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Amor R, Faraj I

Misconceptions About Integrated Project Databases

Abstract: The notion of an integrated project database (IPDB) has existed for decades. Over that time many projects have been undertaken to develop the technologies and frameworks required to implement an IPDB. Also over that time, there has been promotion of the benefits and impacts that IPDB systems will have on the industry. As there are still no industrially stable IPDB systems in existence, the industry's perception of what they are and what they can do has diverged from many of the original presentations. It is also clear that researchers and de-velopers involved in IPDB development have many different ideas about what constitutes an IPDB and what is, or is not, possible to create. This paper aims to describe misconceptions which are growing up around IPDB systems, and presents the authors' view of reality (informed by the opinions of the UK network of experts in ob-jects and integration (URL-1 1999) which was run by the DETR).

Keywords: integrated project database, misconception

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Full text: http://www.itcon.org/2001/5 (available to registered users only)

Series: itcon:2001 (browse)
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Avani Goyal, Ahmet Kilinc, Minkyung Kang and Burcu Akinci

Energy Efficient Improvements to the Envelope of Low-Income Housing: A Case Study of Habitat for Humanity Homes

Abstract: Low-income families pay substantial portions of their total expenditure on household energy bills, making them vulnerable to rising energy costs. Habitat for Humanity houses are built for low-income families and made affordable with volunteer work and construction material donations. Hence, the trade-off between the homesÕ initial construction costs and their life-time energy costs must be evaluated carefully. This paper targets to support better-informed decisions that balance the affordability of certain construction materials with their potential for energy efficiency. In collaboration with Habitat for Humanity of Westchester, we created an energy simulation model of an existing low-income house and calculated the homeÕs annual energy usage with different design alternatives for windows and walls. The resulting estimated annual energy savings are then evaluated alongside their initial investment costs, which were retrieved from RS Means standard construction cost data and quotations from industry. The results show that it is possible to reduce the energy cost of these houses without significantly increasing the construction costs through exploration of different wall and window options. While specific enclosure suggestions apply to this case-study, the utilized approach on exploring different options to identify opportunities to save energy can be used to understand impact on the lives of low-income families.

Keywords: Low-Income Housing, Energy Efficiency, Cost Analysis, Residential Housing, Habitat for Humanity

DOI: https://doi.org/10.24928/JC3-2017/0067

Full text: content.pdf (994,077 bytes) (available to registered users only)

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Bloomfield D, Amor R

I-SEEC: an internet gateway to european construction resources

Abstract: For the construction industries to move into the knowledge society and knowledge economy they need to be able to build upon their existing information base. This information base is unique within individual countries (though often with significant overlap between countries, for example, with Eurocodes utilised across Europe) and usually widely dispersed. Drawing together the information resources within nations, and then connecting them with each other to form trans-national resources enables a more effective, informed and intelligent industry. I-SEEC is a collaborative project funded by the European Union with the overall goal of creating an infrastructure to enable and link high quality commercial electronic information services throughout its member countries. This project started in March 2000 and finishes in April 2001. It builds upon a previous EU project - CONNET (CONstruction information service NETwork). This paper provides a description of the final state of the infrastructure, services and business models available through I-SEEC. The countries participating in I-SEEC are Finland, Iceland, Italy, the Netherlands, Slovenia, Spain and the United Kingdom. CONNET provides access to a range of high quality Internet-based services for the construction industry in Europe. It provides both a European entry point to identify resources and national entry points for localised service delivery. The European CONNET entry point provides a range of technology park services as well as industry-specific services. These services include: · Management of security services, including installation and monitoring of security systems · Help desk, providing a point of contact for potential service providers and for problem resolution · Information broker role, enabling transparent access to information in the CONNET services · Technology observatory service, including leading edge, current and best-practice technologies · Provision of user profiles, allowing personalised delivery of updates in areas of interest · Multi-classification support, permitting handling of national systems used across the EC. · Inter-service communication services, allowing all comparable services to be identified and a query to be passed from one service to another service to answer. · Multi-language support, enabling EC languages to be handled correctly and to provide basic translations between them. The services offered by I-SEEC include a Technical Information Centre, Waste Exchange Centre, Electronic News Service, Calculation and Software Centre, Who's Who in Construction, Specialist Equipment Directory and a Best Practice Information service. The CONNET infrastructure and the I-SEEC information services provide the means to promote effective use of information by construction industry professionals in an efficient and cost-effective way. The ability to pass queries from one high quality service to another in a different country is a substantial contribution to the CIB goal of providing information to achieve performance. This paper draws out lessons learned - both technological and practical - in the course of this multi-country initiative to develop a portal for the construction industry. It also invites participation in this open initiative and describes how existing and developing services across the world can be made interoperable within a CONNET (and any Internet portal) environment.

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Full text: content.pdf (416,345 bytes) (available to registered users only)

Series: w78:2001 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.economic (0.056731) class.deployment (0.046867) class.collaboration (0.041581)
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Permission to reproduce these documents have been graciously provided by CSIR Building and Construction Technology. The assistance of the editors, Mr. Gustav Coetzee and Mr. Frances Boshoff, is gratefully appreciated.


C Mastrodonato, A Cavallaro, M Hannus, J Nummelin, N Jung

ICt for Energy Efficienct buildings: proposed approach for a stakeholders-based strategic roadmap

Abstract: ICT4E2B Forum project aims to bring together all relevant stakeholders involved in ICT systems and solutions for Energy Efficiency in Buildings. Moreover the project has the objective of identifying and reviewing the needs in terms of research and systems integration as well as at accelerating implementation and take-up. ICT4E2B Forum bases its roadmapping activities on the outputs of REEB project that has already developed a high-level roadmap on ICT for Energy Efficient Buildings. Starting from this expert-based work, ICT4E2B Forum intends to promote, through community building activities, a better understanding, a closer dialogue and a more active cooperation between researchers, end-users/practitioners, building owners, technology-suppliers, and software. The exploitation of ICT is consider the adding value in order to support informed decision-making (both human and automated) in the current delivery and in the use of sustainable and energy-efficient buildings and districts. By accomplishing these objectives, ICT4E2B Forum is mapping the sector-specific priorities into a common view and vocabulary, thereby enabling communication and understanding between experts in different sectors that need to join forces in order that fundamental improvements in energy efficient buildings can be achieved. All this coordination work will support in defining future research directions as well as in channelling efforts, while favouring consensus buildings on the roadmap itself.

Keywords: Energy-efficient buildings, ICT4E2B Forum project, REEB project, Strategic Roadmap, Stakeholder-based.

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Full text: content.pdf (174,418 bytes) (available to registered users only)

Series: w78:2011 (browse)
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Castronovo F,Nikolic D,Liu Y,Messner J

An evaluation of immersive virtual reality systems for design reviews

Abstract: With the growth of building information modeling (BIM) approaches to facility design, architectural, engineering, and construction (AEC) industry has been shifting to the use of three-dimensional (3D) virtual facility mockups during design. Studies have shown that 3D models when displayed in an immersive projection display environment allow users to interact with the virtual environment at full scale, and review the designed space in a more intuitive manner. Virtual environments and VR systems however, can vary greatly in levels of immersion and user experience they offer. Thus, for a novice user choosing an appropriate and effective system for specific tasks can be daunting. To understand the benefits of specific VR systems for facility design, this research presents results from conducting design reviews in two immersive display systems. The first system was a fully immersive 5-wall CAVETM environment, while the second was a semi-immersive 3 screen display system. For each design review, the user experience of a reviewing team was documented and analyzed through targeted questionnaires. The large screens, field of view, level of immersion and the overall value of both systems for design reviews were rated consistently high. Furthermore, based on the comments provided by the project team, the fully-immersive system was found to be more appropriate for smaller groups that desire a higher level of immersion. Additionally, the semi-immersive system with a larger footprint was found to be more suitable for larger groups for various use cases. These results aim to guide future users to make an informed decision when selecting an appropriate immersive display system.

Keywords: virtual construction ,virtual reality,design review,immersive projection

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Full text: content.pdf (1,053,845 bytes) (available to registered users only)

Series: convr:2013 (browse)
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Chen S E, Ostwald M J

Design decision support from informed project time-cost performance simulation

Abstract: The time performance of a construction project contributes significantly to overall project costs, The greatest potential for achieving better time and cost performance lies in the design stage of the project. This is when decisions which have the greatest impact on project performance are being made. Designing for the best project time-cost solution involves a strategy of optimising project cost and time variables to find the best combination between these two parameters, such that project time and cost limits are not exceeded. In practice, this optimization strategy will need to take into account the project objectives, the client s needs and limitations for the project, and the way the architect can assimilate relevant information in the design process. The obstacles which have prevented such a strategy being feasible include the separation of the design function from time and cost evaluation functions, and the information technology to provide decision support in a timely and affordable mode. The paper describes the principles of time-cost planning and the conceptual framework for an expert system which can be informed of subjective factors particular to a project and simulate the construction time- cost performance of design alternatives. The feasibility of designing for the optimal time-cost solution with support from this simulation approach is discussed.

Keywords: information technology; time-cost planning; design decision support; expert systems; simulation

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Full text: content.pdf (622,921 bytes) (available to registered users only)

Series: w78:1993 (browse)
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Permission to reproduce these papers has been graciously provided by the National University of Singapore. The assistance of the editors, particularly Prof. Martin Betts, is gratefully appreciated.


Hee-Sung Cha, Kyungrai Kim, Dong-Woo Shin

DEVELOPMENT OF 5D-CAD BASED WORK PROCESS MODEL FOR AGED-HOUSING REVAMP PROJECTS

Abstract: A growing number of aged-housing building projects have become a great concern in Korean building industry nowadays. Until 2010, over 20 year-old housing units are reported to exceed more than one million. The aged-housing units are required to upgrade the performance on both structural and service issues. Compared to new building projects, revamp projects are relatively under developed in terms of construction management. For example, there is few guidance or detailed procedure which addresses the management practice in dealing with revamp projects. Therefore, new technologies are reluctantly implemented in the revamp projects without in-depth analysis on constructability and/or economic efficiency. The objective of this study is to provide a new approach in dealing with aged-housing revamp projects. By developing 5D- CAD based work process model, project managers are effectively informed of various data, i.e., building elements, network scheduling, and cost items. The 5D-CAD based decision making can also enhance the accuracy and promptness during project execution. The authors developed a standardized work process model in dealing with 5D-CAD modeling via Virtual ConstructionTM software. In addition, the model has been implemented to pilot aged-housing project for the purpose of validating the feasibility and applicability in real future projects. The proposed WBS(Work Breakdown Structure) and CBS(Cost Breakdown Structure) have been proved as useful tools for contractors who deal with aged-housing revamp projects under circumstances that there is few historical projects and few experienced personnel. Also, the study identified potential benefits and limitations of the 5D-CAD based construction process for revamp projects. Key findings from this study are as follows.- - - - -5D-CAD modeling is no more optional strategy in maximizing the project value. The error-free construction planning is much more essential in revamp projects. Sharing the real-time project information can overcome communication barriers. Collaborative works are definitely can benefit from 5D-CAD modelingFull scale usage of 5D-CAD modeling can be achieved by partnering contract

Keywords: Aged-Housing, CBS(Cost Breakdown Structure), 5D-CAD, WBS(Work Breakdown Structure), Revamp Project

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Full text: content.pdf (1,426,639 bytes) (available to registered users only)

Series: w78:2008 (browse)
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Helmicki A, Aktan A, Hunt V, Wilson A

Documentation and data archival of civil infrastructure research using multimedia cd-rom

Abstract: The University of Cincinnati Infrastructure Institute (UCll) currently operates a decommissioned steel stringer bridge testbed site which is serving as the test specimen for researching and demonstrating condition assessment and structural damage detection concepts and tools. The research is designed around the iterative application of various damage scenarios followed by structural identification in order to determine the viability and sensitivity of various experimental approaches (including instrumented monitoring and modal testing) for use in objective condition assessment. This project constitutes a first of its kind attempt at the study of these methods applied under realistic damage conditions to an actual full-scale operating structure. As a result, the experimental data and results acquired during this research are potentially of great value members of the academic, government, and induslrial communities. Correspondingly, one of the goals of this research is the dissemination of results through the use of a CD-ROM multimedia database incorporating infomation in audio, video, photogrammetric, diagrammaticKADD, text, graphical, and raw numeric data formats. The goal of this effort is to effectively communicate to users all information about the project necessary to be able to make use of the experimental data and results obtained in an intelligent and informed manner. This paper describes various design and development issues connected with this database development effort.

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

Series: ecce:1997 (browse)
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Ipek Gürsel Dino

Evolutionary Optimization of Building Envelope Design with Photovoltaics-Integrated Shading Devices

Abstract: During performance-based architectural design, fa¨ade elements that have an influence on performance need to be integrally considered. This study addresses the need to support building envelope design, and specifically the design of photovoltaics-installed shading devices. Photovoltaics-installed shading devices simultaneously influence various performance criteria such as building energy consumption, daylighting and electricity production. Therefore, their design needs the support of optimization tools that help evaluate different design alternatives based on these performance criteria. This paper presents an evolutionary optimization approach that is extended from a model developed previously by the author, which optimizes multiple performance objectives towards the search for optimal envelope configurations. The tool is tested on a number of building forms with different photovoltaics-integrated shading devices, and a comparative evaluation is presented. The results show that genetic optimisation can provide meaningful insight to the problem towards well-informed decisions being taken.

Keywords: Building-Integrated Photovoltaics; Shading Device; Energy Use; Daylighting Performance, Evolutionary Optimization

DOI: https://doi.org/10.24928/JC3-2017/0158

Full text: content.pdf (1,315,615 bytes) (available to registered users only)

Series: jc3:2017 (browse)
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Joao P. Carneiro and Burcin Becerik-Gerber

Impact of Immersive and Interactive Information Visualization on OccupantÕs Lighting Choices

Abstract: Feedback systems often use Information Visualization (InfoVis) to inform occupants about the impact of their choices on energy consumption, aiming at reducing occupant behaviour related waste in buildings. In this pilot study, we use InfoVis as a tool to influence occupantsÕ opinions about a roomÕs lighting quality instead of their energy consumption. Lighting significantly affects occupantsÕ mood, productivity, and wellbeing. We utilize InfoVis to present the light quality data throughout a day via an animated daylight cycle, as well as light levels and light distributions through static and animated heat maps to enable occupants to make more informed decisions related to lighting. InfoVis is presented within the spatial context by overlaying visualizations on the room itself, on its floor and the desk surface, using an immersive virtual environment. The results show that the participants changed their choices once provided with more information related to the quality and amount of lighting in the room. Specifically, the participants changed their choices significantly more when the illuminance levels and distribution over time (dynamic heat maps) were presented. The findings of this research can inform the development of better visualization techniques that could increase occupant awareness about environmental conditions in buildings.

Keywords: Immersive Virtual Environment, Immersive Interactive Visualization, Informed Decision, Lighting Data

DOI: https://doi.org/10.24928/JC3-2017/0210

Full text: content.pdf (2,420,661 bytes) (available to registered users only)

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