纵坡弯道桥面沥青铺装结构剪应力分析  

Shear Stress Analysis of Bridge Deck Asphalt Pavement for Longitudinal Slope Curve

作　　者：祁文洋[1] 孔晨光 于增义 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804 [2]山东高速股份有限公司,山东济南250000 [3]山东华鉴路桥技术有限公司,山东济南250000

出　　处：《华东交通大学学报》2014年第3期18-22,共5页Journal of East China Jiaotong University

摘　　要：依据纵坡弯道车辆荷载作用特性,建立纵坡弯道桥面铺装结构三维有限元模型,分析车辆载重、行驶速度、弯道半径、纵坡坡度、沥青铺装层厚度与模量对水平剪应力的影响。结果表明:设计时避免最小半径极限值与纵坡坡度最大值同时出现,适当增大沥青铺装上层模量、铺装层总厚度、减小沥青铺装下层模量,并严格控制纵坡弯道上车速及车辆载重,可减少沥青铺装层发生推移病害的可能性。Based on the properties of vehicle loads on longitudinal slope and curved sections, this paper establish-es the 3D finite element model for the bridge deck pavement, analyzing effects of the vehicle loads, running speed, the radius of curved sections, longitudinal slope degree, the thickness and modulus of asphalt layer on horizontal shear stress. Results show that in order to avoid the appearance of the minimum radius and the maximum longitudi-nal slope degree at the same time, it is advisable to increase modulus of upper asphalt layer and the total thickness of asphalt layer, decrease sub-layer modulus, and limit the vehicle speed and load at the curved sections so that translation diseases of asphalt layer can be reduced.

关 键 词：道路工程 纵坡弯道 桥面铺装结构 沥青铺装层 推移 有限元 水平剪应力 

分 类 号：U416.217[交通运输工程—道路与铁道工程]