Title:
Material Modeling for Concrete Structures Subjected to High Strain Rate Deformation
Author(s):
Neul Oh, Junhwi Ye, Hyukjun Ahn and Jae-Yeol Cho
Publication:
Symposium Paper
Volume:
365
Issue:
Appears on pages(s):
50-78
Keywords:
reinforced concrete, structural modeling, strain-rate deformation, finite-element analysis
DOI:
10.14359/51746684
Date:
3/1/2025
Abstract:
This paper reviews the state-of-the-art finite-element analysis (FEA) for reinforced concrete (RC) structures subjected to high-strain-rate deformation and focuses on RC panels subjected to impact loads. Despite extensive experimental studies on the impact behavior of RC panels, a robust concrete material model for accurate simulation of high-strain-rate scenarios is lacking. To address this gap, this study aims to identify the optimal concrete material model for predicting local damage in RC panels impacted by projectiles by simulating the collision of a large commercial aircraft with critical infrastructures, such as nuclear power plants. In this study, the theoretical foundations and parameters of concrete material models were examined to simulate realistically the local responses of RC panels subjected to dynamic loading, specifically focusing on hard projectile impacts at velocities ranging from 100 to 220 m/s (328 to 722 ft/s). Single-element analyses were conducted followed by finite-element simulations of scaled-down aircraft impact tests to assess the ability of the models to predict the failure modes, residual projectile velocities, and damaged areas. Among the four concrete models available in LS-DYNA, the concrete damage model (release 3) provided the best results for the four panels experimentally tested in this study.