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Woodbury R

What's in a part?

Abstract: Self-generating part-of hierarchies based on rules are proposed.

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Full text: content.pdf (700,346 bytes) (available to registered users only)

Series: w78:1992 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.analysis (0.030826)
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Permission to reproduce these papers has been graciously provided by Research Press of the National Research Council of Canada. The support of the editor, Dr. Dana Vanier, is gratefully appreciated.


Yongcheol Lee, Eunhwa Yang, Charles Eastman and Kathy Roper

Modularized Validation of a Building Information Model According to the Specifications of the Facility Management Handover and Cobie

Abstract: With increasing requirements and complexity in building projects, diverse domain experts employ a neutral file format, which is exchangeable and interoperable among heterogeneous BIM authoring tools and applications in diverse disciplines. The Construction-Operations Building Information Exchange (COBie) is a set of the specifications of building data exchange pertaining to building asset information. For interoperability, COBie is defined as a model view, which is the subset of the Industry Foundation Classes (IFC) schema. For ensured interoperability of BIM data, using COBie model view, domain professionals and software developers need to identify 1) whether their IFC instance files include required information on building asset management and 2) whether their IFC interfaces accurately import/export IFC files according to the COBie specifications. However, since no approach currently supports this validation testing, professionals manually evaluate an IFC instance file and their IFC binding processes in order to identify semantic errors, technical problems, and translation mapping issues. To enhance the efficiency of this time-consuming and labor-intensive evaluation process, this study proposes a validation framework for evaluating IFC instance files pertaining to the conformity to the COBie specifications. In addition, this study formalizes the requirements of the COBie model view using identified rule logic. For validation, rules are implemented on a modularized validation platform developed on top of the IfcDoc tool, which is a model view documentation and validation tool.

Keywords: BIM, IFC, Facility Management, Cobie, Interoperability Checking

DOI: https://doi.org/10.24928/JC3-2017/0080

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Series: jc3:2017 (browse)
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Yu Zhang, Alan Kwan, John Miles

Using generative representations for structural design

Abstract: Work in recent years has shown that topological reasoning with search algorithms using traditional rep-resentations such as parameters, ground structures, voxels, etc is very limiting. Each type of representation is only to be suitable for a limited number of topologies. This is restrictive because there are many problems where the topology of the solution is unknown except in the most general terms or there are competing topologies which are suitable for solv-ing a given problem. Hence, at best, choosing a representation technique can be difficult and at worst it can restrict the search so that a full examination of the problem is not possible. Also, as the available computational power increases and the technology of search algorithms is enhanced, the topologies being reasoned about become ever more complex and so the representations within the algorithms can become cumbersome. A possible solution to these difficulties is the use of generative geometries where the object is represented by a set of rules which describe how to create the object. These can, when correctly implemented, give a compact representation and one which can be handled within typical search algorithms like for example genetic algorithms. This paper looks at the use of L-systems. They are being applied to beam design problems although this paper focuses on the representation. As will be shown in the paper, although the representation has some attractions, there are also some difficulties with the implementation and especially with en-forcing constraints. The paper describes work which is in progress rather than a completed project.

Keywords: generative representation, evolutionary computation, structures, search algorithms

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Full text: content.pdf (333,992 bytes) (available to registered users only)

Series: w78:2007 (browse)
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Zarli A, Richaud O, Buckley E

Requirements, barriers and trends in advanced technologies for the large scale engineering uptake

Abstract: Corporations are today becoming largely distributed, and deeply founded on networking technology allowing to share and access information in different locations. In the same time, information systems have become the spinal chord of the modern enterprise, appropriate information tools satisfying fast reactive business requirements and offering a strategic corporate advantage. One of the main issues now is to ensure that the vital information, for which the virtual enterprise has a special dependency, is easily accessed and manipulated by multiple actor-oriented applications, thereby satisfying the need for improved customer service, on-time delivery, quality management and project co-ordination. With the popularity of the Web and its use in productive industry environments, the coupling of suppliers, manufacturers, and customers seems an attractive and reachable goal. Applications are requested to authorise employees, business partners and customers to access critical data from their desktop anywhere in the world over the Internet, supporting the browsing of data and documents contained in large electronic vaults by connecting to the server from any supported WEB browser client, provided they have appropriate access privilege. This paper aims at identifying, with a focus on the Building Construction sector, the current major requirements and barriers along with the possible use of new standard based technology in order to foster a better industrial exploitation of the large information sources located both on the WEB and in enterprises databases accessible through the WEB. Needs can be: * End-user and process oriented needs, like information modelling, persistent and coherent data storing, data exchange and distribution, availability and interoperability issues, concurrent access, security (i.e. data protection and confidentiality levels configuration), uniform access to any type of databases, uniform presentation on client side (i.e. not from any tool-oriented point of view), coupling of WEB data with internal corporate information, etc. * Needs in terms of computer-based systems, as open architecture, scalability, reusable components, integration of legacy systems, flexibility, and so on. Despite advances in computer technology providing more reliable and relevant mechanisms and tools for information management in the large, companies still deal with intricate and non flexible corporate information systems, with an increasing complexity in software development and use. To mask this complexity, we promote the concept of business objects (BO), which are software components encapsulating business rules and aiming at providing secure sophisticated access to diverse electronic content and applications. BO (*) are defined as components of the information system representing the enterprise business model, and are to be promising enablers to build information systems meeting end users and customers requirements, thus revealing critical to the success of the enterprise. BO will be managed in the WONDA (**) project, which aims at extending the infrastructure and services of current wide area networks towards a broader industrial and commercial usage, for the deployment of the information and communication infrastructure in the industry. WONDA will be a framework of open and interchangeable BO enabling configurability according to business solutions. It will offer an industry-wide and enterprise-wide framework for the development of WEB solutions to construction industry business needs, thus turning the WEB into a viable infrastructure for industrial manufacturing and commerce.

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Full text: content.pdf (86,086 bytes) (available to registered users only)

Series: w78:1998 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.commerce (0.041943) class.collaboration (0.031481) class.strategies (0.021536)
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Permission to reproduce these papers has been graciously provided by Royal Institute of Technology, Stockholm, Sweden. The assistance of the editors, Prof. Bo-Christer Björk and Dr. Adina Jägbeck, is gratefully appreciated.


Zhang S,Teizer J,Perez E,McDonald M

Automated safety-in-design rule-checking for capital facility projects

Abstract: Safety-in-design (SID) reviews are mandatory for capital facility projects because they eliminate hazards before activities in the construction, operation, and maintenance phases take place. Existing SID review processes which many large corporations have in place, however, still rely mainly on manual input and judgment of experienced safety experts. Often very skilled humans make decisions based upon paper-based drawings or three-dimensional visualization models. As such, tasks in safety-in-design review sessions remain to be manual and thus are very much time-consuming, expensive. Furthermore, if not all hazards are detected and mitigated, they can be potentially error-prone. Unsafe design ultimately exposes workers at risk as it provides an unsafe work environment. It can also become very costly if unsafe design is detected outside of the design and construction planning phases of a capital facility project. The objective of this work was to develop a safety code compliance checking technology that does not replace human judgment, but supports human decision making of safety experts, designers, engineers, and field staff. The developed work applies novel safety code compliance checking algorithms on intelligent information models which are prepared during design and construction planning. The initial scope of the developed algorithms is limited to check for safe work access and egress requirements in existing information models. As existing safety rules and best practices are embedded in the developed code compliance checking system, they can be automatically executed on information models which exist for every capital facility project. A case study is presented to illustrate its practical implementation for an off-shore oil platform. Results show that the developed system generates automated reports that list the safety violations and furthermore, along with visual screenshots of the unsafe object in the information model, indicate the process of how these issues can be mitigated based upon established best safety practices. The significance of human-assisted decision-making in SID reviews and its potential to lead to safer designs early in a project is explained.

Keywords: Capital facility projects,design for safety,design reviews,information modeling,rule checking,3D model,safety-in-design

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Series: convr:2013 (browse)
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Zhiliang M, Juan C

A collaborative environment for building construction project toward computerization of total information

Abstract: This study aims at developing a collaborative environment for construction projects in order to computerize the project management of building construction. As a first simplification, the project management team is assumed to consist of the following staffs, manager, planning staff, technical staff, production staff, quality staff, material staff and financial staff, each representing a function for the project. It is proposed in this study that, a collaborative environment is provided and that each staff works on the environment to fulfill his own work, to share the project information with other staffs according to predefined rules for information access, and to coordinate with them. Domain models have been established, and a prototypical collaborative environment, which is used to manage the total project information in the proposed pattern and works on a client/server database management system on Local Area Network (LAN), has been developed.

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Full text: content.pdf (83,478 bytes) (available to registered users only)

Series: w78:1999 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.communication (0.077339) class.environment (0.029090) class.analysis (0.013244)
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Permission to reproduce these papers has been graciously provided by the Research Press of the National Research Council of Canada. The support of the editors, particularly Dr. Dana Vanier, is gratefully appreciated.


Zhiliang Ma and Zhe Liu

Ontology- and Freeware-Based Platform for Rapid Development of BIM Applications with Reasoning Support

Abstract: In the Architecture, Engineering and Construction (AEC) area, a remarkable tendency is to use the Building Information Modeling (BIM) data to carry out analysis and calculation based on rules specified in regulations or standards so that the BIM applications with reasoning support (BIM-R applications) are necessary. The current way to develop BIM-R applications separately and represent rules by coding or in proprietary formats has the problems of both cost and efficiency. To solve the problems, a new way is proposed, i.e. to use a platform for rapid development of BIM-R applications (BIM-R platform) implemented based on ontology and freeware components. The research establishes 1) the functional requirements of the BIM-R platform, 2) the mechanism to transform BIM data into ontology data, and 3) the architecture of the BIM-R platform, and selects freeware components to be used. A platform is implemented accordingly and applied to develop a prototype BIM-R application for as-bid cost estimation of buildings for verification. The proposed platform can help reduce cost and improve efficiency for the development of BIM-R applications and can be used by both researchers and developers.

Keywords: BIM (Building Information Modeling), Reasoning, Rapid Development Platform, Ontology, Freeware

DOI: https://doi.org/10.24928/JC3-2017/0330

Full text: content.pdf (644,038 bytes) (available to registered users only)

Series: jc3:2017 (browse)
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