Comparative Study of CDP and JH2 Damage Model of Koyna Dam Under Blast Loading by CEL Technique

Present study aims to analyze the dynamic response of Koyna dam with reservoir interaction under the influence of underwater explosion in ABAQUS/CAE. For dam water interaction, water in the reservoir is modeled by volume of fluid method in coupled Eulerian Lagrangian (CEL) technique in which each element of material is meshed in Eulerian Volume fraction (EVF). Concrete is modeled as lagrangian mesh while the TNT, air and water are modeled as eulerian mesh. The response of a dam subjected to underwater explosion is studied for different targets with respect to stagnation and detonation points. Non-Linearity of concrete is considered using Johnson-Holmquist 2 (JH-2) model and Concrete Damage Plasticity model. Results are evaluated and compared based on pressure history curves subjected to different TNT weights. Effect of foundation is neglected in the present study.