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한국지반공학회 / v.6, no.3, 1990년, pp.41-52 
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우리나라 포화사질지반의 액상화 포텐셜 평가 (구함관계 개발을 중심으로)
( Evaluation of Liquefaction Potentional on Saturated Sand Layers in Korea (on the Development of Constitutive Relationships) ) |
| 도덕현;장병욱; 정회원, 건국대학교 농과대학 농공학과;정회원, 서울대학교 농과대학 농공학과;
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| 초 록 |
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| To investigate the liquefaction potential of sands, a series of untrained cyclic triaxial compression tests is carried out on the samples of Ottawa, Joomoonjin, Hn river and Hongseung sands. The constitutive equations of sands are derived to explain the mechanical behavior of sands under cyclic stresses, and are applicable to liquefaction analysis. The following results are obtainded in this study. 1. Sands with the lower confining pressure or relative density are to be easily liquefied, and when the amplitude of cyclic stress are large, liquefaction takes places over only a few cycles. 2. Stress ratio, porewater pressure ratio and cyclic shear strains are to be good criteria to evaluate liquefaction potential of sands. 3. Hongseung sands which contains some silty clay shows higher dynamic properties than other sands. 4. The dynamic behaviors of undisturbed Hongseung sand are about same as those of dense sands. It is noted that undisturbed Hongseung sand shows higher liquefaction potential than the samples made by pluviation under same relative density, 5. The constitutive equations of soils under cyclic loads are developed based on the theory of elasto-plasticity, logarithmic stress-strain rela'tionship, non-associated flow rule and the concept of the boundary surface. The derived equations is applicable to predict the behavior of sands under cyclic loads and liquefaction potential with a higher accuracy. 6. Based on results of the study it may be concluded that cracks of the foundations and dislocation of the structures at Hongseung earthquakes(Oct. 7, 1978, Richter scald 5.2) are not brought by the liquefaction process. |
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| 키워드 |
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한국지반공학회지:지반 / v.6, no.3, 1990년, pp.41-52
한국지반공학회
ISSN : 1229-215X
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199011920443949)
언어 : 한국어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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