板底脱空对水泥混凝土路面接缝传荷的影响

发布时间：2019-08-03 18:29

【摘要】：基于路面力学专业有限元软件KENSLABS,建立起板底横缝处存在脱空的水泥混凝土路面双块板设置传力杆的数值模型。在考虑板重和温度翘曲的情况下,阐述了两种脱空形态(接缝两侧均脱空、受荷板一侧脱空)下脱空高度(即初始间隙)的改变对轮载传荷能力的影响,对比研究了在两种脱空形态与板底无脱空时传力杆直径、间距、松动量以及支承模量等参数对传荷能力的影响权重,分析了传力杆非均匀布设对传荷系统的优化效果。结果表明:接缝两侧均脱空、受荷板一侧脱空时,传荷系数随着脱空高度分别呈递增、递减规律,但传荷系数趋于稳定时,接缝两侧均脱空时,板块最大挠度的绝对值更大;不同脱空形态下,传力杆各项参数均与传荷系数呈线性相关关系,传力杆松动量对传荷系数的影响最为显著;不同脱空形态下,传力杆非均匀布设能提高传荷系数,同时减小传力杆承受的最大剪力。板底脱空传荷能力评价宜同时考虑传荷系数和各板块最大挠度值的绝对值,传力杆非均匀布设对传荷系统的优化宜以传荷系数和传力杆所受剪力同时评价。
[Abstract]:Based on the finite element software KENSLABS, of pavement mechanics, a numerical model of double slabs with force transfer rods at the bottom transverse joints of cement concrete pavement is established. Considering the plate weight and temperature warping, this paper expounds the influence of the change of the void height (that is, the initial gap) on the load transfer capacity of the wheel under the change of the void height (that is, the initial gap) under the two void forms (both sides of the joint are empty and the side of the load plate is emptied). The influence weights of the diameter, spacing, relaxation and supporting modulus of the load transfer rod on the load transfer capacity are compared between the two empty forms and the parameters such as the diameter, spacing, relaxation and supporting modulus of the load transfer capacity. The optimization effect of non-uniform arrangement of force transfer rod on load transfer system is analyzed. The results show that when both sides of the joint are emptied, the load transfer coefficient increases and decreases with the void height, but when the load transfer coefficient tends to be stable, the absolute value of the maximum deflection of the plate is larger when both sides of the joint are emptied, and the parameters of the force transfer rod are linearly correlated with the load transfer coefficient under different void forms, and the influence of the load transfer coefficient is the most significant. Under different void forms, the non-uniform arrangement of the force transfer rod can increase the load transfer coefficient and reduce the maximum shear force borne by the force transfer rod. The load transfer coefficient and the absolute value of the maximum deflection of each plate should be considered at the same time, and the optimization of the load transfer system should be carried out by the load transfer coefficient and the shear force of the force transfer rod at the same time.
【作者单位】：西南交通大学土木工程学院;西南交通大学道路工程四川省重点实验室;西南交通大学高速铁路线路工程教育部重点实验室;
【基金】：国家自然科学基金资助项目(编号:51378440) 国家重点基础研究发展计划(973计划)资助项目(编号:2013CB036204) 中央高校基本科研业务费专项资金资助项目(编号:SWJTU12CX067)
【分类号】：U416.216

【相似文献】