• Title/Summary/Keyword: Sustainable Buildings

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Control of wind-induced motion in high-rise buildings with hybrid TM/MR dampers

  • Aly, Aly Mousaad
    • Wind and Structures
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    • v.21 no.5
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    • pp.565-595
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    • 2015
  • In recent years, high-rise buildings received a renewed interest as a means by which technical and economic advantages can be achieved, especially in areas of high population density. Taller and taller buildings are being built worldwide. These types of buildings present an asset and typically are built not to fail under wind loadings. The increase in a building's height results in increased flexibility, which can lead to significant vibrations, especially at top floors. Such oscillations can magnify the overall loads and can be annoying to the top floors' occupants. This paper shows that increased stiffness in high-rise buildings may not be a feasible solution and may not be used for the design for comfort and serviceability. High-rise buildings are unique, and a vibration control system for a certain building may not be suitable for another. Even for the same building, its behavior in the two lateral directions can be different. For this reason, the current study addresses the application of hybrid tuned mass and magneto-rheological (TM/MR) dampers that can work for such types of buildings. The proposed control scheme shows its effectiveness in reducing floors' accelerations for both comfort and serviceability concerns. Also, a dissipative analysis carried out shows that the MR dampers are working within the possible range of optimum performance. In addition, the design loads are dramatically reduced, creating more resilient and sustainable buildings. The purpose of this paper is to stimulate, shape, and communicate ideas for emerging control technologies that are essential for solving wind related problems in high-rise buildings, with the objective to build the more resilient and sustainable infrastructure and to optimally retrofit existing structures.

Options for sustainable earthquake-resistant design of concrete and steel buildings

  • Gilmore, Amador Teran
    • Earthquakes and Structures
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    • v.3 no.6
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    • pp.783-804
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    • 2012
  • Because of its large contribution to the environmental instability of the planet, the building industry will soon be subjected to a worldwide scrutiny. As a consequence, all professionals involved in the building industry will need to create a professional media in which their daily work adequately solves the technical issues involved in the conception, design and construction of concrete and steel buildings, and simultaneously convey care for the environment. This paper discusses, from the point of view of a structural engineer involved in earthquake-resistant design, some of the measures that can be taken to promote the consolidation of a building industry that is capable of actively contributing to the sustainable development of the world.

A Study on Realization Method of Low Carbon School Building (저 탄소 학교건축물 구현 방안에 관한 연구)

  • Tae, Sung-Ho;Cho, Young-Sang;Shin, Sung-Woo;Lee, Seung-Min;Meang, Joon-Ho
    • The Journal of Sustainable Design and Educational Environment Research
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    • v.9 no.2
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    • pp.30-37
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    • 2010
  • This study purposed realization and a phase reduction of school building $CO_2$ emissions. Accordingly selected standard school buildings and evaluated life cycle environmental load($CO_2$). This study proposed Green building technology which separated design sector, energy sector, afforestation sector for carbon-neutral city school buildings realization of M-city. As a result, elementary, middle and high schools of M-city built in the year 2013 were required that design sector was Energy Performance Index(EPI) 75 point and energy sector was solar installations more than 25% of the power usage, Solar systems installed more than 10% of total gas consumption and the area of afforesting more than 35% of the ecological area to achieve 30% $CO_2$ reduction compared to the Respectively standard school buildings.

Designing High Performance MEP Systems for Supertall Buildings: A Review of Challenges and Opportunities

  • Burton, Craig
    • International Journal of High-Rise Buildings
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    • v.6 no.4
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    • pp.301-306
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    • 2017
  • The design and construction of supertall buildings has grown dramatically in recent years. This area of practice has traditionally fallen within the purview of a very small group of architects and engineers, but this is rapidly changing, as unprecedented growth and densification has spread to markets not traditionally known for high rise construction. The design community has been increasingly committed to the adoption of green and sustainable design, and the integration of smarter, cleaner technologies across the building spectrum. This paper examines current supertall design trends, and suggests that recently completed and planned projects are trending towards more sustainable solutions, and that a unique set of best practices are emerging specific to Supertalls.

Application of Lightself to Buildings as a Integrated Daylighting System (건축물 일체형으로서 광선반형 자연채광시스템의 건축물 적용기법에 관한 연구)

  • Kim, Jeong-Tai;Chung, Yu-Gun
    • KIEAE Journal
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    • v.2 no.3
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    • pp.17-24
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    • 2002
  • For sustainable building design, using day lighting is considered a variable technique to save energy and create comfort indoor environments. Specially, the lightself as a integrated daylighting system is one of the most important techniques due to it's durability, availability and lighting performance. This paper aims to analyze the development and architectural application of a lightself system to buildings as a integrated day lighting system. For the study, advanced lightself systems developed in abroad such as "Integrated Enveloped and Lighting System", "Anidolic Daylighting System" and etc. are analyzed. Also, the architectural examples are investigated. As results, the new technologies such as optically treated reflective and sun-tracking are adopted to improve daylight performance. And, lots of environmentally friendly buildings are installed on integrated lightself system.

THE FINANCING MODEL FOR GREEN BUILDING PROJECTS WITH THE GOVERNMENTAL GUARANTEE BASED ON CER (Certified Emission Reduction)

  • Sang-Hyo Lee;Se-Woong Jang;Ju-Hyung Kim;Jae-Jun Kim
    • International conference on construction engineering and project management
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    • 2011.02a
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    • pp.368-375
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    • 2011
  • Along with the growing interest in greenhouse gas reduction, the effect of energy reduction from green buildings is gaining interest as well. However, green buildings may have difficulties in financing due to their high initial construction costs. With this in mind, the objective of this study is to suggest a financing model for green building projects with a governmental guarantee based on CER (Certified Emission Reduction). In other words, in the financing model, the government provides a guarantee for the increased costs of a green building project in return for CER. The suggested financing model was tested and found feasible for implementing green building projects. In addition, the model in this study is applicable to private projects because guarantee has its return. To utilize CER as a return for a financial guarantee, however, certification of CDMs (Clean Development Mechanism) for green buildings must be vitalized.

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Developing a BIM-Based Methodology Framework for Sustainability Analysis of Low Carbon High-Rise Buildings

  • Gan, Vincent J.L.;Li, Nan;Tse, K.T.;Chan, C.M.;Lo, Irene M.C.;Cheng, Jack C.P.
    • International conference on construction engineering and project management
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    • 2017.10a
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    • pp.14-23
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    • 2017
  • In high-density high-rise cities such as Hong Kong, buildings account for nearly 90% of energy consumption and 61% of carbon emissions. Therefore, it is important to study the design of buildings, especially high-rise buildings, to achieve lower carbon emissions in the city. The carbon emissions of a building consist of embodied carbon from the production of construction materials and operational carbon from energy consumption during daily operation (e.g., air-conditioning and lighting). An integrated analysis of both types of carbon emissions can strengthen the design of low carbon buildings, but most of the previous studies concentrated mainly on either embodied or operational carbon. Therefore, the primary objective of this study is to develop a holistic methodology framework considering both embodied and operational carbon, in order to enhance the sustainable design of low carbon high-rise buildings. The framework will be based on the building information modeling (BIM) technology because BIM can be integrated with simulation systems and digital models of different disciplines, thereby enabling a holistic design and assessment of low carbon buildings. Structural analysis program is first coupled with BIM to validate the structural performance of a building design. The amounts of construction materials and embodied carbon are then quantified by a BIM-based program using the Dynamo programming interface. Operational carbon is quantified by energy simulation software based on the green building extensible Markup Language (gbXML) file from BIM. Computational fluid dynamics (CFD) will be applied to analyze the ambient wind effect on indoor temperature and operational carbon. The BIM-based framework serves as a decision support tool to compare and explore more environmentally-sustainable design options to help reduce the carbon emissions in buildings.

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Understanding College Students' Perception of Green Building Products

  • Jung, Younghan;Jeong, Myung Goo;Considine, Carol
    • International conference on construction engineering and project management
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    • 2015.10a
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    • pp.503-507
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    • 2015
  • Sustainability continues to gain traction in all industry sectors as people become aware of the advantages of green products. The voluntary use of green products in buildings in the United States continues to grow due to long-term cost saving and the ecological benefit to nature. The voluntary installation of green products is associated with end-users' expectations and perceptions including cost saving, sustainable behavior, and social responsibility. Although involuntary use of green products has similar expectations and perceptions, the installation decision is not based on the goodwill from end-users. This paper surveys college students to capture current experience levels, expectations, and perceptions in regard to green products and/or sustainability and to understand their attitudes about involuntary use of a green product. The installation of low water pressure showerheads in a dormitory provides data to support perception, expectation, and future direction of adoption of green products in public buildings. This information may be used to facilitate sustainable behaviors among involuntary groups regarding to the adoption of green products. The primary objective of this paper is to investigate the college students' perception of a green product, particularly when the students are involuntarily exposed to the green products. As a secondary objective, the paper also attempts to address the college students' general understanding on sustainability and green products. The findings of this study could support the growing importance of sustainable behavior among higher education beyond social responsibility and provide a benchmark against which to improve future change while fostering sustainable behaviors over time among the public.

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A Basic Study on Construction Costs Comparison between LEED and non-LEED Certified Educational Buildings (교육시설물의 LEED 인증유무에 따른 공사비 비교를 위한 기초연구)

  • Ha, SunGeun;Jang, JunHo;Kim, JiMyong;Son, Kiyoung
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2017.05a
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    • pp.262-263
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    • 2017
  • Currently, the environmental certification such as BREEAM and LEED has been improved for the sustainable development and related research is conducted continuously. Especially, in the respect of economy, it is reported that the construction costs of the certified buildings are more increased than non-certified buildings. However, the report has not focused on the educational building but the residential and commercial buildings. Therefore, the objective of this study is to analyze the difference of construction costs between LEED and Non-LEED educational buildings. To achieve the objective, the buildings data are collected in 21 universities then T-test is used for examining the construction costs. As a result, it shows that the construction costs of LEED buildings are increased by 3.8% comparing with non-LEED buildings.

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A Study on Environment-friendliness in Tokyo Regional Hospitals - Focused on the Sustainable Site and Transportation (일본 도쿄 지역 병원의 친환경성 분석 연구 - 토지이용 및 교통부분을 중심으로)

  • Lim, Yeonghwan
    • Journal of The Korea Institute of Healthcare Architecture
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    • v.21 no.3
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    • pp.57-67
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    • 2015
  • Purpose: As the concerns for the environment are gradually prioritized, increasing interests of environment-friendly buildings are drawn. Numerous researches about healthcare buildings have been performed however, they were mainly focused on convenience or healing condition for medical treatments. The hospitals consume energy and generate $CO_2$ as twice as the residential or commercial buildings do. Various green building certification systems are globally arranged. But, it isn't easy to find certification criteria for the green hospital besides the US and UK's ones which are specially designed to evaluate environment-friendly medical buildings(Lim&Yoo, 2010). Methods: In this study, we investigates current conditions of Tokyo Regional hospitals in environment-friendly standpoint and also investigates the foreign certification criteria and systems for the green healthcare building and finds the possibility to apply them to Korean one. Results: Through this study, we found that the Tokyo regional hospitals can be environmentally improved by management plans and programs. Implications: Based on this analysis, Korean Green Building Certification for healthcare facilities will be developed in near future.