P-I Diagram Generation for Reinforced Concrete (RC) Columns Under High Impulsive Loads Using Ale Method

Masoud Abedini, Azrul A Mutalib, Sudharshan N Raman
2017 Journal of Asian Scientific Research  
Article History Keywords RC column P-I diagrams Blast load Damage level ALE Algorithm LSDYNA. Reinforced concrete (RC) column systems are widely used in protective structures designed to resist blast events. Development of correlations between explosive load and the resulting damage in concrete elements are significant for incorporation of blast load in design and also for pre and post-damage assessments. The main purpose of this research is to organizing correlations between explosive load and
more » ... explosive load and damage. These correlations are being expressed in Pressure-Impulse diagrams. The damage level is calculated based on the residual axial load-carrying capacity of the damaged RC column. Finite element modeling in LS-DYNA is used to analyze the structures and calculate the damage level for each explosive phenomenon. The Arbitrary Lagrangian Eulerian (ALE) method is used to simulate the explosive loads in the reinforced concrete column. The results demonstrated that increase the column size cause to increase in pressure and impulsive asymptotes and lead to enhanced the pressureimpulse (P-I) diagram. Contribution/ Originality: Current knowledge on quantifying and predicting explosion damage of RC columns subjected to blast effects is incomplete and limited. This research examines the damage analysis of RC columns using P-I diagram. The P-I diagrams are developed to determine levels of damage on a structure and have also been used in the past to evaluate human response to shock wave generated by an explosion. before the load duration is over. The dynamic regime is characterized by the maximum response being reached close to the end of the loading regime. Lastly, the quasi-static regime is characterized by a structure having reached its maximum response before the applied load is removed. The objective of this research is to develop the P-I diagram in RC columns under explosive loads. An advanced finite element modeling tool, LSDYNA is employed for the purpose of the analysis. The Arbitrary Lagrange-Euler (ALE) algorithm is applied in this paper to simulate the blast load in RC columns.
doi:10.18488/journal.2.2017.77.253.262 fatcat:wz4n35q7ofbmlbzkicgpkljkem