• 제목/요약/키워드: Building retrofit

검색결과 189건 처리시간 0.023초

The Effectiveness of New Power Generation and Energy Demand Reduction to Achieve Greenhouse Gas Reduction Goals in Building Area

  • Park, Seong-Cheol;Kim, Hwan-Yong;Song, Young-Hak
    • Architectural research
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    • 제18권2호
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    • pp.59-64
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    • 2016
  • Since the massive power outages that hit across the nation in September 2011, a growing imbalance between energy supply and demand has led to a severe backup power shortage. To overcome the energy crisis which is annually repeated, a policy change for deriving energy supply from renewable energy sources and a demand reduction strategy has become essential. Buildings account for 18% of total energy consumption and have great potential for energy efficiency improvements; it is an area considered to be a highly effective target for reducing energy demand by improving buildings' energy efficiency. In this regard, retrofitting buildings to promoting environmental conservation and energy reduction through the reuse of existing buildings can be very effective and essential for reducing maintenance costs and increasing economic output through energy savings. In this study, we compared the energy reduction efficiency of national power energy consumption by unit production volume based on thermal power generation, renewable energy power generation, and initial and operating costs for a building retrofit. The unit production was found to be 13,181GWh/trillion won for bituminous coal-fired power generation, and 5,395GWh/trillion won for LNG power generation, implying that LNG power generation seemed to be disadvantageous in terms of unit production compared to bituminous coal-fired power generation, which was attributable to a difference in unit production price. The unit production from green retrofitting increased to 38,121GWh/trillion won due to the reduced energy consumption and benefits of greenhouse gas reduction costs. Renewable energy producing no greenhouse gas emissions during power generation and showed the highest unit production of 75,638GWh/trillion won, about 5.74 times more effective than bituminous coal-fired power generation.

BIM and Thermographic Sensing: Reflecting the As-is Building Condition in Energy Analysis

  • Ham, Youngjib;Golparvar-Fard, Mani
    • Journal of Construction Engineering and Project Management
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    • 제5권4호
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    • pp.16-22
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    • 2015
  • This paper presents an automated computer vision-based system to update BIM data by leveraging multi-modal visual data collected from existing buildings under inspection. Currently, visual inspections are conducted for building envelopes or mechanical systems, and auditors analyze energy-related contextual information to examine if their performance is maintained as expected by the design. By translating 3D surface thermal profiles into energy performance metrics such as actual R-values at point-level and by mapping such properties to the associated BIM elements using XML Document Object Model (DOM), the proposed method shortens the energy performance modeling gap between the architectural information in the as-designed BIM and the as-is building condition, which improve the reliability of building energy analysis. Several case studies were conducted to experimentally evaluate their impact on BIM-based energy analysis to calculate energy load. The experimental results on existing buildings show that (1) the point-level thermography-based thermal resistance measurement can be automatically matched with the associated BIM elements; and (2) their corresponding thermal properties are automatically updated in gbXML schema. This paper provides practitioners with insight to uncover the fundamentals of how multi-modal visual data can be used to improve the accuracy of building energy modeling for retrofit analysis. Open research challenges and lessons learned from real-world case studies are discussed in detail.

Updating BIM: Reflecting Thermographic Sensing in BIM-based Building Energy Analysis

  • Ham, Youngjib;Golparvar-Fard, Mani
    • 국제학술발표논문집
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    • The 6th International Conference on Construction Engineering and Project Management
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    • pp.532-536
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    • 2015
  • This paper presents an automated computer vision-based system to update BIM data by leveraging multi-modal visual data collected from existing buildings under inspection. Currently, visual inspections are conducted for building envelopes or mechanical systems, and auditors analyze energy-related contextual information to examine if their performance is maintained as expected by the design. By translating 3D surface thermal profiles into energy performance metrics such as actual R-values at point-level and by mapping such properties to the associated BIM elements using XML Document Object Model (DOM), the proposed method shortens the energy performance modeling gap between the architectural information in the as-designed BIM and the as-is building condition, which improve the reliability of building energy analysis. The experimental results on existing buildings show that (1) the point-level thermography-based thermal resistance measurement can be automatically matched with the associated BIM elements; and (2) their corresponding thermal properties are automatically updated in gbXML schema. This paper provides practitioners with insight to uncover the fundamentals of how multi-modal visual data can be used to improve the accuracy of building energy modeling for retrofit analysis. Open research challenges and lessons learned from real-world case studies are discussed in detail.

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원격 데이터서비스(RDS)를 이용한 건축설비 리모델링 핵심요소 기술의 DB 구축에 관한 연구 (A Study on the Development of Information Database for Building Energy Retrofit using Remote Data Service (RDS) Technology)

  • 정광섭
    • 설비공학논문집
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    • 제15권12호
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    • pp.1060-1069
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    • 2003
  • Our society becomes complex because technology is developing quickly. Especially, building services field deals with the important information that produces a drawing and manages the planning information and manpower. Therefore, the efficient management that connected with the construction information plays the important roles. The study develops a database by organizing systematically the various types of information using hypermedia. And, this study is to build the management system that can serve the various information that operated by DBMS on the web according to the DB structure. The information database was developed using internet web technology for building services field.

마찰형 감쇠기가 설치된 다자유도 비선형 건물의 응답특성 (Response Characteristics of a Nonlinear MDOF Structure with Friction Dampers)

  • 이성경;박지훈;문병욱;민경원;이상현
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2007년도 춘계학술대회논문집
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    • pp.561-567
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    • 2007
  • This paper deals with the numerical model of a bracing-friction damper system and its deployment using the optimal slip load distribution for the seismic retrofitting of a damaged building. The Slotted Bolted Connection (SBC) type friction damper system was tested to investigate its energy dissipation characteristic. Test results coincided with the numerical ones using the conventional model of a bracing-friction damper system. The placement of this device was numerically explored to apply it to the assumed damaged-building and to evaluate its efficiency. It was found by distributing the slip load that minimizes the given performance indicies based on structural response. Numerical results for the damaged building retrofitted with this slip load distribution showed that the seismic design of the bracing-friction damper system under consideration is effective for the structural response reduction.

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반복하중을 받는 철근콘크리트 골조 및 보강시스템의 내진성능 평가 및 개선 (Improvement and Evaluation for Seismic Resistant Capacity of Reinforced Concrete Frame and Braced System under Load Reversals)

  • 김광연;하기주;신종학;이상목;이영범;조용태
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2000년도 가을 학술발표회논문집(I)
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    • pp.109-114
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    • 2000
  • Recently, it is required to improve the structural performance, such as durability and earthquake resistant capacity due to the deterioration of structural components in the existing reinforced concrete building with the old aging and transition of design code. Therefore, the new technology should be developed, such as seismic retrofit and improvement of structural performance in the existing reinforced concrete building. This analytical study was performed to verify the effects of basic and reinforcing system in the reinforced concrete building. The analytical results by nonlinear finite element method were compared with the experimental results and the comparisons are judged to be good.

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리모델링 건축물을 위한 변위증폭형 제진시스템 개발 (Development of Displacement Amplification Damping System for the Remodeling Buildings)

  • 박영미;김혜원;박기홍
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2016년도 추계 학술논문 발표대회
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    • pp.11-12
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    • 2016
  • Buildings which was constructed before 1988 were not satisfied seismic design code. Thus, most of these buildings have to retrofit for remodeling. This study proposed the steel slit damper system with displacement-amplification device. It could maximize the effectiveness of a damper system in controlling seismic response of a building by amplifying story drift induced to damper. In this study, the proposed system was verified the effect of displacement-amplification using the analytical and experimental study. From the analysis and experiment, it was found that the propsed damping system showed a stable hysteric behavior with excellent energy dissipation capacity. Therefore the proposed system will make a good seismic performance and economical benefits.

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용도쇠퇴 도축장건물의 기능전환 재활용 사례 연구 (A case on building reuse of slaughterhouse)

  • 윤혜경;이연숙
    • 한국실내디자인학회:학술대회논문집
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    • 한국실내디자인학회 2008년도 춘계학술발표대회 논문집
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    • pp.63-66
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    • 2008
  • In urban planning and architecture, there has been emerging paradigm of regeneration, taking place of demolishing first, and new development next principle. Retrofit and remodeling, thereby, became important. The purpose of the research in to examine a reused space with new function. The target space was the former slaughterhouse in the ailing district of the Bologna City with ever increasing vandalism and fear caused by empty buildings, which was regenerated into a culturally affluent area, such as cultural facilities including cinema, gallery, art school cluster along with elderly club and child care center nearby. Through this regeneration, more affluent life opportunity was provided for citizens and local residents. This case study shows how old the building and interior space have been transformed to accommodate contemporary needs, while preserving historical features.

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Application of meta-model based parameter identification of a seismically retrofitted reinforced concrete building

  • Yu, Eunjong
    • Computers and Concrete
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    • 제21권4호
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    • pp.441-449
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    • 2018
  • FE models for complex or large-scaled structures that need detailed modeling of structural components are usually constructed using commercial analysis softwares. Updating of such FE model by conventional sensitivity-based methods is difficult since repeated computation for perturbed parameters and manual calculations are needed to obtain sensitivity matrix in each iteration. In this study, an FE model updating procedure avoiding such difficulties by using response surface (RS) method and a Pareto-based multiobjective optimization (MOO) was formulated and applied to FE models constructed with a commercial analysis package. The test building is a low-rise reinforced concrete building that has been seismically retrofitted. Dynamic properties of the building were extracted from vibration tests performed before and after the seismic retrofits, respectively. The elastic modulus of concrete and masonry, and spring constants for the expansion joint were updated. Two RS functions representing the errors in the natural frequencies and mode shape, respectively, were obtained and used as the objective functions for MOO. Among the Pareto solutions, the best compromise solution was determined using the TOPSIS (Technique for Order of Preference by Similarity to Ideal Solution) procedure. A similar task was performed for retrofitted building by taking the updating parameters as the stiffness of modified or added members. Obtained parameters of the existing building were reasonably comparable with the current code provisions. However, the stiffness of added concrete shear walls and steel section jacketed members were considerably lower than expectation. Such low values are seemingly because the bond between new and existing concrete was not as good as the monolithically casted members, even though they were connected by the anchoring bars.

기존말뚝과 보강말뚝의 하중분담 특성에 관한 실험적 연구 (Experimental Study for Load Distribution Characteristics of Existing and Reinforcing Piles)

  • 조성훈;최기선;조삼덕;유영찬;최창호
    • 한국지반환경공학회 논문집
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    • 제15권12호
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    • pp.87-95
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    • 2014
  • 최근 공동주택 수직증축 리모델링 사업 등 기초구조물을 보강하기 위한 기술적 수요가 증가하고 있다. 본 논문에서는 기존 구조물을 지지하는 기존말뚝에 보강말뚝을 추가로 설치할 경우 추가하중에 의한 기존말뚝과 보강말뚝의 하중분담 특성을 연구하였다. 정사각형의 기초판에 설치된 기존말뚝 4본에 허용하중을 재하한 후, 기초판 중앙에 보강말뚝 1본을 추가로 설치하고 추가하중을 재하하였다. 실험결과로부터 기존말뚝에 재하되는 하중이 허용지지력을 초과한 이후에 기존말뚝과 보강말뚝이 하중을 균등하게 분담하는 것으로 분석되었다. 기존말뚝에 허용하중 재하 후, 허용하중 대비 60 %, 80 %, 100 %까지 제하(unloading)하고, 보강말뚝을 설치한 후 추가하중을 재재하(reloading)하는 실험을 수행하였다. 연구 결과 제하 하중의 양이 증가함에 따라 재재하 시 기존말뚝과 보강말뚝이 하중을 균등하게 분담하는 재재하 하중이 감소하는 경향을 파악하였다.