Abstract With the increasing demand for high-rise structures, the use of deep foundations has become essential to ensure structural stability. On the other hand, the importance of explosive loading makes it necessary to take adequate measures regarding its effects on piles. In this research, numerical analysis of tapered and cylindrical piles has been performed using Abaqus software and Coupled Eulerian-Lagrangian (CEL) method. The results reveal that tapered piles exhibit superior performance under explosive loading compared to cylindrical piles, particularly for longer piles (length-to-diameter ratio > 10). The displacement of pile heads decreases with increasing explosion depth and decreasing soil elastic modulus. Reliability analysis, conducted using the Monte Carlo Simulation (MCS) method and considering uncertainties in soil properties, demonstrated that tapered piles have a lower probability of damage compared to cylindrical piles under similar blast conditions. The damage index was defined based on the residual axial load-carrying capacity of the piles. For a specific scenario, pile T31, with an 80% probability of collapse, demonstrated the worst performance, while pile C20, with a 52% probability of low damage, exhibited the best performance. These results emphasize the importance of pile geometry, soil characteristics, and explosion depth in foundation design for high-risk environments.
Mohammadizadeh et al. (Tue,) studied this question.