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鐵筋콘크리트 獨立基礎의 사다리꼴 解析과 長方形 解析에 있어서 剪斷力에 對한 比較 硏究
李炅基 서울産業大學校 1989 논문집 Vol.30 No.1
This paper examines the correlation between shearing stress and allowable one for one-way and two-way shearing force of RC single footing at the rectangular analysis. Moreover, it is written to search for the ratio of one-way sheraing stress of ladder-form analysis to one of rectangular analysis. To do so, it is assumed that the structure have the same value of ground reaction and the 4weeks compressive strength of concrete, as well as the same dimnension of footing and column, at the two analysis. The results of analysis is summarized as the following (1) At the rectangular analysis, one-way sheraing force is larger than two-way in the ratio of shearing stress to allowable one. (2) The ratio of one-way shearing stress of ladder-form to that of rectangle is larger than one for any case. That is, the safety factor of the former is lower that the latter.
垂直荷重에 對한 精算法과 略算法에 依한 Rahmen의 휨모우먼트 값의 誤差率에 對한 硏究
李炅基 서울産業大學校 1982 논문집 Vol.17 No.1
To identify the safety of the multi-storey structure, in the first place, we must calculate the bending moment over the each members of Rahmen by load. In calculating the bending moment, it is used the method of exact calculation and one of approximate calculation. The subject of this study is to com-pare the difference ratio of the two results of bending moment by the former and the latter. For the calculation, it is assumed to the 1:1 and 1:2 as the ratio of dead and live load to the stiffness ratio of the same rahmen, and used the method of moment distribution and the two cycle method. As a result, it is showed that the bending moment by the method of approximate calculation ranges from 0.7 to 1.3 times of that of exact method. But, as the safety factor of materials has to be considered, the difference ratio of bending moment by the two methods has not only a slight effect upon the structure, but also is negligible.
이경기 대한감염학회 2010 Infection and Chemotherapy Vol.42 No.1
Since rabies virus infection is fatal for both human and animals, the protective immunization by vaccines against animals is a critical importance for disease prevention and control. In Korea, recurrence of sylvatic rabies was reported in Gangwon province, which is the northern border area in 1993. During the years of 1994-2009, 417 animal rabies cases were registered in Gangwon and Gyeonggi provinces. The national animal rabies eradication program has performed to reduce rabies outbreaks by annual vaccination of dogs and cattle since 1995, and the oral vaccination of raccoon dogs with annual vaccinia-rabies glycoprotein (V-RG) bait vaccine. Additionally, serological surveillance on domestic animals has been executed since 1999 to monitor the anti-rabies antibody titers from Gangwon and Gyeonggi provinces where the vaccination campaign has been implemented.
複筋比의 變化에 따른 長方形 보의 抵抗 모우먼트에 對한 硏究
李炅基 서울産業大學校 1979 논문집 Vol.12 No.1
In most cases, beams in the buildings are used doubly reinforced rectangular beams which reinforce concrete beams with rectangular cross section with reinforcement for both tension and compression forces. Here I assume the ratio of width to depth of the rectangular cross section determines 1.5 and tile ration of the cross section area of beams suppose 1.0, 1.8, 2.8, and the ratios of doubly reinforced beams 0.2. 0.4, 0.6, 0.8. 1.0 respectively. In these cases, the magnitude of the allowable bending moment factor of the compression side R₁and the magnitude of the allowable bending moment factor of the tension side R₂are changed as follows: R₁s are increased 1.0, 2.0, 2.5, 3.5, 4.2 but R₂s are mostly constant in spite of the change of the magnitude of the cross section area of concrete beams and doubly reinforcement ratios. I can find in this study that the values of the bending moment depending on the tension steel reinforcement have nothing to do with the compression steel reinforcement, and the magnitude of the allowable bending moment factor of the tension side donot have an effect on both the magnitude of the cross section area and the ratio of the compression steel reinforcement to the tension steel reinforcement if the ratio of width to depth of the rectangular cross section of the beam is constant.
탄소저감을 위한 신도시토지이용의 공간단위별 연계요인 설정 연구
이경기,조진희 충북연구원 2014 지역정책연구 Vol.25 No.1
Climate change is already raised as a global issue that is linked to the survival of humanbeing. About 75% of fossil fuel is consumed in the cities (EIA, 2007). Korea also consumes about 44.0% of final energy in the cities. Taking it into consideration, a plan for efficient land use in cities is necessitated in order to reduce and absorb CO2. The purpose of this study is to establish a land use model for increasing the connection of planning elements to ensure carbon reduction. Boundaries of space were classified as a small-sized life zone, connection of small- and middle- sized life zone, a middle-sized life zone, connection of middle- and small- sized life zone, and a large-sized life zone. In the first survey, specialists were asked to answer the questionnaire so planning indexes were developed for each zone. In the second survey, replicated MDS was used to define connection of planning elements and the application of model was attempted. The significance of the study is that it explores the connection of planning elements for carbon reduction and makes efforts to establish a model for land use of a new city, in comparison with past studies, which focused on defining planning elements and applying to a specific zone. -