【作者】 马明磊；

【导师】 李惠；

【作者基本信息】 哈尔滨工业大学 ， 结构工程， 2008， 硕士

【摘要】 桥梁结构是生命线系统工程中至关重要的组成部分,其正常的服役状态关系到我国的经济发展和民生问题,但混凝土和钢材的腐蚀问题是困扰公路桥梁结构的一大难题。FRP(Fiber Reinforced Plastic)因其具有轻质、高强、耐锈蚀、减振性好等特点,成为解决桥梁结构腐蚀问题的有效途径。深入系统地研究新型FRP桥梁体系及其长期服役性能具有重要学术意义和工程应用价值的。FRP桥梁结构的研究历史较短,而有关其长期服役性能是广泛应用的关键问题。本文研究FRP模型桥梁及其健康监测系统设计方法,为进一步通过长期监测揭示其长期服役性能奠定基础。本文的主要研究内容包括:首先,建立一钢独塔斜拉桥的有限元模型,分析其静动力特性;在此基础上,根据FRP桥梁与钢桥梁材料特性的不同,提出相似比的复合物理指标,即构件截面刚度。其次,提出外部轮廓严格相似、构件截面按照复合物理指标相似(即刚度等效原则)的FRP模型桥梁设计方法,并对FRP筋-混凝土塔、FRP箱形主梁和FRP索截面和配筋进行设计;建立FRP模型桥梁有限元模型,对其静动力特性进行分析。最后,根据有限元模型分析结果,设计了FRP模型桥梁结构智能健康监测系统。更多还原

【Abstract】 Bridge engineering is a crucial component part of the lifeline system, so its healthiness is the basis of economic development and the people’s livelihood. However, Corrosion of steel and concrete is a global problem; the adaptation of fiber reinforced polymer (FRP) may solve this problem by its light weight, high strength, corrosion resistant and vibration reduction. Damages induced by the excitation from the environment are the key point which let the structure failure before the design life span. Then the study on a new FRP bridge system not only has the value of academic research but also has the significant meaning in application.The reaserch on the FRP Bridge system started not long ago. So the long term service ability of the FRP Bridge is the main consideration for its using widely or not. This article designed the FRP Bridge model and its health monitoring system, so the long term performance of the bridge will be got by the health monitoring system.Three parts of the research work are discussed:Firstly, a FEM model of a single pylon cable stayed bridge is set up, and its static and dynamic behavior have been analysisied. According to the differences about the materials characteristics between the steel bridge and the FRP Bridge, the similarity targets of the complex physical quantities are brought out.Secondly, the similarity of the profile to the bridge model has been exacuted strictly; on behalf of this, cross sections of the members are designed by using the method based on the similarity of stiffness. Otherwise, the FRP reinforced concret is designed for the pylon while the sections of the beam and the cables are designed at the same time.Finally, the FRP bridge health monitoring system and the construction scheme are finished.更多还原