CAJ | 학술논문

为获得含脱空水泥混凝土路面交通荷载下的疲劳损伤机理，开发了疲劳损伤本构关系的ABAQUS用户子程序UMAT，分析了全耦合方法下基准路面结构模型疲劳损伤场的分布与发展规律，并研究了交通荷载与面板弹性模量、面板厚度、脱空尺寸等路面结构参数对水泥混凝土路面结构裂纹形成疲劳寿命的影响。研究结果表明，随荷载作用次数的增加，路面结构的疲劳损伤不断增加，但其增幅逐渐减小，路面结构的荷载应力也逐渐减小。随着交通荷载的增加，路面结构的对数疲劳寿命呈线性减小趋势；随着面板厚度的增加，路面结构的对数疲劳寿命呈线性增加趋势；随着脱空尺寸的增加，路面结构的对数疲劳寿命呈幂函数曲线相关关系。
위획득함탈공수니혼응토로면교통하재하적피로손상궤리，개발료피로손상본구관계적ABAQUS용호자정서UMAT，분석료전우합방법하기준로면결구모형피로손상장적분포여발전규률，병연구료교통하재여면판탄성모량、면판후도、탈공척촌등로면결구삼수대수니혼응토로면결구렬문형성피로수명적영향。연구결과표명，수하재작용차수적증가，로면결구적피로손상불단증가，단기증폭축점감소，로면결구적하재응력야축점감소。수착교통하재적증가，로면결구적대수피로수명정선성감소추세；수착면판후도적증가，로면결구적대수피로수명정선성증가추세；수착탈공척촌적증가，로면결구적대수피로수명정멱함수곡선상관관계。
In order to obtain the fatigue damage mechanism of cement concrete pavement with void under traffic load,the user subroutine UMAT (user-defined material mechanical behavior) in ABAQUS for the fatigue damage constitutive relation is compiled.Then,the distribution law and the development law of the fatigue damage field of the standard pavement structure model by the fully coupled approach are analyzed.Finally,the influences of traffic load and the pavement structural pa-rameters such as the slab elasticity modulus,slab thickness and void size on the crack formation fa-tigue life of the cement concrete pavement structure are researched.The results show that with the increase in the number of load cycles,the degree of fatigue damage of pavement structure increases continuously while its increment rate decreases.Meanwhile,the load stress in the pavement structure also decreases gradually.With the increase of the traffic load,the natural logarithm of the pavement structural fatigue life decreases linearly.With the increase of the slab thickness,the natural logarithm of the pavement structural fatigue life increases linearly.With the increase of the void size,the natu-ral logarithm of the pavement structural fatigue life exhibits a decline curve of the power function.