000021547 001__ 21547
000021547 005__ 20170622131251.0
000021547 04107 $$aeng
000021547 046__ $$k2017-06-15
000021547 100__ $$aAbir, M.
000021547 24500 $$aNUMERICAL SIMULATION OF BLAST WAVE PROPAGATION IN LAYERED SOIL FEATURING SOIL-STRUCTURE INTERACTION

000021547 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021547 260__ $$bNational Technical University of Athens, 2017
000021547 506__ $$arestricted
000021547 520__ $$2eng$$aIn recent decades, the blast load impact on structures has acquired considerable attention due to magnified threats from various man-made activities. Understanding the shock wave propagation in soil and its interaction with structure are crucial in a blast scenario. In a surface or sub-surface blast, the shock wave mechanics and its subsequent impact on underground or above ground structures are extremely complex. This paper scrutinizes the problem of an underground explosion initiated by penetrated missile and thereby focuses on the characteristics of shock wave propagation and pressure attenuation in the surrounding soil. Analyzing empirical data for the same reflects different attenuation factor for different type of soil. Numerical simulations of blast wave propagation in soil and the effect of soil-structure interaction are implemented in a computationally efficient way using an advanced finite element analysis tool (LS-DYNA). Constitutive material models are used to simulate the non-linear behavior and damage profile in concrete and soil. Observations on the numerical model reveal a close tally with theoretical calculations in predicting shock wave characteristics in an undisturbed wave propagation. Numerical analysis is essential to study the exact conditions prevalent during a sub-surface blast. The above mentioned condition has been theoretically tested for a surface blast and results compared to confirm sub-surface blast having much greater impact at a longer distance. An attempt has been made to capture the Transmission and Reflection phenomena related to pressure wave propagation at the interfaces of multi layered media that is actually evident in the case of blast wave passing through layered soil. Preliminary study on wave propagation in rock media highlighting the difference in behavior of the shock waves in soil and rock is presented and discussed as well.

000021547 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021547 653__ $$aBlast Pressure, Wave Propagation, Soil-Structure Interaction, Numerical Method Simulation, Non-Linear Material Model.

000021547 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021547 720__ $$aAbir, M.$$iSubash, T. R.$$iSekaran, B. Dhana$$iArumugam, D.
000021547 8560_ $$ffischerc@itam.cas.cz
000021547 8564_ $$s873694$$uhttps://invenio.itam.cas.cz/record/21547/files/16936.pdf$$yOriginal version of the author's contribution as presented on CD, section: [RS28] Wave propagation
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000021547 962__ $$r21500
000021547 980__ $$aPAPER