【摘要】 针对连续配筋混凝土复合式沥青路面结构是以连续配筋混凝土(CRC)板作为结构承重层,沥青面层(AC)作为表面功能层的结构特点,建立多板系统有限元计算模型(空间等参元8节点六面体单元);采用有限元方法分析CRC+AC复合式路面结构的温度应力状况以及温度梯度、AC层厚度、CRC层厚度和AC层的导热系数等因素的影响;结果表明,在裂缝间距L<3.0 m内,CRC板的横向温度翘曲应力大于纵向温度翘曲应力,温度翘曲应力最不利位置仍为横向裂缝边缘中部位置.更多还原

【Abstract】 Multi system finite element model(8 nodes hexahedral element of isoparametric element)is built,which is based on the characteristics of continuously reinforced concrete and asphalt concrete composite pavement structure,CRC layer plays the major role of a load-bearing and AC surface layer plays the major role of function.Temperature stress of composite pavement structure of CRC+AC,the influence of temperature gradient,AC layer thickness,CRC layer thickness and thermal conductivity of AC layer is analyzed by finite element method.The results show that,σxmax(Transverse temperature-warping stress of CRC slab) is greater than σymax(Vertical temperature-warping stress of CRC slab) when L(crack spacing)<3.0 m,the most unfavorable position of temperature-warping stress is the central location of transverse crack edge.更多还原