Explosive Damage Law and Rapid Calculation Model for RC Bridge Piers
For the prediction of damage effect of reinforced concrete(RC)bridge piers subjected to explosion,the effects of explosive equivalent,explosion distance,explosion height,pier diameter,longitudinal reinforcement rate,hoop reinforcement rate,axial compression ratio and other parameters on the damage pattern and residual bearing capacity of RC bridge piers are discussed in detail through numerical simulation,and the damage law and residual bearing performance of a typical land-based RC bridge pier under the action of explosion load are obtained.As the explosion height increases,the ground reflection effect is weakened so that the residual bearing capacity increases,and an appropriate increase in the axial compression ratio can enhance the residual bearing capacity of bridge pier.By using the sub-coefficient method and taking the residual bearing capacity of RC bridge piers after explosion as an indicator,a formula considering a wide range of explosion parameters,the bridge pier component parameters and the initial stress state is proposed for calculating the damage effect of round RC bridge piers,which can quickly predict the damage of typical bridge piers subjected to explosion.
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