ٍSimulation blast response and failure analysis of pile foundations subjected to surface explosion by using Eulerian method

This paper presents the response of pile foundations to ground shocks induced by surface explosion using fully coupled and non-linear dynamic computer simulation techniques.Significant increase of terrorist attacks against significant and iconic buildings and other infrastructure components high-light the need for the blast resistant design of the structures. Blast loads are short duration dynamic loads and their duration are very much shorter (about 1000 times) than those of earthquakes. Thus, structural response under blast loading could be significantly different from that under a loading with a much longer duration such as an earthquake.An explosion on the ground surface generates both air-blast pressure and ground shock on structures which are close to the detonation point. However, wave propagation velocities are different for geo-materials and air, and as a consequence, the ground shock excites the structure foundation earlier before the air blast pressure arrives at the structure.The explosive charge was modeled using the high explosive burn material model and the Jones–Wilkin–Lee (JWL) equa-tion of state (EOS). The air modeled as ideal gas,soil with elastic plastic material and for the pile Johnson Holmquist has been used.You can see a figure of the part position at below

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