Abstract
Abstract. Building Information Modelling (BIM) technique has been widely utilized in heritage documentation and comes to a general term Historical/Heritage BIM (HBIM). The current HBIM project mostly employs the scan-to-BIM process to manually create the geometric model from the point cloud. This paper explains how it is possible to shape from the mesh geometry with reduced human involvement during the modelling process. Aiming at unbuilt heritage, two case studies are handled in this study, including a ruined Roman stone architectural and a severely damaged abbey. The pipeline consists of solid element modelling based on documentation data using Autodesk Revit, a common BIM platform, and the successive modelling from these geometric primitives using Autodesk Dynamo, a visual programming built-in plugin tool in Revit. The BIM-based reconstruction enriches the classic visual model from computer graphics approaches with measurement, semantic and additional information. Dynamo is used to develop a semi-automated function to reduce the manual process, which builds the final BIM model from segmented parametric elements directly. The level of detail (LoD) of the final models is dramatically relevant with the manual involvement in the element creation. The proposed outline also presents two potential issues in the ongoing work: combining the ontology semantics with the parametric BIM model, and introducing the proposed pipeline into the as-built HBIM process.
Highlights
Building Information Modelling (BIM), as an initial instrument for the parametric design of new buildings, shows potentialities for applications to the documentation of architectural heritage
The level of detail (LoD) concept, both defined in the fields of GIS and BIM, is in practice principally used to differentiate multi-scale representation of semantic 3D models and indicate the geometric detail of a model, primarily of buildings (Biljecki et al, 2016)
This paper presented a methodology for the generation of unbuilt Heritage BIM (HBIM) from segmented solid elements to reveal the lost constructions according to the archives and ruins
Summary
Building Information Modelling (BIM), as an initial instrument for the parametric design of new buildings, shows potentialities for applications to the documentation of architectural heritage. Recent works using BIM technique on demolished historic buildings focused on the comparison of semantic HBIM model with traditional CAD modelling systematics (Boeykens et al, 2012; Apollonio et al, 2013; Ludwig et al, 2013) Such processing is conducted entirely by manual processing, which is accordant with the original BIM bottom-up process: parametric modelling of the specific parts for the studied heritage, and integrating the elements into the BIM model (Casu and Pisu, 2016). The BIM parametric elements (i.e., columns, roof, slabs, and walls) (Section 2.2) are manually created according to the historical archive of the dimensional shape and the scanning of remaining structures, and a semi-automatic modelling procedure is developed by Dynamo visual programming to build the geometric primitives to the semantic BIM model (Section 2.3).
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