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为优化水泥混凝土路面传力杆布设间距设计,以有限元理论为基础,依据中国水泥混凝土路面设计规范设置模型参数,建立了文克勒地基上考虑不利荷载作用时的单层面板3D有限元模型。基于模型得到2种传力杆布设方式情况下面板的力学响应值,计算出等间距时接缝传荷系数(LTE)对间距的关系式、LTE和板最大位移,并分析轮迹集中布设传力杆的作用效果。研究结果表明:等间距布设传力杆时,在LTE与传力杆间距计算模型下,间距在450~1 800mm之间变化时,LTE变化小;轮迹集中布设传力杆将LTE平均提高3.015%,且传力杆根数越少提高值越大;LTE相等时,轮迹集中可将每条接缝处传力杆根数平均减小1根,与均布相比,即使减少1根传力杆时仍对板位移产生有利影响,且具有良好的经济效益。
In order to optimize the spacing design of dowel bar on cement concrete pavement, based on the finite element theory and according to the design parameters of cement concrete pavement in China, model parameters of single layer 3D finite element model with unfavorable load were established. . Based on the mechanics response of the panel with two types of dowel bar arrangement, the relationship between the joint transmission coefficient (LTE) and pitch, the maximum displacement of LTE and the board at the same pitch is calculated. Force effect of the lever. The results show that: when the dowel bar is laid at equal intervals, the change of LTE is small when the spacing is between 450 and 1800 mm under the LTE and dowel bar pitch calculation model; %, And the smaller the number of dowel bars, the larger the value is. In the case of LTE equalization, the number of dowel bars at each seam can be reduced by an average of 1, and even if the number is reduced by 1 The dowel bar still has a beneficial effect on the plate displacement, and has good economic benefits.