Modelle und Architektur Les Maquettes d ... - Aktuell - TUM

Zusammenfassungen - Résumés - Abstracts
information, e.g. of a building. This model does not only contain geometric data, but as
well all relevant information on materials and their mechanical and thermal properties,
possible damages, costs, etc.
On the basis of an outstanding monument the speech will disclose how capable such
digital models can be for recording the stock and planning of the restoration works.
The “Venusgrotte” of Linderhof Castle close to Oberammergau was build between
1875 and 1880 forming an artificial stalactite cave. Measuring in the ground plan
approximately 40 by 40 meters and heights up to 15 meters, the stalactite cave with
its manifold small internal rooms has been erected as complex Rabitz construction
suspended from a brick-built vault.
Infiltrating water from the hill as well as building physical problems lead to severe
corrosion of the iron-made carrier netting, which causes large parts of the grotto to be
severely damaged or even threatened by collaps, today. Traditional building recording
and a representation in section drawings would not have sufficed the complex form and
construction of the building.
It was decided on producing a three-dimensional and exceedingly precise laser recording
of the entire interior as basis to a digital model of the building. The “point cloud”,
produced by `Deutsche Gesellschaft für Luft- und Raumfahrt e.V.´, was transferred into
a surface model of the interior shell. The recordation of the highly irregular surfaces
included the numerous side grottos, stalactite fields and sinter plies could be represented
completely by this method. The brick-built vaults above, stone pillars and exterior
walls as well as the hanging construction of the Rabitz surface have been recorded by
tachymetric building recording and have been included into the model. The complex
model, produced in such way, had been the basis for recording the stock as existing,
mapping of damages, statics examinations, planning of the restoration and cost
calculation.
All evidence from building archaeology and analysis of the construction has been
placed into the model. Thereby, non geometrical information, such as photographs of
evidence or data from material examinations can be “tied“ to the model. The mapping
of damages was conducted immediately in the model by defining damage categories
and marking the model respectively. Statics calculations using the method of finite
elements were applied to selected areas. Therefore the geometric model was
transferred into a statics model via an adequate interface.
The digital model of the grotto emerged to a central data base with enabling the entry
of evidence, placement of damage types and means for the restoration works and, at
the same time, forming the basis for statics calculations and cost estimates.
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Modelle und Architektur - Les maquettes et l´architecture - Models and Architecture