桥面铺装层层间易出现离缝问题,层间界面的力学机理较为复杂,而传统的力学方法难以分析层间界面的损伤扩展过程。利用内聚力模型考察裂纹尖端的塑性区,裂纹面上的应力为该张开位移的函数。选取合适的内聚力模型结合相应的参数便可赋予有限元模型相应的界面单元进行模拟分析。 Departure between the deck decks is prone to occur, and the mechanical mechanism of the decks is complex. However, it is difficult to analyze the damage propagation process of the delaminated interface by the traditional mechanical methods. The cohesion model is used to investigate the plastic zone at the crack tip. The stress on the crack surface is a function of this open displacement. Choosing the appropriate cohesion model and the corresponding parameters can give the corresponding interface elements of the finite element model for simulation analysis.