【作者】 贾春芬；

【导师】 赵人达；

【作者基本信息】 西南交通大学 ， 桥梁与隧道工程， 2007， 硕士

【摘要】 “未老先衰”已成为混凝土结构面临的一个严峻问题，混凝土结构的耐久性也已越来越多地写入设计与施工规范。本文对影响混凝土简支梁桥耐久性的各种因素作了系统的归纳，并结合层次分析法和模糊综合评定法提出混凝土简支梁桥的耐久性评估。论文的主要内容包括：1、分析了现阶段混凝土结构面临的问题，论述了桥梁结构耐久性的研究内容、国内外的研究现状及桥梁耐久性评估的定义、内容和方法。2、论述了影响混凝土桥梁耐久性的主要因素，主要包括：碱—骨料反应、钢筋锈蚀、氯离子侵蚀、混凝土碳化、冻融循环等等，总结了针对各种病害的预防措施，以及从总体上提高混凝土桥梁耐久性的主要途径。3、论述了层次分析法和模糊综合评定法及其在混凝土简支梁桥耐久性评估中的应用，并建立了混凝土简支梁桥的评估模型。4、初步开发了混凝土简支梁桥耐久性评估系统，并运用该评估系统对既有桥梁进行了评估。5、论述了混凝土结构各种维修处理方法。更多还原

【Abstract】 The too fast deterioration has been a critical problem faced by concrete structures, and the durability of concrete has been more and more written into design and construction codes. This thesis generalizes the determinants influencing the durability of concrete simply-supported girder bridge and combines with the analytical hierarchy process and fuzzy integral evaluation to carry out the evaluation of durability of concrete simply-supported girder bridge. The main contents include:1. The author analyzes the problems faced by concrete structures, discusses the research contents of durability of concrete bridge structures and the current research states of the world and describes the definitions, contents, and methods of bridge durability evaluation.2. The author discusses the determinants influencing the durability of concrete bridge, including alkali-aggregate reaction, steel bar corrosion, chloride ion corrosion, concrete carbonization, freeze-thaw cycle, etc. The author concludes the preventive measures aiming at various disease and main ways integrally increasing durability of concrete bridge.3. The author analyzes and describes the analytical hierarchy process, fuzzy integral evaluation, and their applications in durability evaluation of concrete simply-supported girder bridge, establishes an evaluating model of concrete simply-supported girder bridge.4. The author exploits the durability evaluation system of concrete simply-supported girder bridge, and applies the system to evaluateexisting bridges.5. The author discusses various methods of maintenance and repair ofconcrete structure.更多还原