HBIM parametric modelling from clouds to perform structural analyses based on finite elements: a case study on a parabol
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ORIGINAL PAPER
HBIM parametric modelling from clouds to perform structural analyses based on finite elements: a case study on a parabolic concrete vault Emilio Abbate 1 & Stefano Invernizzi 2
&
Antonia Spanò 1
Received: 8 April 2020 / Accepted: 23 September 2020 # The Author(s) 2020
Abstract The paper investigates the issue of finite element model development for the structural assessment of existing structures on the basis of detailed (terrestrial laser scanning and image-based) point clouds to parametric models generated using HBIM (Heritage Building Information Modelling) technology. Different procedures and software combinations are investigated in order to provide useful hints trying to solve some of the criticalities which are still unsolved albeit the subject has been under investigation since some years now. It is worth noting that, when assets belonging to the cultural heritage domain (CH) are considered, the difficulties increase because of the peculiarity of the structural behaviour and often the singularity of the geometrical shape. The proposed methodology is presented considering the case of the “Paraboloide” of Casale (Italy), a construction from the early reinforced concrete age, which is now a relevant example of Italian concrete industrial heritage mainly due to the thin parabolic vault and the construction methodology that was so innovative for its time. Keywords LiDAR clouds . HBIM . Structural assessment . Finite element modelling . FEM
Introduction In the field of 3D modelling derived from survey systems that combine image-based (typically photogrammetric) and rangebased (laser scanning) techniques, the effectiveness of multiscale and multisensor approaches to meet different needs in terms of accuracy of metric and radiometric information of the point model, as well as density of the information content itself, is now proven (Murtiyoso et al. 2018; Munumer and Lerma 2015).
* Antonia Spanò [email protected] Emilio Abbate [email protected] Stefano Invernizzi [email protected] 1
DAD – Architecture and Design Department, Polytechnic University of Turin, Viale Mattioli 39, 10125 Torino, Italy
2
DISEG – Department of Structural. Geotechnical and Building Engineering, Polytechnic University of Turin, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
Surely, the 3D survey based on laser scanning (TLS) is by far the preferred one for static or structural analyses, or to investigate the deviations and geometric anomalies of the factories, when it is necessary to obtain descriptive models and further modelling products of the reality under investigation that present simultaneously great reliability in terms of accuracy, information density and independence from environmental conditions at the time of acquisition (Castellazzi et al. 2015; Korumaz et al. 2017; Georgopoulos et al. 2017; Radicioni et al. 2017; Lubowiecka et al. 2009). Although it is not a rule, it is a widespread trend that to prepare topologically structured models to conduct a finite element (FE) structural
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