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진동시험을 통한 강판콘크리트(SC) 전단벽의 저응력수준에서의 구조 감쇠비 규명
조성국,소기환,김두기,한상묵,Cho, Sung Gook,So, Gihwan,Kim, Doo Kie,Han, Sang Mook 대한토목학회 2015 대한토목학회논문집 Vol.35 No.2
SC (steel plate concrete)구조는 새로운 구조형식으로서 SC구조물의 내진설계에 적용할 수 있는 감쇠비의 규명이 필요하다. 이 연구에서는 실험적 방법을 통해 SC구조의 감쇠비를 분석하였다. 연구를 위하여 SC 전단벽 시편을 제작하고, 대형 진동대를 이용하여 진동시험을 수행하였다. 시험에서 계측한 가속도응답신호는 전달함수로 변환한 후 동적실험모드분석기법을 적용하여 분석하였다. 구조물의 감쇠비는 입력운동의 수준에 따라 달라질 수 있으며, 이 연구의 실험에서 적용한 입력운동의 수준은 시편의 항복강도의 절반보다 낮은 수준으로서 여기서 분석된 구조감쇠비는 약 4%정도이다. 이 연구결과를 고려하여 SC구조물의 운전기준지진에 대한 내진설계에는 4% 감쇠비를 적용할 수 있을 것으로 판단된다. Steel plate concrete (SC) structure has been developed as a new structural type. Rational damping value shall be determined for the seismic design of SC structure. This study evaluated damping ratio of SC structure through experiments. For the study, a SC shear wall specimen was constructed and dynamically tested on the shaking table. Acceleration time history responses measured from testing were converted to the transfer functions and analyzed by using experimental modal analysis technique. The structural damping ratio of the specimen was identified as 4% to critical. Considering the shaking table test was performed at the excitation level corresponding to the low stress level of the specimen, 4% could be suggested as a structural damping for design of SC structure for operating basis earthquake.
조성국(Cho Sung-Gook) 한국부동산법학회 2003 不動産法學 Vol.9 No.-
Based on her radical reformations and opening these days, China made the switchover of typical planned economic system to market economic system. As china regard a market economic structure as a law-governed economy structure, She concentrate her effort on the legislation of market economy structure, within her cognizance that success of market economy require legislation completion at the back In this article, on the purpose that our understanding the present and figuring out the tomorrow of China's Real right law, the first, we study the lawmaking process of civil law. the second, we examine new Real right law draft, and finally we try to solve problem awaiting solution The goal of china's plan is materializing the both market economic legal systems and ideal socialism in 2010. In the progress of this plan, china codified the Constitution and each organic law but civil code. but the major part of civil code -the general provisions of the civil code, contract law, the law of succession, the law of marriage and intellectual property law- enacted except Real right law. In the case of Real right law, as China have already made Real right law draft (a proposal bill), the codifying China's Real right law must be realized after clearing up what the problems of codifying are and what the solution are.
조성국(Cho Sung Gook) 북한법연구회 2004 북한법연구 Vol.7 No.-
북한의 부동산제도 특히 토지제도는 社會主義的 土地制度에 입각하고 있다. 근래에 토지이용권의 인정에 의하여 약간의 변화가 일어나고는 있지만 근본적으로는 종전처럼 사회주의적 토지소유제도를 운용하고 있으며, 토지에 대한 매매,담보> 상속이 허용되지 않고 있다. 중국의 부동산제도는 토지개혁에 의하여 토지가 중농에게 집중되었고> 이를 해결하기 위하여 農業의 集團化가 추진되었다. 그러나 集團耕作 방식은 농민들의 農業生章에 대한 적극성을 상실하여 農業經濟가 피폐하게 되는 원인이 되어 1985년에 人民公司가 해체되고 가정별 都給經營이 전면적으로 실시되었으며, 농촌경제의 급격한 변화는 중국의 改革 • 開放을 가속화시킨 결정적인 계기가 되었던 것으로 평가된다. The real estate system of North Korea, especially the land system is based on the socialistic land system. Recently it is chaining a bit on the land system because it is permitted the use right of land by the North Authority. But fundamentally it is still used socialistic land system as in the past, it can’t permit about buying and selling, mortgage, inheritance of land in the North Korea. In the land system of China, the land is concentrated to the middle- class farmer by the land reformation. So in other to solve this problem, it goes ahead with the collectivization of agriculture. But the method of collective cultivation is caused to exhaust agriculture economy because of wanting by the fanners agriculture production. Therefore People s Corporation was dissolved in 1985 and man^ement of contract for work in each family is enforced generally. The sudden change in rural economy is evaluated decisive opportunity that accelerates reformation and opening in China.