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Dynamic Response and Failure Modes of Reinforced Concrete Columns Under Vehicle Impact and Blast

TIAN Li;HU Yang;School of Civil Engineering,Tianjin University;Key Laboratory of Coast Civil Structure Safety of Ministry of Education,Tianjin University;  
The models of reinforced concrete column,vehicle,explosive and air were established by software ANSYS/LS-DYNA,and the validity of the models was verified by simulation.The influence of different parameters on the dynamic response of reinforced concrete column was studied by using the whole process staged numerical simulation method,and the failure modes of the columns were analyzed.The results show that the increases of vehicle speed and explosive quantity will increase the horizontal displacements in the middle of column.The increases of column section inertia moment and stirrup ratio can improve the impact resistance of the column.Although the increases of axial compressive strength of concrete and longitudinal reinforcement ratio can decrease the horizontal displacements of column,but the reduced values are not very large in a certain range.The failure modes of the column mainly include the local damage,the whole bending shear failure and the whole shear failure.
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