Mayur Baxani | Nirma University of Science and Technology (original) (raw)

Papers by Mayur Baxani

Due to different accidental or intentional events, blast loads have received considerable attenti... more Due to different accidental or intentional events, blast loads have received considerable attention in recent years and have become important service load for some structures. An attempt has been made in this paper for dynamic analysis of 3D brick masonry wall of size 2025 mm x 1800 mm x 102.5 mm under blast loads. Numerical simulation studies to characterize the various structural effects of explosions are presented. A coupled numerical approach using Lagrangian and Eulerian methods is adopted for the incorporation of the essential processes, namely the explosion, shock wave propagation, shock wave-structure interaction and structural response, in the same model. The charge and the air are modeled with Eulerian mesh, while the wall is modeled with Lagrangian mesh. The explicit finite element modelling and analysis are carried out in ANSYS AUTODYN software. The main focus is to evaluate localized damage and global dynamic response of a masonry wall for blast due to a charge of 0.5 k...

Blast induces shock loading on structures and in recent years great emphasis is being given to un... more Blast induces shock loading on structures and in recent years great emphasis is being given to understand the blast effect on structures. Normally, conventional structures are not required to be designed for blast loads because it is a low probability event. An attempt has been made in this paper for numerical simulation taking into account the interaction between the structure and shock wave for dynamic response of a multi-storey 2D Reinforced Concrete (RC) frame due to above-ground explosion. A fully Coupled Eulerian-Lagrangian (CEL) approach is used to evaluate the dynamic response. The objective of the paper is to study the structural effect of above-ground explosion using ANSYS AUTODYN software, especially focusing on failure mechanism as well as the significance of the ground vibration in the entire process. All the processes from the detonation of the explosion charge to the complete demolition, including the propagation of the blast wave, its interaction with the structure and structural response are reproduced. Numerical problem as available (Yong Lu and Zhongqi Wang 2006) is solved to validate the results obtained through finite element model developed using 2D plane stress element. A charge-weight of 1000 kg TNT equivalent at 1 m above the ground surface and at stand-off distance of 30 m from the front face of the structure is considered. The responses comprising of acceleration and damage are found to be reasonably matching with that available in literature. The damage to the building frame primarily occurs in the elements on the front face and considerably less severe damage is observed in the interior and structural elements on the back face of the structure. The validated finite element model is used to carry out parametric studies to develop better understanding of the influencing parameters.

International Conference on Advances in Civil Engineering Materials and Processes, ICACEMAP 2015, Coimbatore Institute of Technology, India, Jan 7, 2015