Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Advances in Concrete Construction Volume 14, Number 3, September 2022 , pages 153-167 DOI: https://doi.org/10.12989/acc.2022.14.3.153 |
|
|
 open accessApplication of Lagrangian approach to generate P-I diagrams for RC columns exposed to extreme dynamic loading |
||
Chunwei Zhang and Masoud Abedini
|
||
| Abstract | ||
| The interaction between blast load and structures, as well as the interaction among structural members may well affect the structural response and damages. Therefore, it is necessary to analyse more realistic reinforced concrete structures in order to gain an extensive knowledge on the possible structural response under blast load effect. Among all the civilian structures, columns are considered to be the most vulnerable to terrorist threat and hence detailed investigation in the dynamic response of these structures is essential. Therefore, current research examines the effect of blast loads on the reinforced concrete columns via development of Pressure- Impulse (P-I) diagrams. In the finite element analysis, the level of damage on each of the aforementioned RC column will be assessed and the response of the RC columns when subjected to explosive loads will also be identified. Numerical models carried out using LS-DYNA were compared with experimental results. It was shown that the model yields a reliable prediction of damage on all RC columns. Validation study is conducted based on the experimental test to investigate the accuracy of finite element models to represent the behaviour of the models. The blast load application in the current research is determined based on the Lagrangian approach. To develop the designated P-I curves, damage assessment criteria are used based on the residual capacity of column. Intensive investigations are implemented to assess the effect of column dimension, concrete and steel properties and reinforcement ratio on the P-I diagram of RC columns. The produced P-I models can be applied by designers to predict the damage of new columns and to assess existing columns subjected to different blast load conditions. | ||
| Key Words | ||
| blast loads; damage index; Lagrangian method; P-I diagram; RC columns; vulnerability assessment | ||
| Address | ||
| Multidisciplinary Center for Infrastructure Engineering, Shenyang University of Technology, Shenyang 110870, China. | ||
| References | ||
| ||