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J C P Cheng, J Ma

Development of a Decision Support System for LEED for EB Credit Selection Based on Climate Factors

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Series: w78:2014 (browse)
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J Ma, J C P Cheng

Analysis of the Related Credits in LEED Green Building Rating System Using Data Mining Techniques

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Patrick Suermann, Raja R.A. Issa

United States Air Force Milcon Transformation: Building Information Modeling Case Studies

Abstract: The United States Air Force manages approximately $2B of traditional military construction (MILCON) per year in a typical portfolio of 100-150 projects. In Fiscal Year, 2010, the Air Force’s MILCON authority having jurisdiction, the Air Force Center for Engineering and the Environment (AFCEE) revised its standard design instruction to supplement how it managed and directed MILCON. One of the primary differences was a requirement for all vertical construction to be designed through a Building Information Modeling (BIM) approach. There were two pilot projects to assess Air Force BIM implementation. First, one project case study explored impact on typical MILCON project management practices. The HQ CENTCOM facility implemented a BIM-based approach on a standard design-bid-build project at MacDill Air Force Base, FL. A second project case study explored cutting edge research methodologies that used the BIM for facility optimization on a LEED-platinum facility. Specifically, the Tyndall Air Force Base Fitness Center targeted energy efficiency. The facility’s Electronic Management Control System (EMCS) monitored pure consumption, solar photovoltaic (PV) power meter pulse output, and solar hot water recovery systems using Digital Energy Monitors (DEM) tied to the BIM via an exported database file via the EMCS server. Lastly, AFCEE partnered with Onuma to manage and leverage their new BIM-based designs to afford greater collaboration from inception onward for USAF facilities worldwide. This research investigates owners’ lessons learned and designers’ experiences related with the initiative under MILCON Transformation, as well as the implications for shaping future USAF MILCON management and design optimization.

Keywords: Air Force, MILCON, BIM, Prototype, Collaboration, Control Systems

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Full text: content.pdf (634,937 bytes) (available to registered users only)

Series: w78:2010 (browse)
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R Kenley, T Harfield

Greening procurement of infrastructure construction: optimising mass-haul operations to reduce greenhouse gas emissions

Abstract: The construction industry has made significant progress towards construction processes for sustainable buildings through programs and guidelines such as ISO 14000 and LEED. However, the lack of research into greenhouse gas production resulting from processes during construction constitutes a significant gap in our knowledge. Linear infrastructure construction processes were examined to find a major contributor of greenhouse gas emissions. One micro-process, earthworks materials handling (commonly known as mass-haul), has been identified. The challenge is to define and develop sustainability measures, methodologies and tools for mass-haul that takes place during linear infrastructure construction. ICT tools and construction management programs such as DynaRoad do provide continuing updates of construction progress. These data can be utilised in mathematical optimisation techniques focusing on scheduling activities, objects or locations of mass haul. The expected outcome of the research is proof of concept for the utilisation of optimisation and modelling techniques to devise measurement tools and methodologies for greenhouse gas emissions of mass-haul during infrastructure construction. Verification of the concept is expected to be through the application of e-government procurement protocols based on total mass-haul activities for tendered projects. These can then be assessed against environmental factors linked to greenhouse gas emission rates in other domains, thus extending sustainability practices during infrastructure construction.

Keywords: procurement, optimizing mass-haul, sustainable construction methodologies

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Series: w78:2011 (browse)
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Wei Wu, Raja R. A. Issa

Application of VDC in Leed Projects: Framework and Implementation Strategy

Abstract: Virtual Design and Construction (VDC) generates multifaceted benefits in the Architectural, Engineering and Construction (AEC) industry. Stakeholders can achieve optimal balance between building performance and costs with use of integrated, multidisciplinary, virtual building models. The VDC models provide the project team with valid and reliable sources to achieve project goals in a heterogeneous industry environment. This paper investigates the application of VDC in complex and high performance building projects, such as LEED projects. As a new business paradigm, LEED has attracted substantial investment in the North American building market. Owners, architects, engineers, and contractors are all striving to embark on the LEED certification but oftentimes, they find the process confusing and cumbersome. The contributing factors are various but the technological and financial challenges are obvious. LEED certified buildings are expected to have superior building performance to conventional buildings in various aspects, i.e. energy efficiency, water conservation, and indoor environmental quality, etc. It is believed that application of VDC could help achieve compliance with the LEED criteria, and contribute to leveraging the LEED project delivery. The theoretical framework of such application is researched and proposed. Implementation strategies are delineated and recommendations are given to the AEC professionals to encourage adoption of VDC in future projects.

Keywords: VDC, BIM, LEED, integration framework

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Full text: content.pdf (156,535 bytes) (available to registered users only)

Series: w78:2010 (browse)
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Wu W,Issa R

Integrated process mapping for bim implemenation in green building project delivery

Abstract: Professionals in the architecture, engineering and construction (AEC) industry are becoming more versed with building information modeling (BIM), and start to recognize its synergy with green building. As more owners are demanding better building performance to meet regulatory requirements, business goals or to establish a positive public image, implementing BIM in green building project delivery offers project teams the ideal leverage to meet owners expectations. Current Green BIM practices are immature, ad-hoc and unsystematic. The lack of an integrated process is the biggest barrier to exploring the benefits of Green BIM to their full extent. The fact that most project teams are transient in nature also makes it challenging to replicate success from one project to another. Other major obstacles reside in understanding the subtleties in differentiating the roles and responsibilities of team members, determining appropriate BIM execution strategies and standardizing information exchange (IE). Hence, the purpose of this research is to conduct a comprehensive review of existing Green BIM strategies and best practices, and to develop an Integrated Green BIM Process Map (IGBPM) to provide guidance on BIM implementation in green building project delivery. The deliverables of this research include a customized worksheet for project sustainability goals and BIM use identification, Level 1 of the IGBPM and several examples of the Level 2 process maps using LEED as a use case. The IGBPM is valuable to industry practitioners since it represents a holistic and systematic approach to efficiently utilize limited BIM resources to overcome the challenges and complexities to successfully delivering the project and achieving the targeted green certification. The structural transparency of the IGBPM also encourages risk/benefit sharing that can help enhance collaboration among team members and eventually facilitate a more integrated delivery of green building projects.

Keywords: Building information modeling,green building,process mapping,project delivery

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Series: convr:2013 (browse)
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