Damage Prediction in Reinforced Concrete Structures under Cyclic Loading

by B. Garstka, Ingenieurbau und, Konstruktions-software Essen, Essen, Germany,
W. B. Kr?tzig, Ingenieurbau und, Konstruktions-software Essen, Essen, Germany,
F. Stangenberg, Ingenieurbau und, Konstruktions-software Essen, Essen, Germany,

Document Type: Proceeding Paper

Part of: Spatial, Lattice and Tension Structures


Assessment of the stiffness, resistance and damage behaviour of reinforced concrete members under high cyclic loading due to earthquake actions must consider material nonlinear effects very accurately. In the presented paper hysteretic models after the lamina method for flexure and axial force and after the truss analogy for shear have been derived based on uniaxial material laws for concrete and steel. These models have then been implemented in a physically nonlinear reinforced concrete beam element numerically described by the Finite-Element-Method. The theoretical models were calibrated with experimental data obtained by own large-scale tests and from the literature. The damage indicator DQ for reinforced concrete sections has been evaluated and verified by test results in the course of the 'Special Research Centre of Structural Dynamics' at Bochum (SFB 151). It allows a meaningful quantitative damage assessment under both monotonic and cyclic loads between 0% and 100% (virgin state to collapse). This damage indicator is implemented in the above described nonlinear beam element to predict damage evolution in cyclically loaded reinforced concrete members.

Subject Headings: Reinforced concrete | Concrete beams | Structure reinforcement | Damage (structural) | Damage (material) | Cyclic loads | Seismic loads

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