• 토지주택연구
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• 제11권1호
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• pp.95-101
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• 2020

In the past few decades, the global population growth and rapid economic development have resulted in significant increases in building energy consumption. To reduce greenhouse-gas emissions and building energy consumption, building materials and energy technologies must be optimized. Building retrofitting is a more efficient method than reconstruction to improve the building energy performance. In order to improve the energy performance of existing buildings, this study proposed energy-efficiency retrofit plans and derived cost-effective retrofit plan. The energy efficient retrofit method is achieved through the packaging of energy technology and the energy and cost reduction effect of the energy efficiency retrofit package are analyzed. As a result of the study, the energy-efficiency retrofit package showed an energy reduction effect of up to 60% or more and a construction cost reduction of about 30%. This study argues that optimal energy and construction cost reduction of existing buildings are possible through the packaging of energy efficiency technology.

• 한국토양비료학회지
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• 제47권6호
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• pp.418-424
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• 2014

The Agricultural Land Remodeling Project was launched for agricultural fields with potential risk of flooding which were placed in low-lying area as a part of agricultural sectors of the National 4 River Project. It induced of the reclaimed agricultural fields on a national scale. The arable lands reestablished by reclamation have caused several big problems such as destruction of soil physicochemical properties, and thus the techniques to solve disadvantages were urgently required. In this study, we collected experimental samples from top soils in three agricultural areas, one from conventional agricultural fields (Hwasun, Jeollanam-do) and the others from reclaimed (remodelled) agricultural fields (Naju, Jeollanam-do and Gumi, Gyeongsangbuk-do), The soil chemistry data were analyzed using statistic tools such as semi-variance and kriging, and differences between natural and reconstructed soils were examined. The score, R (Ao) which indicates a dependence distance between each chemical element, was as follows; 21.8~43.5 (Conventional, Hwasoon), 4.4~70.6 (Remodelled, Naju) and 5.3~43.6 (Remodelled, Gumi). These results suggested that chemical properties of the reclaimed agricultural fields had a huge variation. Moreover, the result of kiriging maps also represented a ununiform pattern in the reclaimed lands. As a result of this study, it is strongly required to build up the soil type-specific management techniques for the reclaimed agricultural lands.

• 한국주거학회논문집
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• 제25권6호
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• pp.133-146
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• 2014

This study aims to analyze the changes of adjacent residential area after the restoration of covered urban streams in seoul. The changes of adjacent residential area after restoration were analyzed by changes of land using, urban structure, individual lot of land and architecture to investigate relationship of the urban stream and residential change. The result as follows: the first one is the change of land use and urban structure in adjacent residential area. This change of infrastructure through stream restoration has transformed land use and urban structure in adjacent residential area. Secondly, there is the changes of the individual lot of land. It seemed that new development by combined lots would be concentrated in stream-side blocks. But, the changes of lots such as combining or dividing lots tend to be concentrated in stream-side, main road and main streets. In stream-side, commercial function of land use has changed to residential one which has restored streams landscape by transformation of lots use without changes of ownership-lots. Finally, there is the change of architecture. It turned out new building in adjacent residential area is similar to general development. However, new building in streamside is related to direction of stream. In addition, remodeling and expansion tend to change in commercial buildings on stream-side bridges of corner lots intensively. As a result, it is related to expectation of architectural activation and improvement of sidewalk environment by stream restoration.

• 한국지진공학회논문집
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• 제23권5호
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• pp.239-248
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• 2019

In this study, the out-of-plane seismic resistance of lightly-reinforced existing walls strengthened with thick RC jacket was investigated. The thick RC jacket with a thickness of 500 mm was placed at one side of the thin existing wall with a thickness of 150 mm. At the interface between the wall and RC jacket, a tee-shaped steel section with a number of anchor bolts and dowel bars was used as the shear connector. To investigate the connection performance and strengthening effects, the cyclic loading tests of four jacketed wall specimens were performed. The tests showed that the flexural strength of the jacketed walls under out-of-plane loading was significantly increased. During the initial behavior, the tee shear connector transferred forces successfully at the interface without slip. However, as the cracking, spalling, and crushing of the concrete increased in the exiting walls, the connection performance at the interface was significantly degraded and, consequently, the strength of the jacketed walls was significantly decreased. The flexural strength of the jacketed walls with tee shear connector was estimated considering the full and partial composite actions of the tee shear connector.

• 한국농촌건축학회논문집
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• 제25권1호
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• pp.9-16
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• 2023

This study is on the formation and the development process of urban space by referring to the literature in Yeosu where is the important location in logistics & transportation and maritime since the Japanese colonial period. There are many factors and results of the development process in Yeosu by the opening port, railroads, loads and industries. The purpose of this study is to understand the characteristics of the formation process of urban space and the characteristics of physical space in Yeosu. The results are as follow; The urban formation and development process in Yeosu where was a small fishing village in the 1910s is largely divided into four processes. Formation: the population increased due to constructions such as of a railroad, a port, and roads and there were many reclamations around the center of the old city center in the Japanese colonial period. Stagnation: There was no urban development due to stagnation, war, and the Yeo-sun Incident. Expand: the industrialization of the Yeocheon Industrial Complex and Gwangyang Steel and other areas around Yeosu led to a surge in Yeosu's population. To cope with this, the city was expanded through three land readjustment projects and the development of large-scale residential complexes. Decline and Remodeling: Yeosu's urban space declined due to the decline of fisheries and the decrease in marine and railway logistics. And the expansion and improvement of the transportation network for hosting the Yeosu World Expo increased the accessibility of the old city center, transforming it into a tourist city using cultural heritage and nature.

• Current Photovoltaic Research
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• 제9권1호
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• pp.11-16
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• 2021

In the past, marine pollution caused by radioactivity and wastewater discharge caused mass destruction. As an alternative, the land farming system became common and operational. In recent years, safety and environmental problems caused by declining population due to aging of fishermen and underdeveloped facilities have always been lurking, so improvement is urgently needed. As part of the new renewable energy 3020 plan announced by the government in 2017, a new model was proposed to improve the environment as well as save energy when the roof of a water tank farm was remodeled into a solar power system. Study, when the existing roof was remodeled and replaced with a water tank farm in Busan as an empirical model, the energy saving rate was analyzed by comparing the actual electricity consumption and power generation.

• 한국건설관리학회논문집
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• 제20권6호
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• pp.132-141
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• 2019

1990년대 한국의 건설 시장은 GDP대비 20%를 상회하며 계속해서 성장해 왔다. 2015년에는 30년 이상의 노후 공동주택이 403만호에 이르렀고, 2019년 현재까지 계속해서 증가하고 있다. 특히 공공임대 주택의 비율은 한국 전체 노후공동주택의 90.6%를 차지한다. 리모델링 및 재건축 등 건설사업의 타당성 검토 전에 활용이 가능한 사업유형 분류기준을 가격영향요인분석과 주택 건설 관련제도의 분석을 통해 체크리스트를 제시하였다. 공공임대주택의 가격영향요인 32개와 주택건설제도 기반 20개 지표를 사례적용 한 결과 대상단지는 재건축사업이 적합한 것으로 판단되었고, 56개 단지에 확대 적용해본결과 22개단지가 리모델링이 적합한 단지로 판단되었다. 본 연구는 국내 임대주택 건설환경과 삶의 질 향상을 위한 노후공동주택 성능향상에 활용가능하고, 특수성을 시사하는 것에 충분한 의미가 있다. 향후 연구에서는 체크리스트의 정량화를 위한 연구가 필요하다.

• 토지주택연구
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• 제14권1호
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• pp.123-134
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• 2023

설계단계에서 작성된 BIM모델은 후속 단계 전환을 통한 사전검토 및 공정관리 등에 활용될 수 있다. 그러나 실제 BIM적용 사례들의 경우 설계단계와 시공단계의 활용 목적성 등의 차이로 인해 설계단계의 모델의 활용이 아닌 시공단계에 적합한 새로운 모델을 작성하는 등 추가 작업이 요구된다. 따라서 본 연구에서는 시공단계에서 재작성 없이 설계단계 BIM모델의 재활용 방안으로 객체 분할을 제안하며, 이를 위해 객체의 기본요소인 정점 데이터를 기반으로 분할 면을 생성하여 객체 분할에 활용하는 방법론을 제시한다. 또한 실제 BIM모델에 적용 및 분할 객체의 4D CAD 시스템 연동과 기존 분할 방법과의 비교를 통해 활용성을 검증한다.

• 토지주택연구
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• 제15권2호
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• pp.9-17
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• 2024

표준건물 에너지모델은 정책, 연구 및 기술개발 등에 다양한 활용성이 있다. 상세 에너지해석용 표준공동주택모델이 서동현 외(2014)에 의해 제안되었으나, 모델의 에너지소비량 예측에 성능 검증용 신뢰성 있는 측정데이터가 없어 충분한 검증이 이루어지지 못하였다. 그러나, 최근 에너지경제연구원(KEEI)에서 매년 발표하는 가구에너지패널조사(HEPS) 데이터를 분석하여 공동주택 벤치마크데이터를 발표한 연구에 힘입어 검증이 가능하게 되었다. 이 연구는 이 검증용 데이터를 이용하여 표준공동주택 에너지모델을 중부지역, 2000년 이전 모델을 기준으로 보정하고, 보정된 모델을 이용하여 지역과 준공년도가 그룹에도 유효한 성능을 보여주는지 검증하였다. 검중에는 중부, 남부 각 5개씩의 대표도시 표준기상데이터가 이용되었고, 18개의 그룹에서 대부분 MBE, cv(RMSE) 기준을 만족하는 결과를 도출하였다.

• 한국지리정보학회지
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• 제18권1호
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• pp.25-47
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• 2015

상업지역 내에 위치한 공원은 이용행태가 일반적인 근린공원과 다를 수 있으며, 인근 상업시설의 영향을 배제할 수 없다. 본 논문은 중심상업지역에 위치한 근린공원을 대상으로 주변 현황과 여건 변화에 의해 나타나는 공원 이용행태의 특성을 규명하여 추후 공원 조성이나 재정비 시 필요한 개선점 및 보완사항을 제시하고자 연구를 수행하였다. 그 결과, 국채보상운동기념공원과 2.28기념 중앙공원은 인근 지역의 지가가 높고 노후화된 건축물이 적은 반면, 경상감영공원 주변 지역은 지가의 하락과 함께 상업시설이 전반적으로 쇠퇴한 것으로 조사되었으며, 이용자의 연령대는 젊은 층보다 노년층이 많이 분포하는 것으로 나타났다. 공원의 이용목적에 있어 세 공원 모두 공원 내 시설을 직접 이용하기보다는 주변 상업시설 이용과 관련된 간접적인 형태가 많았으며, 공원이용자의 계층적 특성이 주변 상업시설 이용자와 유사한 특성을 갖는 것으로 확인되었다. 공원 이용만족도를 결정하는 요인은 각 공원의 특성 및 이용계층의 차이에 따라 다르게 나타났으며, 이에 공원 조성 및 정비에 있어 공원 외부 환경의 변화에 따른 이용계층의 영향을 필히 고려한 계획이 이루어져야 할 것으로 판단된다.