Abstract: Numerical analysis was adopted to analyze the stress-strain response of the prefabricated cement concrete with circular tongue and groove joints caused by the variation of span-vector ratio under the standard axle load. The conclusions show that: different span-vector ratios corresponding to mechanical behaviors of different configuration plates vary; the larger span-vector ratio is beneficial to the mechanical behavior of convex plate; however, the smaller span-vector ratio is beneficial to mechanical behavior of concave plate. Different span-vector ratios have great impact on the deflection displacement and load transfer performance of the tongue and groove joints: when the span-vector ratio is 2.5, tongue and groove joints are of the most unfavorable stress state; when the span-vector ratio is 3.5, tongue and groove joints have the best ability of load transfer. Choosing a reasonable span-vector ratio is beneficial to prevent the early destroy of tongue and groove joints, which can extend the service life of the pavements.

Key words: highway engineering, tongue and groove joints, numerical analysis, span-vector ratio, load transfer coefficient

摘要： 采用数值分析手段，对标准轴载作用下跨矢比的变化引起的圆企口装配式水泥混凝土路面企口缝处的应力应变响应情况进行了分析。研究表明:不同跨矢 比对应不同构造板块的受力性能各不相同，较大跨矢比有利于凸板受力，较小跨矢比有利于凹板受力；不同跨矢比对应接缝挠度变形及传荷能力影响明显 ，跨矢比为2.5时，企口缝处于最不利受力状态，跨矢比为3.5时，企口缝传荷能力最好。选择合理跨矢比有利于防止企口缝早期破坏，延长路面使用寿命 。

关键词: 道路工程, 企口缝, 数值分析, 跨矢比, 传荷系数