基于离散-连续耦合的钢桥面铺装剪切模拟

Shear Simulation of Steel Bridge Deck Pavement Based on Discrete-Continuum Coupling

层间剪切破坏是钢桥面铺装主要病害之一,为了对钢桥面铺装复合结构层间剪切行为进行研究,基于三维离散-连续耦合方法建立了钢桥面铺装复合结构仿真模型,分析得出30℃条件下钢桥面铺装层间剪切破坏行为的变化规律,分析剪切速率对钢桥面铺装层间剪切受力状态的影响。研究结果表明过高或过低的行车速度对钢桥面铺装层都不利。对比分析离散-连续模型与离散元模型模拟结果发现,离散-连续模型计算结果更加符合实际情况。

Interlaminar shear failure of steel bridge deck pavement is the main failure of pavement.The combined discrete-continuum model of steel bridge deck pavement composite structure was established to study the interlayer shear behavior of composite structure.The change law of interlaminar failure behavior of steel bridge deck pavement structure under the temperature of 30℃and the influence of shear rate on the shear stress between steel bridge deck and pavement were analyzed.Research results show that too high or too low driving speed is disadvantageous to the steel bridge deck pavement.Compared with the calculation results of discrete element model,the discrete-continuum model is more reasonable.