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홍은호 부천대학 1998 論文集 Vol.19 No.-
The beam and the column have a very important function in SRC structure as all constructive structures. As the calculation of the beam, especially in the bendable member, the bending moment depends on the load condition and the supporting method at the end of the beam. The twisting moment occurs in the beam on the occasion of the high deflection due to the long span. As the result of the shearing force in the beam, every beam should be designed under the consideration of the safety for bending moment and shearing force. The column is the member that receives the compressive force along the axial line. The framework column, in many cases, receives not only the axial load but the bending moment. Because the ordinary column receives the bending moment from the beam or roof beam, the section of the column should be designed to be big enough for the effect against the bending force. This is the best policy to protect it from the buckling of the column. And in steel structures, the joint of the column or beam should be designed to transfer the axial force, shearing force and bending moment safely. It is essential to determine the joint to have less stress and even if it receives less stress, it should be joined with some allowances. The joint should be welded, riveted or bolted, under the deep consideration of dynamical judgement.
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홍은호 부천대학 2001 論文集 Vol.22 No.-
곡면구조(the curved surface structure)는 물리학적으로 곡률(曲律)에 의해 외부에서 작용하는 하중을 효과적으로 지탱할 수 있는 곡면(雌面構造)구조로서 현대 건축은 물론 고대인(古代人)들도 많은 관심을 가지고 있었을 뿐 아니라 건축 활동에 많이 활용되었다. 곡면구조의 물리학적 특징은 결국, 여러 형태의 분포하중에 대하여 면내방향(面內方向)의 응력에 의해 저항하는 막응력(膜腐力:membrane stress) 상태가 성립한다. 평면응력과 유사한 막응력 상태는 쉘구조(shell structure)를 막이론(membrane theory)에 의해 해석할 수 있는 근거가 된다. 그렇지만 외력 및 경계조건의 불연속점 부근에서는 막응력보다 휨모멘트(bending moment)의 영향이 더 커진다. 이와 같이 막응력과 휨모멘트가 혼성된 응력 상태를 취급하는 것이 쉘의 힘이론이다. 그러나 지금까지는 미해결(未解決)된 부분이 해결된 부분보다 훨씬 많은 것이 또한 사실이다. The curved surface structure is curved one which is able to bear the external load. effectively by the curvature physically, and the ancients were much interested in the shell structure and it is also being applied for the field of modern architectures. And so, the mechanical characteristics of the curved surface structure is to be the membrane stress condition by the internal- stress against various distributed loads. The membrane stress condition resembled the surface stress is the fundamentals to be able to solve the shell structure by the membrane theory. But the bending moment is more effective than the membrane stress, near the discontinuity point of the boundary condition and the external force. Like this, to treat the stress condition composed of the membrane stress and the bending moment is the shell bending theory. But up to now, as a matter of fact, we have much more unsolved problems rather than solved ones.
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홍은호,이충렬 부천대학 2004 論文集 Vol.25 No.-
現代의 高層建物設計는 强風이나 地震荷重으로부터 構造物의 安全性 및 使用性과 居住者의 便安함을 提供하는 問題들을 包含한다. 現代 高層建物의 剛性과 質量은 더 강한 材料와 複合 構造시스템을 使用하여 줄이고 있다 剛性과 質量의 減少는 과도한 水平振動으로부터 構造物에 발생할 수 있는 問題의 가능성을 줄여 준다. 居住者의 便安함과 安全性을 增加시키는 效果的인 方法을 硏究하는 革新的인 엔지니어들은 2가지 形態의 振動制御시스템을 사용한다. 하나는 受動制振시스템이고 다른 하나는 能動制振시스템이다. 이 論文은 受動制振시스템중에 同調液體댐퍼(Tuned Luquid Damper)에 대해 다루고자 한다. 선박에서 널리 사용되어진 TLD는 最近 構造物의 振動制御를 위해 사용되고 있다. TLD는 움직이는 質量으로서 물 또는 다른 液體를 사용하고 復原力은 重力을 사용한다. 에너지 吸收는 液體와 容器의 摩擦과 液體流動시의 출렁거림으로 한다. 構造物의 運動에너지를 吸收하는 TLD의 基本 原理는 TMD와 같다. The design of modern tall buildings involves certain problems, such as safety and serviceability of the structure and comfort of occupants result from strong wind or earthquake loads. The stiffness and mass of modern tall buildings have been reduced by using higher strength materials and better integrated structural systems. These decreases in stiffness and mass have increased the possibility of structural problems arising from excessive lateral vibration. Innovative engineers in their search for effective ways of increasing the comfort and safety of occupants make use of two types of vibration control system. One is passive control system and the other is active control system. This thesis deals with the tuned liquid damper of passive control systems Tuned liquid dampers which have been widely used in ships are recently implemented for vibration control of structures. A TLD uses water or other liquids as the moving mass and restoring force is generated by gravity. Energy absoption comes from boudaries between liquid and containers and turbulence in the liquid flow. The basic principle of TLD to absorb kinetic energy of the main structure is the same as TMD.
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洪殷鎬 부천대학 1992 論文集 Vol.13 No.-
The prestressed concrete member at the ultimate limit state in bending may be considered to be similar to that of a reinforced concrete member, The PS concrete is weak in tensile force and which is provided a compression force to it by bonding pretensioned high strength wires (bars or strands) and concrete. And the defects of the concrete can be removed perfectly by utilizing and combining the characteristics of the two materials technically and economically. There will be no cracks in the concrete since no tensile stress is provided in the concrete by offsetting the compressive stress and temsile stress by external force. The stress, strain, bending etc. by the concrete can be calculated correctly by means of a elastic analysis method unless cracks by external force are occurred in the concrete. The cross section of the member for a given load can be reduced since high strength steel and concrete are used, and as well as a considerable amount of materials will be reduced than that in case of the reinforced concrete.
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洪殷鎬 부천대학 1980 論文集 Vol.1 No.-
This research, placing emphasis on the normal distribution, aims to examine the symmetric distribution and the Demoivre-Laplace Limit Theorem Which have direct Correlation with it. The normal distribution origined in the research of the probablity form the foundation of Central Limit Theorem and take possession of very important part in the field of mathematical statistics. The mathematical statistic arisen from the normal distribution has brought us the poignant realization of the fact that this statistics plays an important role in the matter of various statistics and pelicy-making in the present states and all of these results are considered to be merits and appointed task of present mathematic. Accordingly, this research presents various phenomenons of the normal distribution and through the proof of them aims to take a part in mathematical development.
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