【作者】 曾小刚；

【导师】 肖盛燮；

【作者基本信息】 重庆交通学院 ， 桥梁与隧道工程， 2004， 硕士

【摘要】 随着交通荷载量的加大以及桥梁结构自身材料的自然损伤累积的加剧,现有桥梁很多已经不能满足交通发展的要求而必须要进行加固维修。本文来源于交通部西部开发桥梁改造研究项目,其主要研究内容为桥梁的损伤、加固策略及优选,研究主线为“桥梁损伤分析—加固方案研究—桥梁加固策略制定—桥梁加固方案评选”。在损伤方面以裂缝为主要对象,主要对裂缝的分类、形成诱因、表现特征等进行了详细的归类分析;在加固方案方面,文中广泛地列举了国内外的一些常用加固方法,并配有相关简图。桥梁具有加固要求后,随后要进行加固分析及加固方法的选择。在桥梁结构的加固理论上,文中就加固策略和加固方案的优选进行了探讨。前者是基于结构可靠度理论对具体桥梁的经济性分析确定失效准则以决定桥梁是否值得加固;后者是应用系统模糊优化理论对具体桥梁的各种加固方案进行评判以确定最优方案,在实例应用中显示出一定的参考价值,具有一定的创新性。更多还原

【Abstract】 With the rapid increase of traffic volume and the accumulation of natural damage of structure materials, many bridges in existence can not meet modern traffic development so that they need proper repair and rehabilitation .The dissertation comes from a research project on highway network rebuilding under the background of Chinese Western Development. It mainly involves damages of bridges, strategy of enhancing and the optimal choice of rebuilding schemes on worn bridges. The research thread is ’Damage analysis of bridges—study of rebuilding schemes—formation of optional rebuilding schemes on worn bridges—optimal choice of rebuilding schemes’. In aspect of damage, the focus is cracking, mainly on the classification, the causes and the behavior of diversiform cracks. In aspect of rebuilding schemes, lots of multiform schemes in common use are proposed with their sketches. Then follows the analysis of rebuilding schemes and the optimal choice of the optional schemes; In line with the rehabilitation principles on bridge structures, the formation of rebuilding schemes and the sequential optimal choice are fully discussed. The former is to set the failure criteria according to reliability theory for deciding if a worn bridge is worthy of rebuilding through the economic analysis, And the latter is to decide the best scheme from many choices by application of systemic fuzzy theory about optimal option. The theory of optimal option shows some practicability and creativity.更多还原