【作者】 朱健；

【导师】 戴绍斌； 张鹏；

【作者基本信息】 武汉理工大学 ， 结构工程， 2003， 硕士

【摘要】 钢筋混凝土结构如果设计得当，施工质量可靠，在正常环境条件下具有良好的耐久性，但当上述条件不满足时常会因为钢筋的锈蚀而影响结构的使用性和耐久性。在国外，每年由于钢筋锈蚀造成的损失高达数百亿美元；在我国，各类结构中的钢筋锈蚀问题也日益突出，尤其是在早期建造的桥梁及一些海工建筑中钢筋锈蚀情况非常严重。为了解决钢筋的锈蚀问题，国内外学者通过几十年的研究找到了几种较为有效的措施，其中采用新型碳纤维塑料筋(CFRP)在目前是较为可靠的一种。碳纤维塑料筋是采用特殊工艺制造的新型复合材料，它具有强度高，密度小，耐腐蚀等优点，能够取代普通混凝土结构和预应力混凝上结构中的普通钢筋和预应力钢筋，尤其是在钢筋锈蚀问题严重的地区。 本文介绍了对国内某专业纤维制造厂所生产的碳纤维塑料筋所进行的一系列试验研究。在这些试验中我们首先对碳纤维塑料筋在混凝土、环氧树脂和素水泥浆中的粘结性能进行了研究，分别测出了碳纤维塑料筋在这几种介质中的粘结强度并对实验数据进行了分析，指出了存在的问题和应该采取的解决办法。然后我们对采用碳纤维塑料筋作为受拉主筋的普通混凝土梁在三分点竖向荷载作用下的抗弯性能进行了试验，对试验中梁试件的承载力、挠度和裂缝开展等性能进行了分析并得出了相关结论。最后我们对采用碳纤维塑料筋作为无粘结预应力筋的后张混凝土梁试件在三分点竖向荷载作用下的抗弯性能进行了研究，在总结梁试件承载力、挠度和裂缝等性能的同时介绍和分析了试验中所采用的预应力锚具以及张拉过程中的预应力损失等问题，并给出了关于该试验的一些结论。另外，在试验分析的基础上，我们运用有限元分析软件ANSYS对碳纤维塑料筋普通混凝土梁在三分点竖向荷载作用下的受力状况进行了模拟，得出了详细的计算结果。 本文通过试验所得出的结论主要针对所研究的碳纤维塑料筋产品，但是相关的研究方法和部分结论、建议同样可以为类似研究所参考、借鉴，在今后对碳纤维塑料筋的进一步研究中具有一定的参考价值。更多还原

【Abstract】 With proper design and reliable construction, reinforced concrete structure owns good durability in normal surroundings. But if the conditions mentioned above can not be attained, the usage performance and endurance will be damaged because of the corrosion of steel tendons. The economic loss due to rebar corrosion adds up to tens of billions US dollars aboard. In China, the problem of rebar corrosion is increasingly serious in every kinds of constructions, especially in some bridges and marine structures built in many years ago. To resolve the problem, experts have found several measures in many years study. One of them is the application of Carbon Fiber Reinforced Plastic (CFRP) tendons. This way proved to be dependable in present time. CFRP tendon is a new composite material manufactured by special technology, it has many advantages such as high-strength, low-density, better corrosion-resistant and so on, so it can potentially replace steel tendons in normal concrete structures and prestressed concrete structures, particularly in areas where corrosion is a problem.This paper describes the experiment about the CFRP tendons produced by a factory in Nanjing. The experiment includes three parts. In the first part, we tested the coherence of the CFRP tendons with concrete, epoxy resin and neat cement grout and got the cohesion strength correspondingly. Base on these data, we pointed out the problem of the tendons and provided the solution method. In the second part, we researched the bending strength of CFRP tendon concrete beams, analysed the function of bearing, deflection and crack of the beams and got the conclusion. In addition, we carried on the simulation analysis about the beams by the finite element analysis software ANSYS, so that we can get a comprehensive summing-up. In the last part, we researched the bending strength of post-tensioned and cohesionless CFRP tendon concrete beams. In this part we summarized the performance of bearing, deflection and crack of the beams. At the same time, we introduced the research about the anchorage device and the prestressing loss.The conclusion of the paper is about the CFRP tendons we studied, but the interrelated study methods and some conclusion can be consulted in similar researches. In the latter research about the application of CFRP tendons in concrete structures, this paper will give full play to its effect.更多还原