水泥混凝土路面板早龄期翘曲行为数值分析研究

发布时间：2018-05-14 09:32

本文选题：道路工程 + 水泥混凝土路面　；参考：《工程力学》2017年07期

【摘要】：以1/4面板结构模型程序为基础,考虑基层与面板的摩擦界面作用,开展了足尺路面板结构的三维早龄期翘曲有限元数值模拟研究,并与现场实验进行校验。对比显示,相比1/4面板模型,考虑基层摩擦接触界面的全面板模型程序板角位移计算值减小,日变化量级、趋势与试验监测结果更为接近,面板-基层界面参数对计算迭代收敛性影响较大。不同的工况组合下,由于早龄期的历程效应路面板会产生很多复杂的行为特征,计算仿真显示面板早龄期存在板角-1/4板中-板中的翘曲变形迁移运动,不同条件的边界约束导致演化形成不对称面板翘曲。在夏季28 d的记忆-松弛-记忆多次叠加历程作用下,路面板一般将产生正的固化温度差性状。由于混凝土早龄期行为的复杂性,早龄期数值模拟技术仍需研究模型优化、材料早龄期参数特性以及施工工艺的影响。
[Abstract]:Based on the 1 / 4 panel structure model program and considering the friction interface between the base and the panel, the finite element numerical simulation of the full-scale road panel structure is carried out, and the results are verified with the field experiment. The comparison shows that compared with the 1 / 4 panel model, the calculation value of the plank angular displacement of the total plate model considering the base friction contact interface is reduced, the order of daily variation is smaller, and the trend is closer to the experimental monitoring results. The interface parameters of panel-base have great influence on the convergence of iteration. Under different working conditions, due to the process effect of early age, there are many complex behavior characteristics. The simulation results show that there is a warpage movement in the plate with an angle of -1 / 4 in the early age of the panel. The boundary constraints of different conditions lead to the evolution of asymmetric panel warping. Under the action of memory, relaxation and memory superposition of 28 days in summer, the road panel will generally produce positive solidified temperature difference. Due to the complexity of the early age behavior of concrete, the numerical simulation technology of early age still needs to study the influence of model optimization, material parameter characteristics and construction technology.
【作者单位】：福州大学土木工程学院;
【基金】：国家自然科学基金项目(51478122,50908056)
【分类号】：U416.216

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