不同温度下水泥混凝土桥面铺装结构抗剪性能研究  

Shear performance of cement concrete bridge deck pavement structure at different temperatures

作　　者：康广朝 董春晓 李若晨 赵堃甫 位可可 KANG Guangchao;DONG Chunxiao;LI Ruochen;ZHAO Kunfu;WEI Keke(Henan Communications Investment Construction Group Co.Ltd.,Zhengzhou 450000,China;Henan Provincial Communications Planning&Design Institute Co.Ltd.,Zhengzhou 450000,China)

机构地区：[1]河南交投交通建设集团有限公司,河南郑州450000 [2]河南省交通规划设计研究院股份有限公司,河南郑州450000

出　　处：《新型建筑材料》2024年第3期111-115,共5页New Building Materials

基　　金：河南省交通运输厅科技计划项目(2019J-2-4)。

摘　　要：为研究不同温度下水泥混凝土桥面铺装结构的抗剪性能,采用ABAQUS有限元软件建立桥面铺装三维数值模型,分析不同温度影响下桥面铺装结构受剪状态,与水泥混凝土-防水粘结层-沥青混合料复合试件抗剪强度建立联系。结果表明:桥面铺装在车辆荷载紧急制动作用下,沥青面层所受纵向和横向剪应力随温度的升高而减小,调平层、沥青下面层与调平层层间结构所受纵向和横向剪应力随温度的升高而增大;涂膜类防水粘结层在安全温度范围内(<40℃)的抗剪强度要高于碎石封层类,但涂膜类防水粘结层对温度的敏感性大于碎石封层类;防水粘结层在危险温度范围内(>45℃),车辆紧急制动不利于层间结构的稳定。In order to study the shear performance of cement concrete bridge pavement under different temperatures,a three-dimensional numerical model of bridge pavement was established by ABAQUS finite element software.The shear state of bridge pavement under different temperatures was analyzed,and the relationship between the shear strength of cement concrete,waterproof bond layer and asphalt mixture composite specimens was established.The results show that for bridge deck pavement under emergency braking of vehicle load,the longitudinal shear stress and transverse shear stress of asphalt surface decrease with the increase of temperature,and the longitudinal shear stress and transverse shear stress of leveling layer,interlayer structure between the lower layer of asphalt and the leveling layer increase with the increase of temperature.The shear strength of the film waterproof adhesive layer in the safe temperature range(<40℃)is greater than that of the gravel sealing layer,but the temperature sensitivity of film waterproof adhesive layer is greater than that of crushed stone sealing layer.When the waterproof bond layer is in the dangerous temperature range(>45℃),the emergency braking of the vehicle is not conducive to the stability of the interlayer structure.

关 键 词：水泥混凝土:桥面铺装 抗剪性能 防水粘结层 力学分析 

分 类 号：TU577[建筑科学—建筑技术科学]