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목적지향형 건축물 전과정 CO₂ 평가 프로그램(LOCAS) 개발
노승준(Roh, Seung-Jun),태성호(Tae, Sung-Ho),백정훈(Baek, Cheong-Hoon),신성우(Shin, Sung-Woo),이주호(Lee, Joo-Ho),이준서(Lee, Jun-Seo),안장호(An, Jang-Ho) 대한건축학회 2012 大韓建築學會論文集 : 構造系 Vol.28 No.1
This study purports to construct a system that assesses the life cycle CO₂ emissions of a building according to the progress of the construction project and to thus develop a object-oriented building life cycle CO₂ assessment program that can execute a comprehensive evaluation of the CO₂ emissions resulting from construction activities. To achieve this, this study first investigated the standards of the ISO 14040 Series and trends in domestic and international studies on the life cycle CO₂ emission assessment program for a building after analyzing the study trends and necessary elements; then, items and methods of building life cycle assessment that are suitable to the conditions in Korea were chosen. The composition of the building life cycle CO₂ assessment program was subdivided into 4 systems : a simplified assessment system, a detailed assessment system, a site assessment system, and an assessment analysis system, according to the object of the building life cycle CO₂ assessment and by reviewing the range and timing of the building life cycle assessment by construction project phase. A database that can be applied efficiently to this study was constructed following an analysis of the computation technique for the CO₂ basic unit of each construction material and energy source as well as the characteristics of the construction materials depending on the usage, structure, and form of the building. As a result, the computation model and assessment technique for elements to be assessed for the simplified assessment system, the detailed system, the site assessment system, and the building life cycle CO₂ assessment system by construction project phase were obtained, and the object-oriented building life cycle CO₂ assessment program (LOCAS) was developed by integrating these systems.
목적지향형 건축물 전과정 $CO_2$ 평가 프로그램(LOCAS) 개발
노승준,태성호,백정훈,신성우,이주호,이준서,안장호,Roh, Seung-Jun,Tae, Sung-Ho,Baek, Cheong-Hoon,Shin, Sung-Woo,Lee, Joo-Ho,Lee, Jun-Seo,An, Jang-Ho 대한건축학회 2012 대한건축학회논문집 Vol.28 No.1
This study purports to construct a system that assesses the life cycle $CO_2$ emissions of a building according to the progress of the construction project and to thus develop a object-oriented building life cycle $CO_2$ assessment program that can execute a comprehensive evaluation of the $CO_2$ emissions resulting from construction activities. To achieve this, this study first investigated the standards of the ISO 14040 Series and trends in domestic and international studies on the life cycle $CO_2$ emission assessment program for a building after analyzing the study trends and necessary elements; then, items and methods of building life cycle assessment that are suitable to the conditions in Korea were chosen. The composition of the building life cycle $CO_2$ assessment program was subdivided into 4 systems : a simplified assessment system, a detailed assessment system, a site assessment system, and an assessment analysis system, according to the object of the building life cycle $CO_2$ assessment and by reviewing the range and timing of the building life cycle assessment by construction project phase. A database that can be applied efficiently to this study was constructed following an analysis of the computation technique for the $CO_2$ basic unit of each construction material and energy source as well as the characteristics of the construction materials depending on the usage, structure, and form of the building. As a result, the computation model and assessment technique for elements to be assessed for the simplified assessment system, the detailed system, the site assessment system, and the building life cycle $CO_2$ assessment system by construction project phase were obtained, and the object-oriented building life cycle $CO_2$ assessment program (LOCAS) was developed by integrating these systems.
Cu-16 at % Ag 미세복합재료의 미세구조와 전도도
임문수,안장호,홍순익,Im, Mun-Su,An, Jang-Ho,Hong, Sun-Ik 한국재료학회 1999 한국재료학회지 Vol.9 No.6
In this study, the effect of the microstructural evolution on the electrical of Cu-Ag microcomposite was investigated. The nature of interfaces between silver filaments and Cu matrix may have pronounced effects on the physical properties of Cu-Ag filamentary microcomposites, little is known about these interfaces. In heavily drawn Cu-Ag filamentary microcomposities, the microstructure is too fine and the interfacial area is too large to maintsin a stable internal dislocation structure because of closely spaced filaments. Rather, most dislocations are thought to be gradually absorbed at the interfaces as the draw ratio increases. The mechanical and electrical properties of Cu-Ag filamentary microcomposites wires were also examined and correlated with the microstructural change caused by thermomechanical treatments. The study on the electrical conductivity combined to resistivity in Cu-Ag filamentary microcomposites and the rapid increase of the electrical conductivity at high annealing temperatures is mainly caused by the dissolution and coarsening of silver filaments. The relatively low ratio of the resistivities is mainly caused by the dissolution and coarsening of silver filaments. The relatively low ratio of the resistivities at 295K($\rho$\ulcorner/$\rho$\ulcorner) in as-drawn Cu-Ag microcomposites can also be explained by the contribution of the interface scattering.
Cu-9Fe-1.2X (X=Ag, Cr, Co)계 미세복합재료전선의 기계적 특성 및 전기전도도
송재숙,임문수,안장호,홍순익,Song, Jae-Suk,Im, Mun-Su,An, Jang-Ho,Hong, Sun-Ik 한국재료학회 2000 한국재료학회지 Vol.10 No.1
본 연구에서는 열가공공정을 거쳐 제조된 Cu-Fe-Xi(Xi=Ag, Cr 또는 Co) 미세복합재료의 미세구조와 기계적 특성 및 전기적 특성에 대하여 조사하였다. 냉각가공 중에 수지상정들은 인발 방향에 평행하게 배열되고 필라멘트 형태로 연산되었다. Ag를 첨가한 미세복합재료가 같은 가공율에서 Co나 Cr를 첨가하는 미세복합재료보다 미세조직이 더욱 미세하게 관찰되었다. 제3첨가원소로 Ag를 함유하고 있는 Cu-Fe-Ag 미세복합재료의 강도와 전도도는 Co나 Cr를 첨가하는 미세복합재료보다 높게 나타났다. Cu-Fe-Ag 미세복합재료의 우수한 기계적 성질과 전기적 특성은 Ag가 함유되어 있는 경우 필라멘트의 미세성과 균일성이 높게 관찰되는 것과 관련이 있다. Cu-Fe-Xi 미세복합재료의 강도는 Fe 필라멘트의 간격을 고려한 Hall-Petch 형태의 식과 일치한다. Cu-Fe-Xi 미세복합재료의 파괴는 연성파괴가 관찰되었다. In this study, microstructure and mechanical properties and electrical conductivities of in situ Cu-Fe-Xi(Xi=Ag, Cr or Co) alloy wires obtained by cold drawing combined with intermediate heat treatments have investigated. During cold working the primary and secondary dendrite arms are aligned along the drawing direction and elongated into filaments after deformation processing. The addition of Ag was found to be more effective in reducing the microstructural scale at the given draw ratio than that of Co or Cr throughout the drawing processing. The ultimate tensile strength and the conductivity of the Cu-Fe based composites containing Ag were higher than those of Cu-Fe composites containing Co or Cr. The good mechanical and electrical properties of Cu-Fe-Ag wires may be associated with the more uniform distribution of the finer filaments in the wires containing silver. The strength of Cu-Fe-Xi composites is dependent on the spacing of the Fe filaments in accord with a Hall-Petch relationship. The fracture surfaces of all the specimens showed ductile-type fracture and iron filaments occasionally observed on the fracture surfaces.