When the explosion occurred at the surface of structural components, this tremendous shock wave will result in structural damage and destruction, and correctly predicting the damage caused by any potential explosion is essential to the design of important buildings and protective structures. In order to identify the anti-explosion performance of RC slab under close-in explosion, using commercial hydrocode AUTODYN, a three-dimensional solid model including explosive, air and RC slab with concrete and reinforcing bars being separated is created, and the sophisticated concrete and reinforcing bar material models taking into account the strain rate effects and the appropriate coupling at the air-solid interface are applied to simulate the dynamic response of RC slab, the corresponding damage mechanisms and failure modes are analyzed under different explosive charge. The dynamic evolution process of RC slab from cracking and break-up of concrete, yield and rupture of reinforcing bar to local perforation is observed realistically, and with the increase of the explosive charge, the failure mode of RC slab gradually changes from overall flexure failure to local punching failure.
GONG Shun-feng;Deng Huan;ZHU Sheng-bo;JIN Wei-liang.
Numerical simulation on dynamic failure of reinforced concrete slab under close-in explosion[J]. Journal of Vibration and Shock, 2012, 31(2): 20-24,1
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