摘要
对分别采用支架法和DBI法施工的水泥混凝土路面传力杆空间位置的现场探测表明:传力杆的支架法施工质量要优于DBI法施工质量,同时得到了路面施工结束后的传力杆空间位置偏差的范围和主要规律。继而通过三维有限元模型,分析了传力杆不同偏差情况下,水泥混凝土路面板内应力分布和传力杆偏差所造成的路面主要破坏形式。并通过室内疲劳试验,评价了传力杆不同偏差情况下(水平面内和垂直面内0°,5°,10°,15°)的接缝传荷能力衰减规律。最后对疲劳试验后的试件进行逐级加载,估算了传力杆的松动量,验证了接缝传荷能力下降的原因。
The field position detection of dowel bar for cement concrete pavement adopting bracket construction method and DBI method are conducted. The result shows that bracket construction method made the construction quality of dowel bar better than DBI method, and the spatial position deviation range and main trends of dowel bar at the end of pavement construction are obtained. Then, the stress distribution in cement concrete pavement and damage types of road pavement resulted in dowel bar deviation under different deviations of dowel bar are analyzed by 3D finite element model. Finally, the attenuation laws of joint load transfer of dowel bar ability are evaluated through laboratory fatigue experiment under different deviations （0°, 5°, 10°, 15° in the horizontal plane and the vertical plane）, the misalignment of 0°, 5°, 10°, 15° in the horizontal plane or the vertical plane respectively. Finally, by step loading on the specimens after fatigue test, the looseness of dowel bars are estimated to verify the reduction of loading transfer ability .
出处
《公路交通科技》
CAS
CSCD
北大核心
2015年第8期39-44,共6页
Journal of Highway and Transportation Research and Development
基金
民航科技项目(MHRD20130109)
关键词
道路工程
传力杆
三维有限元模型
传荷系数
位置探测
松动量
road engineering
dowel bar
3D finite element model
load transfer coefficient
position detection
looseness
