engleski

BIM in planning deconstruction projects

In this paper authors have explored the application, methodology and benefits of this concept for reverse and sustainable case-study project: the deconstruction of steel hall for further reuse or simply steel hall reloca-tion. Analyzed case-study was the project of deconstruction and relocation of an old military steel hall. Motivation of this research wasn’t only to analyze the applied approach of the deconstruction but also to explore the application of the BIM concept for this kind of projects. The first important notice is that there is a difference in BIM methodology for construction and deconstruction projects. While for construction projects most of the needed information about the construction design, materials and construction characteristics can be gathered and/or modeled either by the client, project team or directly by the manufacturer, in deconstruction projects those information have to be gathered on the site by verification the project documentation (which is in most cases 2D blue prints) with as-built construction condition, and by direct examination of the construction elements. Using gathered information it is possible to create a 3D model from the 2D verified blue prints. After the 3D model is finished, but before adding the other dimensions it is necessary to make an object oriented work brake-down structure in respect to: 1) global and local construction stability calculations for the deconstruction phases ; 2) technological and organizational constraints and 3) ability to reuse the construction elements. Frequent question when it comes to BIM is: how many dimensions do we need in nD modeling? For construction and deconstruction projects in general it can be answered: number of dimensions n is equal to number of criteria needed to evaluate the project. In this case- study project, time and costs are the criteria and dimensions which were added. The significant general benefit of BIM approach is that numerous of variants can be easily and quickly analyzed simply by optimizing the model regarding to the given criteria for the project evaluation with the visual model simulation as a feedback. The result of this research is a complete and integrated model of the building deconstruction. The difference between the applied deconstruction approach and the model made by authors is that model integrates all the given constraints while the problems which have occurred during the actual deconstruction are caused by the fragmented and mistimed design. Due to these failures planned construction relocation wasn’t realized in complete.

BIM ; deconstruction ; simulation

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