Roofing System Product Model: Life Cycle Economic Implications

نویسندگان

  • Dana J. Vanier
  • Arne Nesje
چکیده

The objectives of the Building Envelope Life Cycle Asset Management (BELCAM) project is to assist asset managers by developing methods to predict the remaining service life of building envelope components, and by providing tools to optimize maintenance expenditures. The project concentrates on roofing systems, as a “proof of concept”, but will apply the tools, procedures and methods to other building envelope systems in future stages of the BELCAM project. The product modeling activity for the BELCAM Project has five phases. The first phase of the activity deals with condition assessment surveys. Phase II deals with risk and reliability. The objective of the current phase of the product modeling activity is to incorporate life cycle economics into the roofing system product model. Future phases include: Phase IV will deal with maintenance management, while Phase V will deal with CADD and geometric data. Phase II of the project developed models to predict the remaining service life of roofing systems, but they also can predict the probability of failure. Once the remaining service life is calculated, and the risks of failure are known, these data can be used to calculate the life cycle costs of the roofing system. Computer modeling using life cycle costing, alongside data from condition assessment surveys, risk analysis and a costing database, makes it possible to calculate the life cycle costs of various repair strategies and present these to the user. Product modeling plays a key role in the integration of data in the BELCAM project. RÉSUMÉ Les objectifs du projet de gestion des biens au cours du cycle de vie de l’enveloppe du bâtiment (BELCAM) vise à aider les gestionnaires immobiliers en établissant des méthodes de prédiction de la durée de vie résiduelle des éléments de l’enveloppe des bâtiments et en leur fournissant des outils pour optimiser les ressources investies dans l’entretien. Le projet est actuellement axé sur les toitures, afin de valider les principes, mais ses outils, procédés et méthodes seront appliqués à d’autres éléments de l’enveloppe lors des prochaines phases de l’initiative. L’activité de modélisation des produits du projet BELCAM comporte cinq phases. La première phase porte sur les études d’évaluation de l’état des couvertures. La phase II porte sur les risques et sur la fiabilité. L’objectif de la phase actuellement en cours est d’incorporer l’économie du cycle de vie à la modélisation des produits de toiture. Les phases à venir incluent : la phase IV, où les chercheurs se pencheront sur la gestion de l’entretien, et la phase V, qui sera axée sur la CAO et sur les données géométriques. La phase II du projet a vu le développement de modèles permettant de prédire non seulement la durée de vie résiduelle des systèmes de toiture, mais aussi leurs probabilités de défaillance. Une fois que la durée de vie résiduelle est calculée et que les risques de défaillance sont connus, ces données peuvent être utilisées pour calculer les coûts pendant toute la durée de vie utile de la toiture. Une modélisation informatique fondée sur l’évaluation du cycle de vie, ainsi que sur les données connexes tirées des études d’évaluation de l’état des ouvrages, des analyses des risques et d’une base de données d’établissement des coûts, permet de calculer les coûts du cycle de vie de différents stratégies de réparation et de les présenter à l’utilisateur. La modélisation des produits joue un rôle clé dans l’intégration des données au projet BELCAM.

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تاریخ انتشار 1998