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Aish R

Extensible enterprise computing for construction as a necessary pre-cursor for collaborative engineering

Abstract: "Our focus is to consider the construction industry as essentially an information processing system. In its ideal form, practitioners (each with an individual internal representation of design intent) interact with other practitioners by first interacting with an information processing system that manages various shared external representation of design intent. The underlying assumption (from an information technologist's perspective) is that design data is held in a sufficiently complete representation, and that changes to this representation are transactions that move the representation from one consistent state to another. We might call this 'enterprise computing' for construction. This ideal of 'enterprise computing' for construction can be compared to the realities of current practice. - Due to its fragmentation, the construction industry generally perceives its use of information technology in terms of multiple discrete 'individual' systems (with the resulting proliferation of discrete documents) rather than as an enterprise systems. - The drawing tradition, which represents building in 2D, with different representations of the same design split across multiple independently editable documents inhibits consistent management of design and the use of analytical tools. While these may be familiar arguments, there are new object oriented and data management tools emerging from key software developer, such as Bentley Systems, that are designed to address the specific needs of a 'construction enterprise', namely geometric generality, multiple application semantics, multi-user access, and transaction management. These systems also address the scalability and reliability issues required for deployment in practice. Again, arguments for (and advantages of) systems of this type have been discussed in the research literature for more than two decades. The difference is that these systems are ready for deployment. But with this prospect for a broader application of 'Enterprise Computing' for Construction, there are associated other significant issues which may concern both the 'strategic' and the 'creative' practitioners, namely: - Semantic completeness: building a sufficiently complete multi-disciplinary representation of design intent - Data integrity: where any intelligent components are used, these should not become 'orphaned', for example, by object ""instance"" data being detached from the definitions of the corresponding class - Data longevity: the integrity of design and other data should be maintained for the life-time of the building, across new hardware platforms and operating systems. Upgrades to the application and any intelligent components should not disrupt or invalidate existing data - Parallelisation of design: individual designers or engineers should be able to work in parallel, and then be able to synchronize their changes to design data with co-workers - Expressibility: architectural design and construction engineering are open-ended domains. Additional intelligent components should be capable of being added on a ""per project"" basis. Within this context, this paper will explore the essential 'tension' that exists within the Architecture and Construction sectors. On the one hand, there is a perceived need by construction managers for computing tools based on clearly defined and agreed schema to control the construction process (thereby giving economic advantage, comparability, etc.). On the other hand, creative designers who are under other competitive pressures, are expecting a different set of computing tools to allow the exploration of new building configurations and construction geometry. While in the former case a standardisation of schema (as the foundation of a traditional ""Enterprise Computing"" system) would appear to be in order, in the later case the essential 'open-ended-ness' of the creative process demands ""extensibility"" as a pre-requisite of any computing system. These differing requirements (and indeed, attitudes) within the user community, presents software developers with interesting challenges. What technologies (for example, object and/or relational) and what 'domain abstractions' are appropriate foundations for solutions for these differing requirements. Or indeed, what technologies and 'domain abstractions' can be used as the basis for broader set of applications whose design is intended to unify across this apparent ""management-creative"" divide…hence the theme of this paper: ""'Extensible Enterprise Computing' for Construction"". Fundamentally, this is not exclusively an issue of technology. We need to address both the technical and cultural issues if we are to realise our collective ambition of providing effective tools with which to support collaboration between the diverse range of interests that occur within the Architecture and Construction sectors."

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Full text: content.pdf (827,728 bytes) (available to registered users only)

Series: w78:2000 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.communication (0.034023) class.software development (0.019513) class.represent (0.017320)
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Permission to reproduce these documents have been graciously provided by Icelandic Building Research Institute. The assistance of the editor, Mr. Gudni Gudnason, is gratefully appreciated


E Petrinja, V Stankovski & ˇ Turk

Provenance Metadata for Shared Product Model Databases

Abstract: The process of saving metadata committed to track all changes to some data, is known as ""provenance"". In the AEC/FM sector provenance data can be exploited for tracking all interactions of different users between each other and with parts of data. For a particular application, we need to consider which metadata are essential for future queries and who is going to use these. The IFC standard already contains some provenance concepts in its entity structure. We have considered these provenance concepts to build a provenance tracking software. The provenance ontology server was developed by using the OWL ontology language, already available IFC concepts and some complementary concepts that we had to include for the sake of generality of our implementation. The developed prototype allows us to upload an IFC file to a web enabled service that parses it and saves instances of retrieved concepts for later queries, according to the ontology we have defined.""

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Full text: content.pdf (297,509 bytes) (available to registered users only)

Series: w78:2005 (browse)
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Permission to reproduce these papers has been graciously provided by the Technische Universität Dresden.


M. Y. Rafiq, C. Sui, D. J. Easterbrook, G. Bugmann

Generality of using correctors to predict the behaviour of masonry wall panels

Abstract: The highly composite and anisotropic nature of masonry, which is a result of the variation in the proper-ties of the masonry constituents, makes it very difficult to find an accurate material model to predict its behaviour satis-factorily. Current research by the authors has focused more closely on the behaviour of laterally loaded masonry wall panels using model updating techniques supported by artificial intelligence (AI) tools. They developed the concept of corrector factors which models the variation in the properties over the surface of masonry wall panels. This research resulted in methodologies, which enables designers to more confidently predict the behaviour of masonry wall panels subjected to lateral loading. The paper will demonstrate the generality of using these techniques to predict the behav-iour of laterally loaded masonry wall panels tested by various sources.

Keywords: corrector factors, evolutionary computation, cellular automata

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Full text: content.pdf (711,673 bytes) (available to registered users only)

Series: w78:2007 (browse)
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