In Vienna, especially in the inner city, surfaces that are still buildable are becoming ever scarcer.
This means that the old houses are extended through loft extensions and extra stories, in order to create space for new and modern real estate.
This has now become highly charged, as since the 01/07/2018, all existing houses that were built before 1945 may no longer be demolished without authorisation.
As well as load-bearing capacity investigations, these extensions must fulfil capacity requirements (proof of stability in the event of an earthquake).
In practice, the calculations for this are usually made in costly and complicated Excel tables according to the Eurocode, or by replacement staff in
a finite-element program after the investigation.
In occasional cases, a program with the FME method is also used for calculating brick building capacities.
A direct comparison of these three methods is not only the subject of a master thesis that one of our employees is currently working on
but will also serve to obtain a reliable statement about the behaviour of historical buildings in the event of earthquakes.
The aspect of time investment, various weak points and strong points and a direct confrontation of the various results will be highly interesting.