School of Naval Architecture, Ocean&Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;Key Laboratory of Structural Engineering and Earthquake Resistance, Xi an University of Architecture and Technology, Shanxi xi an 710311, China 在期刊界中查找 在百度中查找 在本站中查找
Blast walls are widely used to prevent important architecture from terrorist attacks and accidental explosion. Diffraction flow effect makes the explosive shock flow field change and overpressure at a certain distance behind the wall is greatly increased. LS-DYNA was employed to study the diffraction flow and overpressure time-history behind blast walls in the case of an explosion near above ground. It is observed that the diffraction flow overpressure behind a wall about 1. 5 ~ 2. 5 times wall height is large,and it is more dangerous than there is no wall owing to Mach reaction happened around double wall height behind the wall. The research provides a reference for arrangement of blast walls and blast-resistant design of buildings behind the blast wall.