多孔混凝土基层缩缝处沥青面层温度应力分析  

Analysis of Thermal Stress for Asphalt Surface on Transverse Contraction Joint of Porous Concrete Base

作　　者：锁利军[1] 王秉纲[2] 郑传超[2] 

机构地区：[1]洛阳理工学院土木工程系,洛阳471023 [2]长安大学特殊地区公路工程教育部重点实验室,西安710064

出　　处：《武汉理工大学学报（交通科学与工程版）》2011年第3期480-483,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：河南省科技攻关项目(批准号:102102310271);河南省教育厅自然科学项目(批准号:2010B580003)资助

摘　　要：为研究多孔混凝土基层上覆沥青面层的受力状态,建立了沥青路面三维有限元模型.引入横观各向同性弹性本构关系模型实现沥青路面结构层间接触状态的数值模拟.利用有限元方法计算了多孔混凝土基层缩缝处沥青面层的温度应力.结果表明:降温时,面层模量的变化对面层的拉应力和剪应力影响较大.计算点A的拉应力随着面层模量的增大而减小,计算点B的拉应力随着面层模量的增大而增大.计算点A和计算点B的剪应力随面层模量的增大而明显增大.Three-dimension finite element model of asphalt pavement,which includes transverse contraction joint of porous concrete base and asphalt surface,is created for the aim of analyzing thermal stress of asphalt surface which is located in transverse contraction joint of porous concrete base.Horizontal isotropic elasticity constitutive model is used to simulate numerically the interface between horizons of pavement.Finite element method is employed to analyze thermal stress for asphalt surface which is located in transverse contraction joint of porous concrete base of asphalt pavement.Calculation results indicate that when fall of temperature happened,surface＇s modulus has more effect on tensile stress and shear stress than other factors.So far as calculation point A is concerned,tensile stress decreases with increase of the surface＇s modulus,while tensile stress of calculation point B increases with increase of the surface＇s modulus.Shear stress,both calculation point A and B,increases quickly with increase of the surface＇s modulus.

关 键 词：沥青路面 多孔混凝土基层 沥青面层 层间接触模型 温度应力 

分 类 号：U416.01[交通运输工程—道路与铁道工程]