• Geomechanics and Engineering
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• 제19권3호
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• pp.255-268
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• 2019

Taking top-coal caving mining face (TCCMF) as research object, this paper considers the combination of top-coal and immediate roof as cushion layer to build the solution model of support resistance based on the theory of elastic foundation beam. Meanwhile, the physical and mechanical properties of coal-rock combination influencing on strata behaviors is explored. The results illustrate that the subsidence of main roof in coal wall increases and the first weighting interval decreases with the increase of top-coal and immediate roof thicknesses as well as the decrease of top-coal and immediate roof elastic modulus. Moreover, the overlying strata reflecting on support has negative and positive relationship with top-coal thickness and immediate roof thickness, respectively. However, elastic modulus has limit influence on the dead weight of top-coal and immediate roof. As a result, it has similar roles on the increase of total support resistance and overlying strata reflecting on support in the limit range of roof control distance. In view of sensitive analysis causing the change of total support resistance, it can be regards as the rank of three components as immediate roof weight > overlying strata reflecting on support > top coal weight. Finally, combined with the monitoring data of support resistance in Qingdong 828, the validity of support resistance determined based on elastic foundation beam is demonstrated, and this method can be recommended to adopt for support type selecting in TCCMF.

• 한국생활환경학회지
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• 제21권6호
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• pp.959-964
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• 2014

Energy performance of building envelope components, including external walls, floors, roofs, windows and doors, is crutial for determining how much energy is required for heating and cooling in a building. Among various building technologies, a green roof system can be a good option for reducing heat gain and loss in new buildings as well as existing buildings for green remodeling. This paper evaluates the performance of green roof systems according to soil depth and Leaf Area Index (LAI) for existing buildings. It also attempts to quantify the energy saving effects on new and existing buildings with different insulation levels. Thermal performance of green roofs is mainly dependent on soil thickness and LAI. Installation of green roofs in deteriorated existing buildings can lead to improvements in roof insulation, due to the soil layer. An increase in soil depth leads to a decrease in heating load, regardless of conditions of vegetation on the green roof. Larger LAI values may reduce cooling loads in the cooling season. Installation of green roof in deteriorated existing buildings showed bigger energy saving effect in comparison to a case in new buildings. A simulation study showed that the installation of green roof systems in deteriorated existing buildings with low insulation levels, due to low thermal performance requirements when constructed, could improve the energy performance of the buildings similar or better to the peformance on new buildings with the most updated insulation standard. Thus, when remodeling a deteriorated building, green roofs could be a good option to meet the most recent energy requirements.

• 한국실내디자인학회논문집
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• 제23권2호
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• pp.147-155
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• 2014

The purpose of this study was to investigate expression characteristics of korean traditionality in restaurants & Ccfes which adapted thatched roof & shingle-roofed house. As a method of this study, a case study was made to investigate for exterior and interior elements(roof type, facade, floor, wall, ceiling, door & window) of 12 restaurants & cafes in Seoul and Kyunggi Province from June 10, 2013 to December 1, 2013. The results of this study were as follows: First, traditional transformation was mostly used among the traditional expression methods. But, there was not many traditional reinterpretation method. Second, looking at each component, traditional reproduction method mostly used for roof, column and ceiling to emphasize facade. Traditional transformation method can be divided into 3 ways in detail. The first method is mixing materials of modern and traditional, and the second one is transforming traditional material and combining this with modern one. The third is removing traditional material completely and transforming totally into modern materials. Third, traditional high quality noble houses are found in luxurious Korean restaurants and luxurious cafes while common houses are found in local food restaurant and cafes. It is because traditional common houses are still considered as low quality of design and it may prevent common houses from becoming high quality of design.

• KIEAE Journal
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• 제11권1호
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• pp.21-28
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• 2011

The objective of this study is to analysis the properties for reclassifying green roofs into three types by cluster analysis after investigating the present condition in thirty green roofs which were created from 2002 to 2004 by Seoul Metropolitan Government. The previous classification was resulted in structure safety diagnosis in the type of green roofs and visible judgment by experts in sites. However, it should have been corrected. Therefore, it needed a reestablished concept and a reclassification in green roofs. The results of this study are as follows : the concept of a rooftop garden and a green roof is different from previous studies. The rooftop gardens named by intensive green roofs are closed to integrated management, whereas the green roofs are closed to low management. The reclassification of green type was also conducted to use the statistic analysis of categorical regression by previous studies, and the factors extracted by the categorical regression were influenced by greening type. The figure of R-square representing explanation in regression analysis is 95.2%. As this result was analyzed, it was proved into rooftop gardens demanded for high activity by people.

• KIEAE Journal
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• 제13권4호
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• pp.33-41
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• 2013

The impervious area on the surface of urban area has been increased as buildings and artificial land cover have continually been increased. Urban development has gradually decreased the green zone in downtown and alienated the city from the natural environment on outskirt area devastating the natural ecosystem. There arise the environmental problems to urban area including urban heat island phenomenon, urban flood, air pollution and urban desertification. As one of urban plans to solve such problems, green roof system is attracting attentions. The purpose of this study was to investigate flood discharge and heat reduction effect according to the green roof system and to quantify effect by analyzing through simulation water and heat cycle before and after green roof system. For the analysis, Distributed hydrologic model, WEP (Water and Energy transfer Processes) and WEP+ model were used. WEP was developed by Dr. Jia, the Public Works Research Institute in Japan (Jia et al., 2005), which can simulate water and heat cycle of an urban area with complex land uses including calculation of spatial and temporal distributions of water and heat cycle components. The WEP+ is a visualization and analysis system for the WEP model developed by Korea Institute of Construction Technology (KICT).

• 대한환경공학회지
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• 제34권3호
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• pp.168-176
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• 2012

2011년 3월에 대구광역시의 대형유통업소주차장을 대상으로 총 48개의 먼지시료를 채취하여 100 ${\mu}m$ 이하로 걸러서 산추출한 후 ICP로 14개 원소를 분석하였다. 미량원소성분 중 Ca, Fe, K, Mg, Mn, Na, V는 자연적 발생원의 영향을, 그리고 Cd, Cr, Cu, Ni, Pb, Zn은 인위적 발생원의 영향을 받는 것으로 추정된다. 미량원소성분의 농도는 자연적 발생원 성분이 인위적 발생원 성분보다 뚜렷하게 높았고, 인위적 발생원 성분은 지상옥상이 지상실내와 지하실내보다 농도가 높았다. 미량원소성분의 조성백분율은 인위적 발생원 성분에 비해 자연적 발생원 성분이 대부분을 차지하였고, 인위적 발생원 성분은 지상옥상이 지상실내와 지하실내보다 함유율이 높았다. 주차장은 유해중금속오염이 거의 없는 수준을 보였고, 지상옥상은 지상실내와 지하실내보다 중금속오염도가 높았다. 미량원소성분간의 상관성은 지상옥상이 지상실내와 지하실내보다 양호한 상관성이 많았고, 인위적 발생원 성분은 주차장연수와 주차밀도와도 상관성이 양호하였다.

• 한국조경학회지
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• 제42권6호
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• pp.10-20
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• 2014

오늘날 옥상공간은 대부분 휴식과 같은 이용을 목적으로 조성되고 있다. 하지만, 이러한 옥상공간의 이용이 적거나, 유지관리가 소홀하게 되면, 옥상공간이 방치되거나, 용도변경 등의 이유로 조성비용의 낭비를 초래할 수 있어, 이용을 활성화하기 위한 설계가 필요할 것으로 판단하였다. 한편, 국내의 경우, 옥상공간은 비교적 획일적이고 단순하게 조성되어 있다. 하지만, 건물용도에 따라 이용자 특성이 다르기 때문에 옥상공간의 이용행태와 선호도도 다를 것이며, 옥상공간의 이용을 활성화하기 위해서 이러한 점을 고려할 필요가 있다고 보았다. 이에 본 연구에서는 4개의 건물용도(공공건물, 교육연구건물, 의료건물, 판매건물)를 선정하여 연구대상지의 이용경험자를 대상으로 설문조사를 실시하였으며, 옥상공간의 이용행태와 선호도를 건물용도별로 비교분석하였다. 이때, 교차분석, 다중응답분석, 신뢰도분석, 일원배치 분산분석을 하였으며, 그 결과는 다음과 같다. 먼저 옥상공간의 이용행태에서 이용목적, 이용동기, 이용빈도, 평균체류시간이 건물용도별로 차이가 있는 것으로 나타났다. 특히, 이용목적의 경우, 모든 건물에서는 휴식을 위해서 옥상공간을 가장 많이 이용하는 것으로 나타났다. 한편, 공공건물에서는 대화와 흡연을, 교육연구건물에서는 흡연, 산책 및 스트레칭, 외부경관감상을, 의료건물에서는 산책 및 스트레칭과 대화를, 판매건물에서는 아이 돌보기와 대화를 목적으로 옥상공간을 많이 이용하는 것으로 나타났다. 또한, 옥상공간의 선호도에서도 식물유형, 포장재, 시설물 선호도가 건물용도별로 차이가 있는 것으로 나타났다. 특히, 식물유형의 경우, 공공건물 이용자들은 초본류와 채소류 및 수생식물을, 의료건물 이용자들은 채소류 및 수생식물을, 판매건물 이용자들은 모든 유형의 식물을 다른 용도의 건물 이용자들보다 더 선호하는 것으로 나타났다. 이러한 건물용도별 옥상공간의 이용행태와 선호도 차이를 고려하여 옥상공간을 조성함으로써 이용 활성화에 기여할 수 있을 것으로 기대한다.

• 건축역사연구
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• 제18권4호
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• pp.63-79
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• 2009

Since the 1970's, UNESCO and ICOMOS have adopted or emphasized on the principles of historic preservation. One of them is what to require a repair have not to be repaired beyond the limits of the features and techniques to have been born in those days of establishment. On the premise, this paper is to examine the materials and technique of lime plaster work in order for roof ridge, and for bond paste of stones and bricks in government constructions in the late of Joseon dynasty(17~19c). The result of this examination will come up with a basic conformity in the case of repairing the building established in the late of Joseon dynasty. This paper is carried out for the proper repair and restoration of architectural cultural properties. Construction reports and other documents in those days are examined for the study. Following conclusions have been reached through the study. The components of old plaster mixtures which agglutinate stones each other were quicklime, perilla oil, and paper fiber. The components of old plaster mixtures which point joint of black bricks consisted of slaked lime, perilla oil, paper fiber, and cereal starch. These components were the same as coat surface of roof ridges. In the case of times, one of the following sand, white clay, sap of boiled elm bark was added to these components for the purpose of high efficiency. These materials and techniques which applied to plaster work of those buildings had developed in the process of making royal tombs. But these materials and techniques were quite different from the present.

• 한국태양에너지학회 논문집
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• 제27권3호
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• pp.169-174
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• 2007

Building integrated photovoltaic(BIPV) system operates as a multi-functional building construction material. They not only produce electricity, but also are building integral components such as facade, roof, window and shading device. As PV modules function like building envelope in BIPV, combined thermal and PV performance should be simultaneously evaluated. This study is to establish basic Information for designing effective BIPV by discovering relations between temperature and generation capability through experiment when the PV module is used as roof material for houses. To do so, we established 3kW full scale mock-up model with real size house and attached an PV array by cutting in half. This is to assess temperature influence depending on whether there is a ventilation on the rear side of PV module or not.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2009년도 추계학술발표대회 논문집
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• pp.251-258
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• 2009

Building-Integrated Photovoltaics (BIPV) is a photovoltaic (PV) technology which can be incorporated into the roofs walls of both commercial and domestic buildings to provide a source of electricity. BIPV systems can operate as a multi-functional building components, which generates electricity and serves as part of building envelope. It can be regarded as a new architectural elements, adding to the building's aesthetics. Applying PV modules on roof has an advantage over wall applications as they seem to receive more solar radiation on PV modules. There are various types of PV applications on building roofs: attached, on-top and integrated. This paper describes the classification and characteristics of PV applications on roofs.