Finding the displacement of wood structure in heritage building by 3D laser scanner
Heritage buildings are highly prone to long term damage from the microclimate, scourge and vandalism, which can result in damaged materials, structures, painting and cultural heritage items. This study will focus on finding the displacement of wood structural members through the use of a 3D laser sc...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2015-08-01
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| Series: | ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | http://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/II-5-W3/165/2015/isprsannals-II-5-W3-165-2015.pdf |
| Summary: | Heritage buildings are highly prone to long term damage from the microclimate, scourge and vandalism, which can result in
damaged materials, structures, painting and cultural heritage items. This study will focus on finding the displacement of wood
structural members through the use of a 3D laser scanner and the 4D concept of time. The results will compare the scans from
different periods to find the difference (if any) in the structural member position. Wood structures usually consist of numerous wood
members connected to form the structure. However, these members can be damaged in various ways such as physical mechanisms,
chemical reactions, and biological corrosion. When damage to the wood structure occurs, the structural displacement can be affected,
and if affected severely, can lead to a building collapse. Monitoring of the structural displacement is the best way to discover
damage immediately and to preserve the heritage building. However, the Cultural Heritage Preservation Law in Taiwan prohibits the
installation of monitoring instruments (e.g strain gauge, accelerometer) in historic structures (heritage buildings). Scanning the wood
structure with 3D lasers is the most non-intrusive method and quickly achieves displacement through visualization.
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The displacement scan results can be compared with different periods and different members to analyze the severity of damage.
Once the 3D scanner is installed, the whole building is scanned, and point clouds created to build the visual building model. The
structural displacement can be checked via the building model and the differences are measured between each member to find the
high risk damaged areas or members with large displacement. Early detection of structural damage is the most effective way means
of preservation. |
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| ISSN: | 2194-9042 2194-9050 |