Cyclic deterioration of High-Performance Concrete in an experimental-virtual lab, SPP 2020
Modern high-performance concretes allow even lighter, more filigree and resource efficient structures, which, however, are more susceptible to vibrations due to their reduced dead weight. Structures and components such as long span bridges for high speed trains, wind power plants or machine foundations are also typically subjected to very large variable loads and a very high number of load cycle. The fatigue behavior of the high-performance concrete is decisive for the design and the realization of such concrete applications. Due to the currently existing gaps in the knowledge regarding to the formation and propagation of fatigue damages in high-performance concretes, the effective application of modern high-performance concretes is hindered.
The designed aim of this priority program 2020 is to capture, understand, describe, model and predict the material degradation of high-performance concretes using the newest experimental and virtual numerical methods. Since the damage processes occur on a very small scale, they cannot be entirely observed during the load tests. The recording of suitable damage indicators during the experiments make the time-consuming fatigue tests already very demanding. To this extent, the desired results are developed from a close cooperation between the material science and the numerical mechanics knowledge, which is the interconnection of experiment and computation in the Experimental-Virtual-Lab. The model-based description of the heterogeneous concrete microstructure as well as the damage and crack developing at different scale levels over several hundred of load cycles present particular research challenges in this priority program.
The Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) granted a funding amount of approximately 7.5 million Euro for the first period of three years. In this priority program, scientists from a total of 13 universities, i.e. 12 research projects, collaborate jointly on the investigation of damage mechanisms in high-performance concretes under cyclic loading. Every research project is executed by at least two scientists. The networking is accompanied by a central project. On this website you will find information on the priority program, the participants and the projects.
Prof. Dr.-Ing. Ludger Lohaus (Coordination)
Institut für Baustoffe, Leibniz Universität Hannover
Prof. Dr.-Ing. habil. Dr. h.c. mult. Dr.-Ing. E.h. Peter Wriggers
Institut für Kontinuumsmechanik, Leibniz Universität Hannover
Prof. Dr.-Ing. Steffen Anders
Lehrstuhl für Werkstoffe im Bauwesen, Bergische Universität Wuppertal