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针对双层连续配筋混凝土路面的特点和现有研究中的不足,以弹性层状理论体系为理论基础,运用ABAQUS有限元软件建立双层连续配筋混凝土路面有限元模型,对路面模型的钢筋层布置位置、配筋率、重载情况进行研究。研究结果表明:在不超过保护层厚度的前提下,CRC板的最大拉应力随钢筋层间距增大而减小;当上层钢筋布置在CRC板上1/3或下层钢筋布置在CRC板下1/3时,上层钢筋轴向最大拉应力总是大于下层钢筋轴向最大拉应力,最大相差近2倍;当配筋率增加幅度相同时,减小钢筋间距的方式比增大钢筋直径的方式更能有效减小CRC板最大拉应力;在相同配筋率的前提下,双层布筋比单层布筋在应对重载交通荷载作用时有一定的优势。
Aiming at the characteristics of double continuous reinforced concrete pavement and the shortcomings in the existing research, based on the elastic layered theoretical system, the finite element model of double continuous reinforced concrete pavement is established by using ABAQUS finite element software. Layer layout position, reinforcement ratio, heavy load situation to study. The results show that under the premise of not exceeding the thickness of the protective layer, the maximum tensile stress of the CRC plate decreases with the spacing between the reinforcement layers. When the upper reinforcement is arranged on the CRC plate 1/3 or the lower reinforcement is arranged under the CRC plate 1 / 3, the maximum axial tensile stress of the upper steel bar is always greater than the maximum axial tensile stress of the lower steel bar, with a maximum difference of nearly 2 times. When the reinforcement ratio is increased by the same amount, the way of reducing the steel bar spacing is more than that of increasing the steel bar diameter Which can effectively reduce the maximum tensile stress of CRC board. Under the premise of the same reinforcement ratio, double-layer reinforcement has some advantages over single-layer reinforcement when dealing with heavy traffic loads.