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주택재개발 정비 사업으로 인한 주변학교 일조권 분석 연구
조창근,임웅석,임태섭 한국생활환경학회 2020 한국생활환경학회지 Vol.27 No.3
Owing to redevelopment projects, the infringement of the right to light of existing buildings around a construction project occurs frequently, and problems, such as disputes with the residents of existing buildings regarding the right to light, are increasing. Analysis and evaluation of the infringement of the right to light were conducted by applying the school sunshine right evaluation criteria. The infringement of the right to light was prevented by reflecting the adjustment of the height and number of floors of new buildings and the method of orientation of building in the project site in the design of the building. The damage to a building’s solar system should be designed using tools, such as solar thermal simulation. In this study, the number and height of newly constructed apartments were adjusted through the analysis of the impact of the right of sunlight to be applied to the design from dissatisfaction with the right of sunlight to satisfaction.
조창근,김영상 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.3
In formulations of frame finite element, the shortcoming of the displacement-based finite elements, so called the stiffness method, are their inability to satisfy the equilibrium in the element level by using the displacement shape functions. This assumption leads to inaccurate results of the sectional moment and curvature distributions in highly nonlinear regions. This study presents a force-based frame fiber finite element formulation that can satisfy the equilibrium not only in the element level but also in the structural level. The force-based finite element formulation is based on the force-interpolation functions within the element without using the displacement shape functions. Compared with the stiffness method using some examples for the nonlinear analysis of prismatic and nonprismatic beam-columns, the presented model offers more accurate predictions not only in the load-deflection relationships but also in the distributions of sectional forces and deflections in highly inelastic regions.
조창근,김하근 한국소음진동공학회 1997 소음 진동 Vol.7 No.4
사회기반시설의 확충, 도시재개발 등을 위하여 대규모 건설공사가 증가하고 있으며, 공기단축과 인건비 절감 등을 위하여 건설현장에서는 대형 건설장비가 사용되고 있다. 최근 들어 주민들의 안전, 환경에 대한 의식수준이 높아지면서 이들 건설공사장에서 발생하는 소음.진동 때문에 많은 건설공사장에서는 민원해결을 위하여 상당한 비용을 지불하고 있는 실정이다. 본 고에서는 국내 건설공사장에서 발생하는 소음.진동의 합리적인 저감대책을 수립하기 위하여 국내 건설공사장의 소음.진동 발생실태와 대책사례, 문제점 등을 소개하고자 한다.
조창근,Hee-Cheon Yun,김윤용 사단법인 한국계산역학회 2009 Computers and Concrete, An International Journal Vol.6 No.2
In the current research, a displacement-based seismic design scheme to retrofit reinforced concrete columns using FRP composite materials has been proposed. An accurate prediction for the nonlinear flexural analysis of FRP jacketed concrete members has been presented under multiaxial constitutive laws of concrete and composite materials. Through modification of the displacement coefficient method (DCM) and the direct displacement-based design method (DDM) of reinforced concrete structures, two algorithms for a performance-based seismic retrofit design of reinforced concrete columns with a FRP jacket have been newly introduced. From applications to retrofit design it is known that two methods are easy to apply in retrofit design and the DCM procedure underestimates the target displacement to compare with the DDM procedure.
철근콘크리트 보의 휨 및 전단파괴 예측의 3차원 유한요소 모델
조창근,하기주 한국구조물진단유지관리공학회 2010 한국구조물진단유지관리공학회 논문집 Vol.14 No.6
철근콘크리트 보의 휨 및 전단파괴 예측을 위한 철근콘크리트 부재의 3차원 유한요소모델을 개발하였다. 다축구속응력 하에서의 콘크리트의 연성거동을 보다 정확히 예측하기 위해 변형률 공간에서의 콘크리트 파괴기준을 제시하였다. 3축하에서의 콘크리트 균열거동을 위해 균열발생 후 인장연화거동, 골재맞물림 및 다우얼효과를 고려한 균열면 전단전달특성을 고려토록 하였다. 휨 및 전단 파괴 양상을 갖는 보 시험체와의 비교 연구를 통하여 본 유한요소 모델은 저보강보의 연성 휨 파괴 뿐만 아니라 전단보강되지 않은 철근콘크리트 보의 취성 전단 파괴 양상을 갖는 부재의 거동 예측에도 유효한 것으로 판단되었다. Three-dimensional finite element model for analysis of reinforced concrete members was developed in order to investigate the prediction of bending and shear failure of reinforced concrete beams. A failure surface of concrete in strain space was newly proposed in order to predict accurately the ductile response of concrete under multi-axial confining stresses. Cracking of concrete in triaxial state was incorporated with considering the tensile strain-softening behavior of cracked concrete as well as the cracked shear behavior on cracked surface of concrete caused by aggregate interlocking and, dowel action. By correlation study on failure types of bending and shear of beams, current finite element model was well simulated not only the type of ductile bending failure of under-reinforced beams but also the type of brittle shear failure of no-stirruped reinforced concrete beam.