Akademik Veri Yönetim Sistemi
3rd International Civil Engineering and Architecture Conference (ICEARC'23), Trabzon, Türkiye, 12 - 14 Ekim 2023, ss.1-10, (Tam Metin Bildiri)
Purpose: A finite element model consisting of a
single element is used to calibrate and validate the Karagozian & Case
material model in LS-Dyna for Ultra-High Performance Concrete (UHPC) and
compare it to the results from the literature to determine the accuracy of the
material model to be used for more complex finite element models.
Study
design/methodology/approach: a
partially fixed single solid hexahedra element is used to capture and validate
the behavior of the Karagozian & Case (KCC) material model in LS-Dyna under
monotonic compression. The results will be validated using experimental data to
determine the accuracy of the material model in question. Furthermore, further
validation of the calibrated KCC model is carried out through a case study
conducted on a single concrete column.
Findings: The parameters auto-generation
capability of the KCC material model can produce acceptable results for
normal-strength concrete. However, this model needs to be calibrated to provide
reliable results for UHPC. The calibration procedure is carried out by using an
empirical stress-strain model specifically proposed for UHPC and Ultra-High
Performance Fiber Reinforced Concrete (UHPFRC). Based on the analysis results,
the calibrated material model is proven to capture the actual behavior of UHPC
with acceptable accuracy.
Originality/value: Finite element results rely on numerous
parameters. The calibration and validation of the KCC material model in this
study is an important step before commencing more complex finite element
models. The same calibration procedure present in this study can be followed in
more complex models to predict UHPC behavior.