基于内聚力模型的UHPC-沥青磨耗层层间损伤演化数值模拟
Numerical Simulation of Interfacial Damage Evolution in UHPC-Asphalt Wearing Course Based on Cohesive Zone Model
摘要: UHPC层与沥青磨耗层层间有效粘结对延长钢桥面铺装层使用寿命，避免脱层、滑移等病害十分重要。依托实体工程项目，建立了正交异性钢桥面局部铺装结构，基于内聚力模型和Abaqus二次开发Usdfld子程序，研究车辆循环荷载作用下引起层间损伤的主要因素，层间损伤的最不利位置和层间疲劳损伤演化规律。模拟结果表明：车辆循环荷载作用下层间损伤由横桥向和纵桥向的剪应力引起，剪应力最大值在轮载作用区域边缘，为0.184 MPa，层间损伤的最不利位置和剪应力最大值分布区域一致，层间疲劳损伤累积以基于断裂能的损伤演化准则计算，以界面刚度退化率D表征，随着车辆循环荷载作用次数增加，D以非线性方式不断增大，在损伤演化后期，D的变化速率加快，当荷载循环次数为1106万次时D增大至1，层间粘结失效。最后利用修正的Chaboche模型对数值模拟结果非线性拟合，得到层间疲劳损伤演化方程。
Abstract: Effective interfacial bonding between the UHPC layer and asphalt wearing course is essential for extending the service life of steel bridge deck pavements and preventing distresses such as delamination and slippage. Based on an actual construction project, a localized pavement structure was established on an orthotropic steel bridge deck. Through the cohesive zone model and Abaqus user-defined field subroutine (Usdfld) development, this research investigates: Primary contributing factors to interfacial damage under vehicular cyclic loading, critical damage-prone locations at the interface and evolution mechanisms of interfacial fatigue damage. Simulation results demonstrate: Interfacial damage is primarily induced by transverse and longitudinal shear stresses under vehicular cyclic loading. The peak shear stress (0.184 MPa) occurs at the periphery of the wheel load application zone. Critical interfacial damage locations coincide with the maximum shear stress distribution areas. Interfacial fatigue damage accumulation follows a fracture energy-based evolution criterion, characterized by the stiffness degradation rate D. D increases nonlinearly with increasing loading cycles, exhibiting accelerated deterioration in later evolution stages. At 11.06 million loading cycles, D reaches unity, indicating complete interfacial bonding failure. Finally, the modified Chaboche model was employed to perform nonlinear fitting of the numerical simulation results, yielding the interfacial fatigue damage evolution equation.
文章引用：戴克学. 基于内聚力模型的UHPC-沥青磨耗层层间损伤演化数值模拟[J]. 土木工程, 2025, 14(12): 3002-3013. https://doi.org/10.12677/hjce.2025.1412322

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