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Piehler J.,Leibniz University of Hanover | Hansen M.,Leibniz University of Hanover | Kapphahn G.,Ingenieurgesellschaft fur Experimentelle Mechanik MbH
Bautechnik | Year: 2014

From the middle of the 19th century until the beginning of World War I, many buildings were built in the Neo-Gothic style. In this period, Gothic elements were built regarding the former needs to save material. These lightweight and thin vaults are often relatively fragile support systems. They tend to show systemic damages in the form of significant crack patterns in the vault caps and arches. In the research project Preservation of Neo-Gothic vault structures, typical damages of Neo-Gothic vaulted structures are analyzed with the objective to find sustainable and rehabilitative measures. In this context, since 2011, numerical and experimental studies have been carried out on a reference structure. Measured values of a 3D laser scanning, including all the imperfections of the structure, provide the basis of the geometry model, created for the finite element simulation. The system behavior was studied experimentally in the non-critical load range with a load test for the calibration of this numerical model. In this paper, the project framework as well as the implementation and the evaluation of the load test are presented. In further papers, the transfer of the geodetic measurement data to the numerical model and the consideration of the load test results within a simulation will be addressed. © Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.


Fiedler L.,Ingenieurgesellschaft fur Experimentelle Mechanik MbH | Kapphahn G.,Ingenieurgesellschaft fur Experimentelle Mechanik MbH | Hahn G.,Leipzig University of Applied Sciences | Steffens K.,PSI Prof. Steffens Ingenieurgesellschaft MbH
Bautechnik | Year: 2011

By means of an example, it is demonstrated that the restoration and conversion of existing buildings may require an experimental evaluation of the structural safety. For a complex of industrial buildings, sufficient load-carrying capacity could not be verified by structural analyses. However, load tests of the existing differently constructed concrete ceilings allowed to prove structural safety. Copyright © 2011 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.


Bretschneider N.,Leipzig University of Applied Sciences | Fiedler L.,Ingenieurgesellschaft fur Experimentelle Mechanik MbH | Kapphahn G.,Ingenieurgesellschaft fur Experimentelle Mechanik MbH | Slowik V.,Leipzig University of Applied Sciences
Bautechnik | Year: 2012

The experimental safety evaluation of existing concrete and masonry bridges is discussed. There are different technical methods for generating test loads in situ: the utilization of hydraulic actuators and reaction frames, the application of the loading vehicle BELFA, and the measurement of the structural response during vehicle crossing. For each of the three methods, an application example is presented. The technical characteristics and the limitations of the methods are compared. © 2012 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.

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