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彈·塑性 Hyperbolic모델을 이용한 基礎地盤의 非排水 擧動解析
김찬기,정진섭 圓光大學校 1991 論文集 Vol.25 No.2
The soil engineer must analyze problems in which an initially incompressible soil is loaded, as when an embankment is constructed upon undrained saturated soil. In recent years, finite element method have been used with increasing effectiveness in analysis of displacements and stresses within soil masses. However, one of the weakest links in the analytical representations used in these methods is the models of the material behaviour. Herein is discribed a modification to the finite element methods that allows solution problems with realistic stress-strain relation for soils. A finite element program for the precision prediction of the stress distribution within foundation has been developed using the elasto-plastic Hyperbolic model. The developed program is verified by comparing the results of this study with the tested results for the Joomoonjin standard sand. The main results obtained from the numerical examples are as follows; The vertical total stress increments are insensitive to drainage and constitutive equation of materials. The horizontal total stress increments are considerably affected by the drainage and constitutive equation of materials. The maximum shear stresses are affected by the drainage only in elasto-plastic materials. The excess pore water pressures and the volumetric strains not only are considerably affected by the constitutive equation of materials, but also have almost similar distribution.
김경석,나기찬,정은경,문경래,박상기,박영봉 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1
The measurements of triceps skinfold thickness, body weight and height were done in children aged 7 to 12 years(3,142 boys and 2588 girls) in Kwangju in 1992. The author also observed degree of obesity, prevalence of obesity and average value of triceps skinfold thickness. The results were summarized as follows: 1) The mean value of triceps skinfold thickness acceding to age in male was 7 years 10.5mm, 8 years 10.5mm, 9 years 10.2mm, 10 years 12.3mm, 11 years 13.8mm, 12 years 12.3mm. In the female it was 7 years 11.9mm, 8 years 11.9mm, 9 years 11.6mm, 10 years 12.6mm, 11 years 14.1mm, 12 years 13.6mm. 2) The mean value of triceps skinfold thickness acceding to age in obese male was 7 years 16.3mm, 8 years 17.3mm, 9 years 16.0mm, 10 years 19.5mm, 11 years 23.7mm, 12 years 20.1mm. In the obese female it was 7 years 17.3mm, 8 years 17.9mm, 9 years 18.4mm, 10 years 19.5mm, 11 years 21.2mm, 12 years 20.3mm.
복합항복면 구성모델에 의한 풍화잔적토의 응력 : 변형율 해석
김찬기 대진대학교 1998 大眞論叢 Vol.6 No.-
This paper is presented of the stress-strain, volumetric strain characteristics of the Pocheon weathered residual granite soil under drained conditions. A series of consolidated drained triaxial compression tests and isotropic compression tests on specimens were performed. All material parameters of Lade's double work hardening model were determined by using the result tests. Most aspects of the soil behaviour measured in the triaxial compression tests were reproduced with good accuracy by the constitutive model. Therefore double work hardening model has been shown to be applicable to weathered residual granite soil.
김찬기 대진대학교 1997 大眞論叢 Vol.5 No.-
Decomposed granite soil is typical residual soil in Korea and it is known as a problematic soil because the strength characteristics is changed significantly when it is exposed to air and mixed or contacted with water. The aim of this study is to evaluate its characteristics of strength for particle-crushing. Decomposed granite soil crushed particles by the drop down from 2 meters height 30, 50, 100, 150, 200 times. Each of samples accomplished the consolidated undiained trixial compression test under the various comfining pressure. And the undisturbed sample accomplished the consolidated undrained, consolidated drained triaxial compression test.
金基璨 慶北大學校 人文大學 1982 인문학총 Vol.7 No.-
In Korean, there are a lot of particles, such as a subject marker -nun, -ka and an object marker-ul, -lul, that can not be found in English. But The English particle EVEN corresponds with Korean particles, [-kkaci], [-mace], or [-cocha]. The extent to which meaning is dealt with in terms of the equivalence of terms is even more clearly brought out when these two kinds of particles, Korean and English, are compared with each other. Especially by the analysis of the implicature that EVEN accompanies, we can clearly formulate the scope of the implicature that Korean particle [-kkaci], [-mace] and [-cocha] accompany. The implicature of EVEN can be analysed through its focus and scope, like the followings. For all X under consideration besides Y, the likelihood that..... X..... is greater than the likelihood that..... Y..... (X=other members of the same class as Y, Y=other focus of EVEN) Intuitively, the proposition in which EVEN occurrs implicates that it is an extreme case. According to the scope of EVEN, the extremity will be the + Pole or the - Pole in the following chart. ◁그림 삼입▷(원문을 참조하세요) As for Korean particle [-kkaci], [-mace] and [-cocha], the similar implicatures to English EVEN can be driven out with some difference between them [-kkaci] usually covers + Pole in the above chart, [-mace] -Pole and [-cocha] the scope from M to the less polar area both in +Pole and -Pole. Now it can be concluded that the Korean language is much developed in particles, so that the detailed meanings of the events can be expressed with different particles (-kkaci, -mace, and -cocha) with which English EVEN corresponds.