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도시재생사업지구 내 단독주택의 자재물량 분석을 통한 건설폐기물 발생량 특성에 관한 연구
차기욱(Cha, Gi-Wook),홍원화(Hong, Won-Hwa),김진호(Kim, Jin-Ho),김영찬(Kim, Young-Chan) 대한건축학회 2017 大韓建築學會論文集 : 構造系 Vol.33 No.4
To ensure appropriate construction-waste management and establish a resource-cycling environment, it is imperative that consensus and databases be created on the amounts of construction debris and waste being produced. To that end, waste generation rate(WGR) can be a useful approach. This study targeted Korean detached houses and examined characteristics in the amounts of demolition waste(DW) and related demolition waste generation rate(DWGR) indexes. Based on the material quantity data of the targeted houses obtained by investigation prior to demolition, analysis of variance(ANOVA) and post hoc testing were carried out between amounts of DW and location(i.e., project A, B and C), building structural type (i.e., RC, block, brick, and wooden type) and actual use (i.e., residential only vs. residential-commercial). The findings showed that all nine types of demolition waste produced had been affected by location and structures of detached houses; and depending on the use of the houses, differences existed in the amounts of waste generated regarding certain waste types.
최적화기법을 이용한 금강상류지역 지표수-지하수 연계운영 및 갈수기 용수공급방안 검토
차기욱(Cha Keeuk),정태성(Cheong Tae Sung),고익환(Ko Ickhwan) 대한토목학회 2007 대한토목학회논문집 B Vol.27 No.5B
금강유역 상류에 용담댐이 건설되면서 댐 저수량의 대부분을 생공용수로 사용하는 전북권과 댐하류 생활ㆍ공업ㆍ농업용수 및 하천생태계를 위한 적정 하천유지용수를 요구하는 충청권사이에 용수이용에 대한 마찰이 발생하고 있다. 앞으로 이러한 수리권문제는 우리나라와 같이 가뭄이 주기적으로 반복되는 상황에서 수계별로 자주 발생할 수 있는데, 이러한 수리권 및 가뭄 문제를 해결하는 방안으로 저수지를 포함한 지표수-지하수의 연계운영은 하나의 대안이 될 수 있다. 본 연구는 용담댐에서 가뭄 또는 갈수로 인한 물부족 발생이 예상되거나 댐하류 하천환경용수의 증가가 필요한 경우 사용 가능한 지표수-지하수 연계운영방안을 제시하기 위한 것이다. 모의를 위하여 최적화방법을 토대로 한 LINGO 프로그램을 이용하여 산정된 용담댐 저수지 운영율, 미국 USGS에서 사용하는 RORA 프로그램으로부터 산정한 금강상류지역의 지하수 함유량과 지하수 펌핑에 의한 하천수 저감(stream depletion)은 지하수모델링 프로그램인 MODFLOW로부터 산정한 결과를 적용하였다. 지표수-지하수-저수지 연계운영을 모의하기 위하여 용담댐 저수지 운영율과 지하수 취수에 의한 하천수 손실 및 회귀수 등 지체 시간과 관련된 계수들을 미국 Colorado State University와 공동으로 개발한 KModSim에 적용하였으며, KmodSim에 의한 연계운영모형 수행 결과 갈수나 가뭄에서 저수지와 하천수-지하수를 적절하게 이용할 경우 물부족과 댐하류지역의 하천유지용수 부족을 현저히 줄일 수 있는 것으로 나타났다. 따라서 용담댐에 적용한 저수지운영율과 댐하류 하천수 및 지하수를 연계하여 관리한다면 효율적인 수자원관리가 시행될 수 있을 것으로 분석되었다. There are conflicts between Junbuk area where the municipal and industrial waters are supplied from Yongdam reservoir and Chungchung area located in downstream of Yongdam reservoir which reservoir supplies the municipal, the industrial, the agricultural water, and the instreamflow for river habitat after Yongdam reservoir construction in upper region of Geum River Basin. The interactions between the surface and ground waters within the reservoir operation is an alternative plan as a solution of these conflicts problems in the area where drought are repeated periodically. The objective of this study is for suggesting the surface water and the ground water interactions which management scenarios are used in the cases of respecting to the water supply deficits for drought season or increasing of instreamflow in downstream of Yongdam reservoir. For the test simulation, the operation rules of the Yongdam reservoir is developed from LINGO optimization model, ground water recharge is estimated from the RORA method used in USGS, and stream depletion by pumping is estimated from the ground water modeling such as MODFLOW. The optimized reservoir operation rules, lag coefficients related in the interactions between the surface water and the ground water, and lag time intervals of return flow are used in KModSim developed in collaboration with Colorado State University. The KModSim simulation results show that the effective operations for the reservoir and ground water and surface water interactions significantly reduce the deficits of water supplies and instreamtlow in downstream of Yongdam reservoir. Thus, the effective water resources management is proven with the optimized reservoir operation rules applied in Yongdam reservoir and interaction between the surface water and ground water.
도시재생사업지구에서 배출된 건설폐기물의 해체단계에서 최종 처리단계까지 종류별 CO₂ 발생량에 관한 연구
차기욱(Cha Gi-Wook),손병훈(Son Byeung-Hun),홍원화(Hong Won-Hwa) 대한건축학회 2010 대한건축학회논문집 Vol.26 No.7
Recently, various politics for reducing greenhouse gases have been promoted in home and abroad. In domestic construction fields, struggle for reducing greenhouse gas like carbon dioxide is being made a demand in domestic industry as well. In particular, most of greenhouse gases are resulted from using fossil fuels. Construction industry spends a quarter on the volume of fossil fuel consumption. Carbon dioxide is generated by various sources like production, transportation, construction, maintenance, removal stage in life cycle of buildings. Throughout buildings' life, construction wastes generated in construction or removal stage are a factor of CO₂ emissions. In this paper, it is calculated CO₂ emissions of construction wastes by types based on LCA and IPCC guideline.
토지이용특성에 따른 도시 역세권의 에너지소비 특성에 관한 연구
차기욱(Cha Gi-Wook),전규엽(Jeon Kyu-Yeob),홍원화(Hong Won-Hwa) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(계획계)
The propose of this paper is to analyse an energy consumption according to characteristic of land use within subway adjacent area. First of all, GIS is used to analyze subway adjacent area’s land use quality. Then, Cluster Analysis was performed with land use area and construction area that is within 500m around station. Through those processes, several types are classified subway adjacent area of city. The characteristics of energy consumption are realized according to building-to-land ratio, floor area ratio and energy unit. By research finding, Railway Station Area are divided into four groups. And it shows distinct differences between final energy consumption and consumption structure by Railway Station Area types.
단독주택 유형별 폐기단계 CO<SUB>2</SUB> 배출량 특성에 관한 연구
차기욱(Cha, Gi-Wook),홍원화(Hong, Won-Hwa),김진호(Kim, Jin-Ho) 대한건축학회 2017 大韓建築學會論文集 : 構造系 Vol.33 No.3
Recently, construction industry has been seeking various countermeasures to realize eco-friendly and sustainable development and resource recycling construction industry. Meanwhile, currently, detached houses that a lifetime limit comes account for a considerable proportion in Korea. For such reason, the problem with the increase in construction waste and environmental pollution are expected. Therefore, this research carried out a study on indicators of demolition waste generation and CO2 emissions in end-of-life(EOL) phase for 854 detached houses. For that, this study calculated demolition waste generation by detached house type using volume of material data in buildings investigated before dismantling. In addition, the data of the specifications on the equipment applied in EOL phase of the building through field investigation and existing literature was constructed. As a result of this study, it was found that demolition waste generation indicators by type were RC house: 2048.65kg/m<SUP>2</SUP>, brick house: 1170.74kg/m<SUP>2</SUP>, block house: 1053.59kg/m<SUP>2</SUP>, wooden house: 999.79kg/m2. And CO2 emissions by house type were found to be RC house: 11.273kg/m<SUP>2</SUP>, brick house: 6.847kg/m<SUP>2</SUP>, block house: 4.629kg/m<SUP>2</SUP>, wooden house: 4.864kg/m<SUP>2</SUP>. But, the CO2 emission in the demolition and transportation stage of RC/brick house was similar levels to the value. On the other hand, the CO2 emission in the transportation stage of block/wooden house was higher than one of demolition stage in EOL phase.