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使用刚性路面有限元程序ISLAB2000对横向开裂水泥混凝土路面加设传力杆进行模拟,分析讨论了加设传力杆的即时理论效果。同时,使用密歇根州与华盛顿州DBR路段FWD检测数据验证了加设传力杆理论效果的正确性。研究表明:当裂缝传荷系数大于89%时,传力杆的加设将不会提高裂缝的传荷水平。而不考虑温度梯度情况下,DBR处理后传荷系数低于80%的裂缝,荷载作用于裂缝时,各裂缝附近拉应力值大小相近。
The rigid pavement finite element program ISLAB2000 was used to simulate the transverse cracked cement concrete pavement with the dowel bar. The instantaneous theoretical effect of adding the dowel bar was analyzed and discussed. At the same time, the FWD detection data of Michigan and Washington state DBRs verify the correctness of the theoretical effect of adding the dowel bar. The research shows that when the load transfer coefficient of crack is more than 89%, the addition of dowel bar will not increase the level of transmission of cracks. Without considering the temperature gradient, the DBR-treated cracks have a transmission coefficient of less than 80%. When the loads act on the cracks, the values of tensile stress near the cracks are similar.