复合式路面非线性损伤疲劳裂缝演化机理研究  

Research on the evolution mechanism of nonlinear damage fatigue cracks in composite pavement

作　　者：房娜仁 王雪森 胡士清 吴朝玥 韩金川 孙耀宁 于康 FANG Naren;WANG Xuesen;HU Shiqing;WU Zhaoyue;HAN Jinchuan;SUN Yaoning;YU Kang(School of Civil Engineering,Tianjin Chengjian University,Tianjin 300384,P.R.China;CCCC Second Highway Consultants Corporation,Wuhan 430056,P.R.China;China Highway Engineering Consulting Group Co.,Ltd,Beijing 100000,P.R.China;School of Highway,Chang’an University,Xi’an 710064,P.R.China;Tianjin Saiying Engineering Technology Consulting Co.,Ltd.,Tianjin 300191,P.R.China;No.6 Engineering of CCCC First Highway Engineering Co.,Ltd.,Tianjin 300450,P.R.China)

机构地区：[1]天津城建大学土木工程学院,天津300384 [2]中交第二公路勘察设计研究院有限公司,武汉430056 [3]中国公路工程咨询集团有限公司,北京100000 [4]长安大学公路学院,西安710064 [5]天津市赛英工程技术咨询有限公司,天津300191 [6]中交一公局第六工程有限公司,天津300450

出　　处：《重庆大学学报》2025年第3期107-120,共14页Journal of Chongqing University

基　　金：天津市交通运输科技发展计划项目(2022-08);天津市教委科研计划项目(2022ZD003);天津市自然科学基金青年项目(22JCQNJC01550);山东省交通运输科技计划(2022B16)。

摘　　要：现有复合式路面裂缝扩展机理研究重材料轻结构、模拟方法多样,但精确度不高、路面结构难以充分反映实际工况等问题,对非线性损伤复合式路面疲劳裂缝扩展行为展开深入研究。采用损伤力学理论、剩余强度理论、加速加载试验、Python算法等研究手段,完成水泥混凝土板接缝传荷力学行为模拟,编写分布载荷子程序+用户材料子程序+自定义损伤起始准则子程序+扩展有限元主程序用以实现循环荷载作用下复合式路面疲劳损伤-断裂全过程模拟,得到反射裂缝扩展速率、路面内部材料累积损伤及剩余强度、路表弯沉值4个指标在循环荷载作用下的退化规律。结果表明,随着荷载作用次数的增加,疲劳损伤的累积速度逐渐增加,剩余强度逐渐减小;损伤累积的速度与剩余强度降低的程度相关。100 kN、160 kN、220 kN轴载作用下裂缝扩展阶段的寿命分别占路面全寿命周期的43.94%、35.34%、28.82%;40 km/h、60 km/h、100 km/h速度作用下裂缝扩展阶段的寿命分别占路面全寿命周期的46.83%、43.94%、43.13%;超载对路面稳定性影响更大。Existing researches on the crack propagation mechanisms in composite pavement often focus on materials,but do not emphasize structure.There are many simulation methods,but they are difficult to reflect actual working conditions.To solve these problems,this study conducts an in-depth investigation on the fatigue crack propagation behavior of non-linear damage in composite pavements.Using damage mechanics theory,residual strength theory,accelerated loading tests,and Python algorithms,a comprehensive simulation of the mechanical behavior of cement concrete slab joint load transfer was conducted.A cycle fatigue damage-fracture simulation system was established using the DLOAD subroutine,UMAT subroutine,UDMGINI subroutine,and XFEM main program.This system reveals the degradation patterns 4 key indexes under cyclic loading:reflection crack propagation rate,internal material damage,residual strength,and pavement deflection.The results show that fatigue damage accumulates with the increase of loading cycles,leading to a gradual decline in residual strength,with the damage accumulation rate closely linked to the extent of residual strength reduction.Under axle loads of 100 kN,160 kN,and 220 kN,the crack propagation phase accounts for 43.94%,35.34%,and 28.82%of the pavement’s full life cycle,respectively.For vehicle speeds of 40 km/h,60 km/h,and 100 km/h,the crack propagation phase comprises 46.83%,43.94%,and 43.13%of the pavement’s life cycle,respectively.Overloading significantly impacts pavement stability,accelerating fatigue damage and reducing service life.

关 键 词：路面 反射裂缝 疲劳损伤 剩余强度 

分 类 号：U416.2[交通运输工程—道路与铁道工程]