基于参数变异性的连续配筋混凝土路面横向裂缝分布预估方法

发布时间：2018-01-28 06:36

本文关键词： 道路工程裂缝分布 Monte Carlo方法连续配筋混凝土路面冲断变异性 Weibull分布　出处：《长安大学学报(自然科学版)》2014年06期 　论文类型：期刊论文

【摘要】：连续配筋混凝土路面(CRCP)的病害冲断主要发生在横向密集裂缝处,故裂缝的分布预估是准确预估冲断的基础。先进行环境荷载作用下CRCP应力和位移分析,然后考虑混凝土干缩、混凝土强度、混凝土线膨胀系数等参数沿路面纵向的变异性以及材料性能随时间的变化,采用增量分析方法和Monte Carlo方法对CRCP横向开裂进行了预估,最后对预估得到的裂缝间距进行了统计分析,并与CRCP的裂缝分布调查结果进行了对比。研究结果表明:由于采用了增量分析方法,可以考虑早期产生的裂缝对后期裂缝的影响;理论预估和实地调查得到的CRCP裂缝均服从Weibull分布,理论预估方法比较合理;混凝土强度、线膨胀系数、干缩以及基层与面板间摩阻系数的变异性还需实测确定。
[Abstract]:The failure of continuous reinforced concrete pavement (CRCP) occurs mainly in the transverse dense cracks. Therefore, the prediction of crack distribution is the basis of accurate prediction of thrust. First, the stress and displacement of CRCP are analyzed under environmental load, and then the dry shrinkage of concrete and the strength of concrete are considered. The longitudinal variation of concrete linear expansion coefficient along the road surface and the variation of material properties with time are studied. The increment analysis method and Monte Carlo method are used to predict the transverse cracking of CRCP. Finally, the estimated crack spacing is statistically analyzed and compared with the results of CRCP's crack distribution investigation. The results show that the incremental analysis method is used. The influence of the early cracks on the later fractures can be considered. Both the theoretical prediction and the field investigation of the CRCP fractures are based on the Weibull distribution, and the theoretical prediction method is more reasonable. The strength of concrete, coefficient of linear expansion, dry shrinkage and variability of friction coefficient between base course and face slab need to be determined.
【作者单位】：长安大学公路学院;中交公路规划设计院有限公司;广东交通实业投资有限公司;山东省交通运输厅公路管理局;
【基金】：《公路水泥混凝土路面设计规范》(JTG D40-2011)修订项目中央高校基本科研业务费专项资金项目(CHD2011ZD010)
【分类号】：U416.2
【正文快照】： 0引言连续配筋混凝土路面(CRCP)是指在路面结构内配置钢筋,并且不设接缝的路面结构,多用于高等级路面。冲断是CRCP的主要病害形式,多发生于密集裂缝处,是由2个间距很小(小于0.6m)的横向裂缝与路面边缘和纵向裂缝所围成的区域[1]。冲断的产生会降低路面使用性能,严重影响车辆在

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