성해석 외에 다른 방법들이 시도되지 않고 있다. 특히 해상투기된 사석으로 구성된 방파제 구조물의 침하량을 정확히 산정하는 것은 거의 불가능하였다. 이 연구에서는 북제주의 채석장에서 채취한 3조의 다공질의 북제주의 화산암시료에 대해 대형삼축압축시험을 수행하였고 비선형모델을 이용하여 삼축압축시험을 수치해석으로 모사하였다. 실험과 해석에 의한 응력-변형률 거동이 비교되어 사석에 대한 하이퍼볼릭 구성모델의 적용성을 조사하였다. 비교 결과 두 응력-변형률 거동이 잘 일치하므로 하이퍼볼릭 모델은 느슨한 암성토체의 침하량을 산정하는데 적절한 것으로 판단되어진다.