摘要
Abstract
During the service of reinforced concrete bridge deck,due to external loads such as vehicles,the surface of the concrete structure will produce cracks.In order to study the influence of cracks(length,width,depth)on the impact resistance of reinforced concrete bridge deck,this paper uses numerical simulation method to analyze the influence of these parameters on the impact resistance of reinforced concrete bridge deck with mid-span cracks.The impact resistance in this paper is mainly characterized by impact force and mid-span displacement.The results show that under the same other conditions,the impact force of the reinforced concrete bridge deck with mid-span cracks decreases with the increase of the length,width and depth of the cracks,which is negatively correlated,while the mid-span displacement is opposite and positively correlated with it.The influence of the change of crack size on the impact force of the plate is greater than that on the mid-span displacement of the plate,and the impact force is the most sensitive to the crack depth.After the impact,oblique'cross'cracks appear at the bottom of the plate without cracks,while positive'cross'cracks appear at the bottom of the plate with cracks.关键词
钢筋混凝土桥面板/冲击荷载/裂缝/抗冲击性能/数值模拟Key words
reinforced concrete bridge deck/impact load/cracks/impact resistance/numerical simulation
