Impact on concrete structures - experiment and simulation

The simulation of a reinforced concrete structure, that is hit by a fast object, requires sophisticated methods in finite element modelling to obtain realistic results. The project focus is on realistic and efficient models for the impact loading, the boundary conditions and the nonlinear behaviour of material and structure with respect to the strain rate. The aim is the developement and application of a comprehensive model for finite element simulation of impact on reinforced concrete structures in order to evaluate the residual
load bearing capability after the impact and the resistance to impact loading of the structure

Research topics

• Development and evaluation of efficient models for the loading to represent the complex situation of an impact

• Realistic simulation of load propagation in the structur by application of symplectic time integration methods

• Development of a macroscopic material model for concrete by a gradient enhanced plasticity within the microplane framework

• Evaluation and further development of continuous and discrete crack models

• Thermodynamic consistent coupling of models for material and crack with respect to inertia and rate dependency

• Calibration of the model parameter on the results of static and dynamic experiments

• Evaluation of different models for reinforcement for their application on impcat simulations

• Simulation of the impact on reinforced concrete structures with subsequent evaluation of the the residual load bearing capability and the structure's resistance to impcat loading

Funding

Deutsche Forschungsgemeinschaft (DFG)

In collaboration with

• Institut für Massivbau, TU Dresden
• Fraunhofer-Institut für Kurzzeitdynamik, Ernst-Mach-Institut, Freiburg

Publications

Zreid, I.; Kaliske, M.: Regularization of microplane damage models using an implicit gradient enhancement, Interational Journal of Solids and Structures 51 (2014) 3480-3489

Zreid, I.; Kaliske, M.: An implicit gradient formulation for microplane Drucker-Prager plasticity, International Journal of Plasticity 83 (2016) 252-272

Qinami, A.; Zreid, I.; Fleischhauer, R.; Kaliske, M.: Modeling of impact on concrete plates by use of the microplane approach, International Journal of Non-Linear Mechanics 80 (2016) 107-121

Kühn, T.; Steinke, C.; Sile, Z.; Zreid, I.; Kaliske, M.; Curbach, M.: Dynamische Eigenschaften von Beton im Experiment und in der Simulation, Beton- und Stahlbetonbau 111 (2016) 41-50

Steinke, C.; Özenç, K.; Chinaryan, G.; Kaliske, M.: A comparative study of the r-adaptive material force approach and the phase-field method in dynamic fracture,
International Journal of Fracture (2016) doi:10.1007/s10704-016-0125-7

Steinke, C.; Zreid, I.; Kaliske, M.: On the relation between phase-field crack approximation and gradient damage modelling, Computational Mechanics (2016 submitted)