貯水池의 堆砂土에 關하여

李裕根 진주산업대학교 1983 論文集 Vol.21 No.-

The purpose of this paper is to investigated with regard to the character of Sedimented soil and the measurement of sediment in the reservoirs, and the results are as follows. 1) The measurement of sediment in the reservoir came out 186.7㎥/㎢ as yearly mean. 2) The reduction ratio of storage capacity came out 0.04% 3) CEC, Ca, Mg, SiO_2 content of sedimented soil is found out more big than the mean value in the Korea paddy field.

鋼纖維補强콘크리트의 特性에 對한 基礎的 硏究

李裕根 진주산업대학교 1978 論文集 Vol.16 No.-

This study was attempted to investigate the mechanical propertice of concrete and crack control effects of reinforced concrete with steel fiber. The experimental program includes tests on the properties of fresh concrete containing fivers, compressive strength, tensile strength, Shinkage and deformation of steel fiber reinforced concrete, The results are as follows. 1. The comparative results of steel fivers added into concrete specimen with plain concrete showed the definite increase in the compressive strengte. 2. Otherwise the tensile strength were increased definitely in the steel fiber added to the concrete. 3. The workabilities of steel fiber reinforced concrete was decreased definitely with the addition of steel-fiber. 4. With the addition of steel fibers to the concrete, the toughness of fiber reinforced concrete was increased.

정상인과 요추간판탈출증환자에서 요추간판간격의 비교연구

이유근 대한영상의학회 1976 대한영상의학회지 Vol.12 No.2

The herniated lumbar disc is one of the common causes to produce low-back pain. The plain films of lateral lumbar spine of one hundred cases of the herniated lumbar disc and another one hundred cases of normal patients proved on myelograms were studied. The heights of the lumbar vertebral bodies, and the lumbar lordosis were measured. The results are as follows: 1. The mean height of the 3rd lumbar spinal body is largest among the lumbar spines and the upper 2 lumbar spines show an anterior wedging and the lower 2 spines show a posterior wedging. 2. The heights of the lumbar disc spaces have increasing tendency down to the L4 and L5 interspace. The height of L5 and S1 interspace is most variable and the mean is almost equal with that of L3 and L4 interspace in male and of L4 and L5 interspace in female, 3. In cases of herniated disc between L4 and L5, about 45% of the patients has narrowed disc space smaller than that of L3 and L4. 4. In the patients with herniated lumbar disc the mean values of lumbar disc spaces are evidently decreased upto 3mm. than those in the normal group. 5. In normal group the overall mean depth of the lumbar lordosis is 8.4mm. in male and 8.33mm. in female, and they show significant decrease in the disc group. 6. The overall mean degree of the lumar lordosis is 4.59% in normal group and it is slightly decreased in disc group as 3.66%. 7. In case of the narrowed disc space 2mm. more than the normal value, the coexistence of narrowing of disc space more than 2mm. from the value of the just above space is evident sign of heriated lumbar disc.

河川 年 流出量의 模擬發生을 위한 水門學的 模擬技法에 關한 硏究(II) : 南江을 中心으로

李裕根,李炯來 진주산업대학교 1984 論文集 Vol.22 No.-

The thesis of this analytical study includes 1) the generation of annual discharge about single hydrological variable at single site 2) comparison with the historical records and the generation. One of the purpose of this study is to develop analytical computer models for such a synthesis of streamflow sequence in perennical stream. The conclusions of this study will be used for the future plan for water resources development. The results obtained are as follows. 1. The generated annual discharges by the 1st and 2nd sequence has found out persistent­absent by the correlogram. 2. The generated annual discharges come out as the random sequence. 3. The mean of Generated annual discharges have more value than that of historical records.

도심터널 굴착으로 인한 주변지반의 변위에 관한 연구

이유근,정대석 진주산업대학교 산업과학기술연구소 1996 산업과학기술연구소보 Vol.- No.3

이상과 같이 쌍터널(twin tunnel)에 대한 수치 해석 결과 주변지반의 안정성 확보를 위해 다음과 같은 결론을 얻게 되었다. 1) 횡방향 지표침하는 가우스정규분포곡선으로, 종방향 지표침하는 중첩(Superposition)시킨 누적정규분포곡선들로서 해석이 가능하다. 2) 1차 및 2차 터널의 굴진간격차가 좁은 국내NATM시공의 경우, 종방향 지표침하를 해석할 수 있는 침하곡선식을 제안하였다. y/Z_0 ≥0 경우, U+(1-A)exp(B'y/Z_0) y/Z_0≥0 경우, U=1-A exp(-B(y/Z_0)) 단, A = 0.65, B'= B (일반 국내 NATM 시공 경우) 3) d<0.8 Z_0 경우에는 지질조건에 관계없이 횡방향 침하곡선형태는 Unimodal로, d≒Z_0 경우에는 점성토 및 사질토 모든 지반에서 Bimodal로 나타난다. 4) 지중침하는 양터널 중간부가 작게 나타나고 터널 중심부가 최대로 나타나는 W형 (Bimodal)의 침하곡선형태를 갖는다. 5) 매개변수중, 터널직경에 대한 pillar폭의 비, S'/D이 지반침하간섭의 가장 큰 영향인자이며, S'/D 의 감소시 간섭체적이 증가하나 S'/D≤0.5인 경우는 압축상태의 체적 변형을 갖는 pillar의 폭 감소로 오히려 간섭체적이 감소한다. 6) 평행하지 않는 쌍터널의 경우, 1,2차 터널의 깊이비 Z_02/Z_01≥1 일때 침하간섭체적이 증가하고 Z_02/Z_01<1 일때 감소하므로 실제 현장에서는 터널깊이가 작은 터널을 1차시공하는 것이 유리하며 1,2차터널의 단면적 비 A_2/A_1>1 일때 간섭체적이 감소하고 A_2/A_l<1 일때 증가하므로 단면적이 적은 터널을 1차 굴진하는 것이 유리하다. A tuunel in an urban area should be to predict the magnitude and distribution of ground movements which are important to investigate the potential damage to the existing structure around tunnel. The present study examines available theories and emprical equations, and tries to investigate quantativily ground movements around tunnel with tunnel progressing. Approaches to the problem of ground movements associated with twin tunnel was and elasto- platic finite element method.

纖維補强콘크리트의 特性에 관하여

李裕根 진주산업대학교 1980 論文集 Vol.18 No.-

The concept of using steel fibers as random reinforcement in concrete is of relatively recent origin. In this paper, the effect of steel fibers on the static compressive strengths, splitting tensile strengths, bending strengths, compressive toughness and impulse tests of concrete was studied. The results of this study are conduded as follows; 1) The workabilities of fiber reinforced concrete was decreased definitely with the addition of steel-­fiber. 2) Outherwise the tensile strengh and bending strength were in creased difinitely in the steel fiber added to the concrete. 3) The study was also concluded good condition of concrete toughness in order to prevent craek development by the addition of steel fiber in the concrete.

剪斷變形을 고려한 直交 異方性 積層板의 有限要素解析

李裕根,李元洪 진주산업대학교 농업기술연구소 1994 農業技術硏究所報 Vol.7 No.-

Laminated composite plates exhibit properties considerably different form those of the single layer palte. The great difference in elastic properties between fiber and matrix materials leads to a high ratio of in-plane Young's modulus to transverse shear modulus for laminated composite plates. Thus, to obtain the more exact behavior of laminated composite plates, effects of shear strain should be considered in the analysis of them. The present study deals with the first-order shear deformation theory for orthotropic laminated composite plates by Finite Element Method.

三軸壓縮試驗에 依한 補强土의 剪斷特性

李裕根 진주산업대학교 1977 論文集 Vol.15 No.-

Reinforced Earth developed by H. Vidal since the end part of 1960's. Due to the complicated mechanical properties of Reinforced Earth there have many problems in appling directly the result of model tast on the desigen of earth structure. In this paper the stress-strain and shear behaviour of Reinforced Earth is analized through the triaxial compression test under the same condition as the underground. The specimens of Reinforced Earth made of the pure sand imbedded horizontal in a given space with aluminium foil. According to the result of tests. Reinforced Earth can be considered as the earth with cohesion and friction. The assuption of this result will be applied on the design of Reinforced Earth struocture through the theoritical analizing method as the conventional earth structure.

연속소둔공정의 작업단위 편성을 위한 발견적 기법

이유근,이승만,전치혁,최인준,장수영 대한산업공학회 1994 대한산업공학회 춘계학술대회논문집 Vol.1994 No.4

대동맥축착, 동맥관계존, 좌상공정맥을 합병한 다발성 혈관기형 일례

이유근 대한영상의학회 1974 대한영상의학회지 Vol.10 No.2

This is a case report of multiple congenital vascular anomalies in which coarctation of the aorta combine with the patent ductus arteriosus and the persistent left superior vena cava. the patient was a 15 year old girl and congenital heart disease was suspected during infancy. However, she heard the disease incurable, so she had been well with herb medicine until admission in our hospital. By physical examination and roentgenological studied including aortography, the diagnosis of the patent ductus arteriosus was detected and the coarctation of the aorta was suspected. The persistent left superior vena cava was found during surgery and it was proved roentgenologically by venography.