Mechanische Kennwerte für die Nachrechnung bestehender Massivbauwerke - Vorbereitung neuer Arbeitshilfen

Mechanical properties for the reanalysis of existing reinforced concrete structures - Preparation of new tools

Currently, in Germany new technical regulations for the structural reanalysis of existing reinforced concrete structures are being prepared. The new DAfStb-Report "Mechanical properties of historical concretes, reinforcing steel and prestressing steel for the structural analysis of existing structures" [1] contains the conversion of historical mechanical properties into values, used in Eurocodes. For this purpose, the annex of the new DAfStb-Report also contains background information on the mathematical conversion.
The Report is the result of a study conducted by the TU Kaiserslautern and Zilch + Müller Ingenieure GmbH, München that was financed by the DAfStb. The DIN subgroup NA 005-07-01 UA "Bewertung von Bestandsbauwerken" has reviewed it.
Furthermore a second report on the determination of characteristic material properties is currently being prepared by DAfStb [2].
At the present time the DBV-Guide-to-good-practice "Existing Structures - Concrete and Reinforcing Steel" [3] has been updated and a new DBV-Guide-to-good-practice "Assessment of in-situ Compressive Strength of Concrete" [4] will be published.