基于Overlay Tester的钢桥面铺装力学特征的数值分析  

Numerical Analysis on Mechanical Characteristics of Steel Deck Pavement Based on Overlay Tester

作　　者：李兴海[1] 黄卫[1] 钱振东[1] Ray BROWN 张辰辰[1] 

机构地区：[1]东南大学智能运输系统研究中心,南京210096 [2]National Center for Asphalt Technology, Auburn Alabama 36830, USA

出　　处：《公路交通科技》2013年第10期33-38,共6页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51178114);交通运输部西部交通建设科技项目(2009318000086)

摘　　要：为采用Overlay Tester对钢桥面铺装材料性能进行评价,介绍了其试验方法和理论,利用Abaqus有限元程序建立了局部钢桥面铺装、复合梁和Overlay Tester的三维有限元模型。研究结果表明,3个实体模型具有相似由反弯作用或拉伸作用造成的拉伸效应应力分布特征。同时,复合梁的钢板部件的应力远大于复合梁的铺装层应力,复合梁的钢板承担了主要试验外力荷载,降低了对铺装层材料评价的针对性。为此,分别对0.63、0.063 mm和0.01 mm 3种不同位移加载模式的Overlay Tester进行数值分析。结果表明,传统的0.63 mm位移拉应力过大,超过铺装材料固有强度,采用0.01 mm的最大拉应力基本与钢桥面铺装的最大拉应力值在一个数量级,考虑到试验周期等因素,最终选定0.063 mm的位移模式作为今后评价钢桥面铺装材料裂缝扩展特性的加载条件。In order to use Overlay Tester to estimate the mechanical characteristics of steel deck pavement, the theory and test method of Overlay TeSter are presented. The 3D finite element models of local steel deck pavement, composite beam and Overlay Tester specimen are established by Abaqus Software. The results show that （ 1 ） the characteristics of tensile stress which result from recurvation effect and tensile effect in 3 FE models are similar; （2） the tensile stress of composite beam＇s steel plate is much larger than that of composite beam＇s deck pavement, which means the steel plate undergoes the major external force in fatigue test, while the asphalt mixture could not be tested. In this connection, numerical analysis of Overlay Tester in three displacements, i. e. , 0. 63 mm, 0. 063 mm and 0. 01 mm, are conducted. The results indicate that the tensile stress in O. 63 mm displacement is excessive which resulted in exceeding the intrinsic intensity of asphalt mixture, and the maximum tensile stress in the 0. 01 mm displacement is similar to that of local steel deck pavement. In consideration of testing cycles and other factors, the mode of 0. 063 mm displacement is selected for evaluating crack propagation of asphalt mixture of steel deck pavement in the future.

关 键 词：桥梁工程 力学特征 OVERLAY TESTER 钢桥面铺装 三维有限元 

分 类 号：U416.2[交通运输工程—道路与铁道工程]