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dc.contributor.author
Frangez, Valens
dc.contributor.author
Serantoni, Eugenio
dc.contributor.author
Wieser, Andreas
dc.date.accessioned
2020-06-16T06:33:23Z
dc.date.available
2020-04-16T17:50:00Z
dc.date.available
2020-04-17T04:57:00Z
dc.date.available
2020-06-16T06:33:23Z
dc.date.issued
2020-04-14
dc.identifier.isbn
978-87-92853-93-6
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/410117
dc.identifier.doi
10.3929/ethz-b-000410117
dc.description.abstract
The construction industry is currently in a process of increased automation and digitization which has an impact on all phases of a building's lifetime, including design, fabrication, assembly, and maintenance. The goal of this innovation is to primarily boost productivity and enhance sustainability. Achieving these goals requires geometrical information about the fabricated objects, first to check for discrepancies between the as-built state and the design one, and second to assess changes over time. Point-cloud based methods, augmented with traditional geodetic metrology are well suited to provide the necessary information. In the current phase of the development, monitoring is particularly relevant because it is necessary to assess the readiness of the innovative fabrication techniques to be adopted by the industry and to assure safety to the users despite the limited experience with the construction processes, designs, and materials used. Herein we present the geodetic monitoring of three digitally fabricated structures during the early phase after construction, along with the specific challenges and the chosen solutions. The structures are parts of a real building designed and built within the National Centre of Competence in Research Digital Fabrication (NCCR dfab) at ETH Zürich. Concretely, they comprise (i) a curved wall realized by robotically spraying concrete onto a wire mesh previously built in-situ by a robot; (ii) an ultra-thin curved ceiling created using 3D printed formworks, and (iii) a robotically cut and assembled timber beam construction. Terrestrial laser scanners (TLSs) and a laser tracker (LT) with a hand-guided triangulation scanner were used. The presented deformation analysis consists of point-wise coordinate comparisons within a network, of a cloud-to-mesh (C2M) comparison of pairs of point clouds, and of a hybrid approach denoted as virtual monitoring points (VMP) approach herein, i.e. point-wise analysis derived from the independent registration of small patches of point clouds. The latter is particularly useful for monitoring of structures with salient surface structures where high accuracy is needed but no markers may be applied. The analyses showed that the structures produced using the 3D printed formwork agree with the plan to within 1.5 cm (maximum C2M deviations). The concrete and the timber structures showed maximum changes of a few mm over the time span of seven months. Using the point-wise LT measurements we found an agreement of deformation patterns with temperature for the curved ceiling.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
International Federation of Surveyors (FIG)
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.subject
Digital Fabrication
en_US
dc.subject
Engineering Geodesy
en_US
dc.subject
Structural Deformation Monitoring
en_US
dc.title
Geodetic Monitoring of Digitally Fabricated Structures Early After Construction
en_US
dc.title.alternative
Areal Monitoring of Digitally Fabricated Structures Early after Construction
en_US
dc.type
Conference Paper
dc.rights.license
In Copyright - Non-Commercial Use Permitted
ethz.book.title
FIG Working Week 2020. Proceedings
en_US
ethz.pages.start
10556
en_US
ethz.size
15 p. accepted version
en_US
ethz.version.deposit
acceptedVersion
en_US
ethz.event
FIG2020 Working Week: Smart surveyors for land and water management (cancelled)
en_US
ethz.event.location
Amsterdam, the Netherlands
en_US
ethz.event.date
May 10-14, 2020
en_US
ethz.notes
Conference cancelled due to Corona virus (COVID-19)
en_US
ethz.publication.place
s.l.
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02647 - Inst. f. Geodäsie und Photogrammetrie / Institute of Geodesy and Photogrammetry::03964 - Wieser, Andreas / Wieser, Andreas
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02100 - Dep. Architektur / Dep. of Architecture::02284 - NFS Digitale Fabrikation / NCCR Digital Fabrication
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02647 - Inst. f. Geodäsie und Photogrammetrie / Institute of Geodesy and Photogrammetry::03964 - Wieser, Andreas / Wieser, Andreas
en_US
ethz.date.deposited
2020-04-16T17:50:08Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-06-16T06:33:35Z
ethz.rosetta.lastUpdated
2021-02-15T14:41:43Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Geodetic%20Monitoring%20of%20Digitally%20Fabricated%20Structures%20Early%20After%20Construction&rft.date=2020-04-14&rft.spage=10556&rft.au=Frangez,%20Valens&Serantoni,%20Eugenio&Wieser,%20Andreas&rft.isbn=978-87-92853-93-6&rft.genre=proceeding&rft.btitle=FIG%20Working%20Week%202020.%20Proceedings
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