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황보석,HwangBo, Seok 한국공간구조학회 2004 한국공간구조학회지 Vol.4 No.4
The analysis method of stabilizing process and its program regarding large spatial structural systems are described in this paper. In this paper, the analysis of stabilizing process of the example structures, namely Olympic Fencing Arena, is performed and the jacking force of stabilizing process is proposed, and the characteristics of structural behavior is investigated. This result of research is applied to the design and construction of the actual structures and the reliability of the analysis is verified through comparison of the analysis results and the measured results in the field. When the analytical results is compared with the actual structural behavior, there is a little difference, but it is thought that the analysis results are quite reliable because it is very similar to the measured values in spite of construction and measurement errors.
單層 래티스 돔의 斷面算定法에 있어서의 形狀初期不完全性의 影響
김종민(Kim. Jong-Min),황보석(Hwangbo. Seok),한상을(Han. Sang-Eul) 대한건축학회 2004 大韓建築學會論文集 : 構造系 Vol.20 No.7
First author proposed a proportioning method for member sections of rigidly jointed single layer reticulated dome subjected to<br/> uniform and non-uniform load without any geometrically initial imperfection, and discussed the validity and effectiveness of the<br/> method which was based on linear buckling stress and a knock down factor. However, the buckling of a single layer reticulated<br/> dome is strongly affected by geometrically initial imperfection. It is well known that geometrically initial imperfections reduce the<br/> nonlinear buckling capacity of a single layer reticulated dome. Thus, structural engineers may be recommended to reflect the effects<br/> of geometrically initial imperfections in proportioning member sections.<br/> In this paper, firstly, the presented proportioning method by first author is applied to dome without consideration of any<br/> imperfections and the thickness and diameter of each member are determined. Secondly, the load bearing capacities of the<br/> proportioned domes are checked with geometrically initial imperfection by the inelastic buckling analysis.
An Eurpium(III) Hydrolytic Catalyst Favoring Anionic Phosphate Esters over Phosphate Triester'
윤창원,오순진,전영진,최영서,손윤경,황보석,구자강,박준원,Yun, Chang Won,O, Sun Jin,Jeon, Yeong Jin,Choe, Yeong Seo,Son, Yun Gyeong,HwangBo, Seok,Gu, Ja Gang,Park, Jun Won Korean Chemical Society 2001 Bulletin of the Korean Chemical Society Vol.22 No.2
A Cryptate (221) having a short alcohol pendant (2) was metallated with europium(Ⅲ) in anhydrous condition, and its hydrolytic activity for phosphate esters at neutral pH was examined. While the activity for the phosphate diester and monoester is comparable to that of the parent metal complex [1Eu]3+, its hydrolytic activity towards a phosphate triester is significantly suppressed. Potentiometric titration and luminescence spectroscopic studies for the equilibrium behavior of the complex in solution suggest that a dimer formation through the metal hydroxides as well as the pendant alcohol is likely to happen. The low hydrolytic activity for the triester seems to be associated with the dimer formation.