7.2 Ingenieurbau
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- Ansys Autodyn (1)
- Compressive strength (1)
- DUCON® (1)
- Damage characterization (1)
- Drucker-Prager (1)
- Ductility (1)
- E-modulus (1)
- Impact (1)
- Micro-reinforcement (1)
- Mobile elements (1)
- Numerical modeling (1)
- Planar tomography (1)
- Post-impact evaluation (1)
- Quasi-static and dynamic tests (1)
- Reinforced concrete structure (1)
- Stereo photogrammetry (1)
- UHPC (1)
Organisationseinheit der BAM
- 8 Zerstörungsfreie Prüfung (2) (entfernen)
Due to the wide range of applications, the easy production and the large field of use, reinforced concrete (RC) is a widespread building material. This variety of applications is reflected in a wide range of physical material properties. Not only therefor it still is a technical challenge to provide all necessary test conditions for experimentally reproducing dynamic effects under impact loading of RC structures. In this paper we present investigations on the thicknesses of RC plates under low and medium high velocity impact loading by a flat-tipped impactor. The planar tomography setup at BAM is used to visualize the impact damage and to characterize the damage features such as cracks, scabbing and spalling. Further, the comparison of tomography results with those of an applied numeric simulation analysis is used to verify the numeric models for future damage prognosis under impact loading. Using the results of both, the tomographic as well as the FE analysis, different damage features were investigated and compared regarding their validity. Crack damage plays a leading part and the significance of summarized crack values as well as their distribution is analyzed. The total damage value but also the determined damage distribution both provide an input for describing damage as a function of the impactor velocity and plate thickness.
Within the presented research project, experimental and numerical investigations were performed to develop a thin-shelled, modular, mobile element system made of a micro-reinforced ultra-high-performance ductile concrete (DUCON®). Material parameters were experimentally determined to adapt the material model within the numerical analysis applying the Drucker-Prager relationship. Afterwards, for validation of the numerical models, quasi-static and high-velocity impact tests were performed on plate-like structures. Finally, a suitable geometry of transportable barrier elements will be designed, which provides a maximum of resistance against impact by a minimum of weight and a maximum of mobility.