撑架式钢筋混凝土连续梁桥的检测评估方法与维修加固设计

发布时间：2018-06-13 05:43

本文选题：钢筋混凝土连续梁桥 + 静载试验　；参考：《广州大学》2014年硕士论文

【摘要】：国内外既有桥梁随着运营时间的增加，均存在或多或少的缺陷与损伤，为确保其安全正常运营，必要条件下需采取有针对性的维修加固措施。既有桥梁结构的性能评估是采取合理有效维修加固措施的前提和基础。此外，维修加固后桥梁结构的性能评估则是判断其加固效果和结构性能的必要手段。本文以东莞市万江大桥旧主桥（撑架式混凝土连续梁桥）为例，采用有限元理论分析结合现场静、动载试验对受损前后和加固前后实桥进行检测，并根据试验结果对关键截面进行了承载能力评估，综合分析比较加固前后试验结果，研究了该桥加固前后的受力性能，对实桥的加固效果进行评定，以此验证了采用有限元理论分析结合现场静动载试验进行桥梁评估的可行性，以及该桥加固方法的合理性。主要对以下几方面进行了探讨和研究： 1、对钢筋混凝土桥梁常用的检测和评估方法进行了归纳和总结，，并对其常用的维修加固方法进行简单介绍。 2、以实桥为例，介绍了其检测内容，继而对其主要受损和病害情况进行了调查，并根据病害调查、有限元分析结合现场静、动载试验结果对该桥进行了加固前、后的承载能力评估，为维修加固提供了依据，并验证了该桥的加固方法的合理性。 3、介绍桥梁加固设计的原则，并结合实桥的实际情况和结构特点，对其采用的体外预应力劲性混凝土结构维修加固方法的方案和施工工序进行了简要介绍。
[Abstract]:The existing bridges at home and abroad have more or less defects and damages with the increase of operation time. In order to ensure their safe and normal operation, the necessary conditions need to take targeted maintenance and reinforcement measures. The performance evaluation of existing bridge structure is the premise and foundation of taking reasonable and effective maintenance and reinforcement measures. In addition, the performance evaluation of the bridge structure after maintenance and reinforcement is a necessary means to judge the reinforcement effect and structure performance. Taking the old main bridge of Wanjiang Bridge in Dongguan City as an example, the finite element theory analysis combined with site static and dynamic load test is used to detect the real bridge before and after the damage and before and after reinforcement. According to the test results, the load-bearing capacity of the key sections is evaluated. After comprehensive analysis and comparison of the experimental results before and after reinforcement, the mechanical performance of the bridge before and after reinforcement is studied, and the reinforcement effect of the real bridge is evaluated. The feasibility of using the finite element theory analysis and static and dynamic load test to evaluate the bridge is verified, and the rationality of the reinforcement method of the bridge is also verified. This paper mainly discusses and studies the following aspects: 1. The common detection and evaluation methods of reinforced concrete bridges are summarized and summarized. Secondly, taking the real bridge as an example, the detection contents of the bridge are introduced, and then the main damage and the condition of the disease are investigated. According to the disease investigation, the finite element analysis is combined with the site static analysis. The results of dynamic load test have evaluated the bearing capacity of the bridge before and after reinforcement, which provides the basis for maintenance and reinforcement, and verifies the rationality of the reinforcement method of the bridge. 3. The principles of bridge reinforcement design are introduced. Combined with the actual situation and structural characteristics of the real bridge, the scheme and construction procedure of the external prestressed stiffened concrete structure maintenance and reinforcement are briefly introduced.
【学位授予单位】：广州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U446;U445.72

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