【作者】 段正君；

【导师】 陈拴发；

【作者基本信息】 长安大学 ， 道路与铁道工程， 2007， 硕士

【摘要】 水泥混凝土路面最常见的病害主要是断板、表面的不规则裂缝和裂缝处的损坏。在行车荷载和温度应力的反复作用下,水泥混凝土路面中裂缝或接缝处由于应力集中和水的进入等原因将进一步导致如唧泥、错台、坑洞等病害发生,致使路面结构破坏。开展水泥混凝土路面板合理平面尺寸的研究,并找出接缝长度和路面板厚度之间的相关性规律,对提高水泥混凝土路面结构抗裂性能,优化路面结构设计,改进现有路面设计方法都具有非常重要的意义。本文首先通过对大量国内外相关文献和研究成果进行研究和总结,以普通水泥混凝土路面为研究对象,运用有限元法分析了不同平面尺寸、不同厚度尺寸的水泥路面板的温度翘曲应力和荷载应力。经分析,得出了四边自由的路面板荷载应力和温度翘曲应力的尺寸效应规律,以及传力杆或水平拉杆对非自由板的应力折减作用。其次分析计算了钢筋对水泥混凝土路面温度翘曲应力与荷载应力的影响,综合各影响因素后得出了寿命期内普通水泥混凝土路面和钢筋水泥混凝土路面的尺寸设计原则。最后,通过统计分析软件对计算结果分析研究,在现行设计规范的设计原则下,同时考虑路面板的荷载应力和温度应力的尺寸效应影响,推荐出不同情况下的普通水泥混凝土路面和钢筋水泥混凝土路面平面尺寸组合。更多还原

【Abstract】 The main distresses of cement concrete pavement are transverse cracking, irregular surface cracking and joint failures. These distresses are of early failures. Due to repeated traffic loading and temperature stresses, as well as stress concentration factor and water injection, water bleeding and pumping, slab staggering and pot holes would occur on joints or cracks and result in structural distresses. Researching on proper plane dimension of cement concrete pavement slab and finding out correlation between plane size and thickness are very important to enhance the resistance cracking performance of cement concrete pavement structure, to select optimum structures and to improve the present design methods.Firstly, based on literature review of a large number of relevant domestic and international research findings, this thesis focused on plain cement concrete pavement (PCCP ) and analyzed temperature warping stress and load stress on different size of concrete pavement slabs with finite element analysis method. After the analysises above, it found the size effect laws on both load stress and temperature warping stress, as well as laws of stress reduction effect of dowel bars and collars on plates with 4 free edges. Secondly, it analyzed effect of reinforcing steel bars on load stress and temperature stress to jointed reinforced concrete pavement (JRCP).It also gave size design principles of slabs to both PCCP and JRCP according to various relevant factors.Finally, after analysis of the computing results by some census software, according to principles of the present specifications and considering size effect of both load stress and temperature warping stress ,this article gave some recommended values to plane size design for slabs of both PCCP and JRCP under different situations.更多还原