考虑传力杆位置偏差的刚性路面接缝传荷预估模型

发布时间：2018-02-26 20:34

本文关键词： 道路工程预估模型有限元传荷能力传力杆位置偏差　出处：《公路交通科技》2015年03期 　论文类型：期刊论文

【摘要】：针对刚性路面传力杆空间位置偏差问题,建立了Winkler地基上考虑层间接触状况的等平面尺寸双层路面结构模型,计算了传力杆位置偏差(水平偏角、竖直偏角和埋深偏差)对接缝传荷能力的影响,并通过三元非线性回归构建了接缝传荷能力预估模型,提出了模型的荷载修正系数η1并推荐了其取值范围。经FWD实测弯沉传荷系数的验证,修正后的预估模型较好地反映了位置偏差传力杆刚性路面的接缝传荷能力。传力杆水平偏角对弯沉传荷系数影响较小,随着竖直偏角的增大,传荷系数呈线性较小,水平偏离15°时,传荷系数降低约12%。传力杆布置于面层中部时,传荷能力最大,埋设位置偏上或偏下都将引起传荷系数的下降,偏下2 cm时降幅可达10%。
[Abstract]:In order to solve the problem of spatial position deviation of force transfer rod on rigid pavement, an equal plane size double-layer pavement structure model considering interlayer contact on Winkler foundation is established, and the position deviation of force transfer rod (horizontal deflection angle) is calculated. The influence of vertical deflection angle and buried depth deviation) on the load transfer capacity of the butt joint is studied. The prediction model of the joint load transfer capacity is constructed by means of the ternary nonlinear regression. The load correction coefficient 畏 1 of the model is proposed and the range of its value is recommended. The load transfer coefficient of deflection measured by FWD is verified. The modified prediction model well reflects the joint load transfer capacity of rigid pavement with position deviation force transfer rod. The horizontal deflection angle of the force transfer rod has little effect on the deflection load transfer coefficient, and with the increase of vertical deflection angle, the load transfer coefficient is linearly smaller. When the horizontal deviation is 15 掳, the load transfer coefficient decreases by about 12. When the load transfer rod is arranged in the middle of the surface layer, the load transfer capacity is the greatest, and the load transfer coefficient will decrease when the embedding position is higher or lower, and the decrease can reach 10 when the load transfer rod is lower than 2 cm.
【作者单位】：长沙理工大学;山西省交通科学研究院黄土地区公路建设与养护技术交通行业重点实验室;山西水利职业技术学院;
【基金】：国家自然科学基金项目(51308329) 山西省自然科学基金项目(2013011027-1) 山西省交通运输厅科技项目(2013-1-10)
【分类号】：U416.222

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