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서흥석(H.S. Seo),양영명(Y.M. Yang),홍성호(S.H. Hong),김형식(H.S. Kim),김영균(Y.K. Kim) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.11
The design of internal pipe for LNG storage tanks is an important part in the design of mechanical part for LNG storage tanks and is very complicated. Because we must consider so many loading conditions related to design concepts when we design the internal pipes for LNG storage tank. And bottom reinforcement, wall reinforcement and support pipes which are joined and reacted together must be designed altogether. These complicated procedures are raised problems which are spending many man-hours and making mistake easily. So, KOGAS had developed EASY-pipe program to solve these problems. This paper is focus on the introduction of EASY-pipe program and the design procedures.
[A-12] 27만 kl급 초대용량 LNG저장탱크 콘크리트 외조의 최적단면 결정을 위한 변수영향검토
이강원(K.W.Lee),서흥석(H.S.Seo),김준휘(J.H.Kim),이경민(K.M.Lee),김미승(M.S.Kim) 한국가스학회 2010 한국가스학회 학술대회논문집 Vol.2010 No.10
The purpose of this study is to seek for optimum outer tank section of 270,000kl capacity large LNG storage tank. In this study, diameter of inner tank is chosen for decisive factor. Because inner tank diameter affects dimension of the section mostly. Increased and decreased rate of stress, amount of major material and approximate construction cost are analyzed for each inner tank diameter 90m, 92m, 94m regarding stability and economic feasibility. From analyzed results, it was found that the smaller in inner tank diameter, the less in stress in case of applying dead load, LNG pressure and prestress loads at the same time under the same capacity. Also the smaller inner tank diameter decrease amount of major material and total construction cost. Accordingly, optimum inner tank diameter is conclude with 90m. Since, increased loads by increased diameter and height can counterbalance with pre-stress load, that secures stability and is also economical considering land use efficiency and total construction cost.
Condensation Phenomenon on the Concrete Wall of LNG Storage Tank
B.T.Oh(오병택),Y.K.Kim(김영균),H.S.Seo(서흥석),H.C.Han(한해철),Y.K.Yoon(윤용근) 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.11
The transient heat transfer analyses have been performed to analyze the measuring data from site and the cause of condensation for the LNG storage tank of LNG receiving terminal. The observed fact is that there was temperature degradation phenomenon on the outside surface of concrete wall partially. The scenarios for this phenomenon were set up. And the temperature-drop FE model was derived in order to carry out heat transfer analyses and deduce the cause of condensation phenomenon. As a result, the procedure of generating dew and the cause of condensation has been investigated using the temperature-drop FE model. And the internal materials like vapor barrier and reinforcement in concrete wall were satisfied with the allowable design temperature. The condensation phenomenon seems to occur when the temperature of the temperature-drop area meets the ambient dew-point condition by temperature and humidity.
全錫徹,成圭寶,朴永根,朴忠基,徐興錫,咸蒼谷 한양대학교 의과대학 1984 한양의대 학술지 Vol.4 No.1
Radiologic manifestations were analysed in chest injured patients who were admitted and treated at the Department of Thoracic and Cardiovascular Surgery during the period of 5 years from Aug. 1978 to Aug. 1983. The patients were 253 in number and the results were as follows; 1. Nonpenetrating trauma is more frequent (83.8%) than penetrating trauma. 2. The most frequent oause of trauma is traffic accident(60.1%). 3. The frequent radiologic findings in nonpenetrating chest injury were rib fracture, hemothorax and subcutanneous emphysema, and in poetrating chest injury, subcutaneous emphysema, hemothorax and pneumothorx in order of frequency. 4. The most frequently fractured rib was 6th rib, and frequently fractured ribs were from 3rd to 8th ribs(more than 40% of patients). 5. In all cases of hemopneumothorax were associated with rib fracture in nonpenetrating injury. 6. Delayed apperaance of hemothorax, pneumothorax and hemopeumothorax was seen in 9.0% of cases(14 cases).
The Influence of Pore-pressure and Tree Load on the Development of Landslides
Kim, S. K.,Jang, Y. S.,Shin, S. M.,Seo, H. S.,Ryu, C. H.,Han, S. G. 東國大學校 1994 東國論叢 Vol.33 No.-
우리나라 산사태의 발생 메커니즘을 알아보기 위해 1991년 7월에 많은 산사태가 발생한 용인지역을 현장 답사하여 조사한 자료를 바탕으로 침투해석과 사면안정해석을 실시하였다. 침투해석 결과 투수성이 낮은 기반암의 경우 상부에 국부지하수위면(perched water table)이 형성되며, 기반암과 토층사이에 macropore가 있을 경우에 사면내에 높은 압력수두가 발생되었다. 사면안정해석 결과 사면에 식생하는 나무는 자체의 무게가 하중으로 작용하여 사면의 안정을 저하시키는 요인이 되며, 토층이 얕고 뿌리의 보강효과가 불충분한 특성을 갖는 본 지역에 풍하중이 가미되면 이것이 충분한 사면 불안정의 요인임을 확인하였다. In order to investigate the mechanisms of landslide development, infiltration and stability analysis of slopes are performed based on the data obtained from the reconnaisance of Yongin County where numerous land-slides occurred in june 1991. The results of infiltration analysis show that a perched water table has formed within the upper soil layer when a impervious layer is located at the base. Contrary, high pore pressure is developed within the slope when macropores exist between the soil layer and bed rock. According to the slope stability analysis, the weight of trees acts as load and becomes a significant factor of lowering safety of slope for the soil layer which is shallow and the reinforcement of root is insufficient, especially, when the wind load is added.