火灾后双肢薄壁桥墩的结构损伤检测

发布时间：2019-05-29 07:44

【摘要】：火灾是威胁公共安全的主要灾害形式,每年都给国家和人民带来了重大的损失。目前,火灾后结构损伤评估与鉴定工作研究不够,火灾后建筑结构的耐久性和抗震性能等的影响理论研究还不够深入,在工程检测评估的实际工作中,往往检测手段和火灾损伤的复杂性不相适应,使火灾后的损伤评估与鉴定工作过于简单和不全面。因此,对火灾后建筑结构的受损程度的检测与鉴定以及相应修复方案的研究都具有重大的意义。本文在已有的研究成果的基础上,总结了目前普遍采用的一些检测方法和手段,如目测法、回弹法、超声法、钻芯法等,并分析了各自的优缺点和使用范围。最后,本文将上述理论研究成果具体应用到火灾工程实例中。结合工程实例中,本文主要做了以下内容： (1)针对火灾后桥梁结构受损情况,本文应用多种检测方法进行现场检测,取得了较多的现场实测数据,为后续的损伤判断提供了相应的数据基础； (2)综合火灾现场调查和检测结果,通过分析,得到了相应构件的损伤评级； (3)总结了现有的火灾维修加固方法,并结合本工程的构件损伤实际情况,给出了了合理的维修加固建议。
[Abstract]:Fire is the main form of disaster that threatens public safety, which brings great losses to the country and people every year. At present, the research on structural damage assessment and identification after fire is not enough, and the theoretical research on the durability and seismic performance of building structures after fire is not deep enough. In the actual work of engineering inspection and evaluation, Often, the detection methods are not suitable for the complexity of fire damage, which makes the damage assessment and identification after fire too simple and incomplete. Therefore, it is of great significance to detect and identify the damage degree of building structure after fire and to study the corresponding repair scheme. On the basis of the existing research results, this paper summarizes some commonly used detection methods and methods, such as visual method, springback method, ultrasonic method, core drilling method and so on, and analyzes their advantages, disadvantages and application scope. Finally, the above theoretical research results are applied to fire engineering examples. Combined with the engineering example, the main contents of this paper are as follows: (1) in view of the damage of bridge structure after fire, this paper applies a variety of detection methods to carry out field detection, and obtains more field measured data. It provides the corresponding data basis for the subsequent damage judgment. (2) based on the results of fire site investigation and detection, the damage rating of the corresponding components is obtained through analysis; (3) the existing fire maintenance and reinforcement methods are summarized, and the reasonable suggestions of maintenance and reinforcement are given according to the actual situation of component damage in this project.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443.22;U446

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