摘要
为克服现有疲劳开裂试验无法真实模拟正交异性钢桥面铺装层实际工作状态的缺陷,作者以法国LCPC试验为基础,提出了新型铺装层疲劳开裂试验的基本构型。利用有限元方法建立该基本构型的三维有限元模型,分析了在室内试验条件下荷载加载位置、荷载作用面积、复合梁钢板厚度、铺装层试件厚度等参数对铺装层试件力学响应的影响。在力学分析结果上进行验证性试验,最终确定试验构型的各项参数,建立新型铺装层疲劳开裂试验方法。该试验方法能够真实模拟出钢桥面铺装层的实际力学响应,提升了设备加载效率,并能够充分利用现有UTM-25设备进行试验,对于钢桥面铺装层的设计、评价、选择,以及开裂机理的深入研究工作,提供科学有效的试验手段。
In order to overcome the disadvantage that the current fatigue cracking test can not reflect the practical condition of orthotropic steel bridge deck （OSBD） surfacing actually, one basic model of new improved fatigue cracking test was proposed based on French LCPC test. By using the finite element method, a three dimensional model was built for this basic test model, The loading positions, loading areas, steel plate thickness and surfacing specimen thickness were considered in evaluating the effects on the specimen mechanical responses. Verification tests were performed to determine all the test parameters based on mechanical analysis. Finally, one new improved OSBD surfacing fatigue cracking test was founded, This test can simulate the practical mechanical responses in actual deck surfacing and enhance the loading efficiency. This test can be carried out on UTM-25 and is very helpful for OSBD surfacing design, evaluation, choice, and a scientific test method is provided for further research on OSBD surfacing cracking characteristics.
出处
《交通运输工程与信息学报》
2015年第4期61-67,共7页
Journal of Transportation Engineering and Information
基金
中国博士后科学基金(2015M571644)
南京交通职业技术学院科研项目(JY1401)
关键词
钢桥面铺装层
疲劳开裂试验
三维有限元方法
开裂机理
Orthotropic steel bridge deck surfacing, fatigue cracking test, the three dimensional finite element method, cracking characteristics
