【作者】 祁晓娜；

【导师】 曹明兰；

【作者基本信息】 郑州大学 ， 管理科学与工程， 2013， 硕士

【摘要】 我国目前处于公路建设的快速发展时期,由于台背和其他结构的不均匀沉降,使公路桥头连接处发生损坏,造成桥头跳车的现象日益严重。桥头跳车不仅影响了通行车辆的行驶速度和行车安全,而且在一定程度上也增加了车辆的运营费用和公路的养护费用,同时减少了通行车辆和公路、桥梁的使用寿命,危害非常严重。因此,很多学者和专家研究并提出了解决桥头跳车的各种技术和措施,取得了一定的效果,但仍然存在诸多缺陷与不足。近十年以来,出现了一种新型混凝土材料,即高延性纤维混凝土,这种新型材料具有很强的抗拉能力与吸收变形的能力以及卓越的耐久性、可持续性。有鉴于此,本论文研究探讨了如何利用高延性纤维混凝土材料设计连续无缝桥头连接板来满足各种变形的需要。把高延性纤维混凝土材料应用到无缝桥头连接板上,充分发挥高延性纤维混凝土优越性能,减少桥梁的各种裂缝,同时抵抗各种变形,提高桥梁使用寿命,能够很好地解决桥头跳车防治问题,并且具有良好的经济效益。本论文简要分析了传统防治桥头跳车问题的主要技术措施、作用机理及各措施存在的不足和缺陷；研究了高延性纤维混凝土材料的力学性能、耐久性能和持续性；基于上述两部分的分析进行了高延性纤维混凝土无缝桥头连接板的构造设计和计算方法的研究,并提出了关于高延性纤维混凝土材料解决桥头跳车机制方面的一些意见和建议。高延性纤维混凝土无缝桥头连接板的使用,能够有效地提高桥头路面的连续性和平整性,使通行车辆减少颠簸从而更加平稳,不仅能够延长桥梁的使用寿命,同时也能够提高通行车辆的安全性和使用寿命。因此,使用高延性纤维混凝土无缝桥头连接板防治桥头跳车有必要在我国推广和应用。更多还原

【Abstract】 China is in the term of high-speed highway construction. Because of uneven settlement of the abutment back and other structures, the highway bridge junction damage occurs, resulting in the growing phenomenon of bridgehead bump. Bridgehead bump not only affects the access speed of the vehicle and traffic safety, but also vehicles the operating costs and road maintenance costs to some extent. At the same time, it reduces the service life of roads and bridges, the harm is very serious. Therefore, many scholars and experts have conducted the related investigations and propose a variety of technologies and measures to resolve bridgehead bump problems, and achieving some results. However, there are still many defects and shortcomings. For nearly a decade, a new type of concrete materials-Engineered Cementitious Composite (ECC), this new material has superior tensile, tensile strength and the outstanding durability and persistence. In view of this, the thesis discusses how to use high-ductile fiber-reinforced concrete to design Continuous seamless bridgehead connecting plate to meet the needs of various deformations.ECC material applied to the seamless bridgehead connecting plate, gives full play to the high ductility of ECC, reduces the cracks and deformations of bridge, improves the life of bridge, and be able to solve the bump prevention issues, and has a good economic and social benefits.This thesis is a brief analysis of the main technical problem of the traditional prevention bridgehead bump measures, mechanism of action and measures there are shortcomings and deficiencies; studying the mechanical properties, durability and sustainability of ECC materials; based on the analysis of the two parts, studying the structural design and calculation methods of ECC seamless bridgehead connecting plate, and proposing some comments and suggestions about the design of ECC material to solve bridgehead bump.The using of ECC seamless bridgehead connecting plates can effectively improve the continuity and smoothness of the bridge, reduce the bumps and let vehicles run more smoothly. At the same time, it can not only increase the life of bridges, but also improve the safety and service life of vehicles. Therefore, the application of ECC seamless bridgehead connecting plates to preventing bridgehead bump is necessary and helpful for facilitating resolving this problem.更多还原