重大水工混凝土结构健康诊断综合分析理论和方法
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摘要
重大水工混凝土结构的健康是关系到工程安全的大事,因此研究诊断重大水工混凝土结构健康状况的方法有重要的理论意义和实用价值。本文以混凝土坝为主要研究对象,应用层次分析、属性识别等理论,结合坝工理论知识,对重大水工混凝土结构的健康诊断方法、综合诊断结构体系、诊断指标度量方法以及综合诊断方法等方面进行了分析研究。主要研究内容如下:
     1、研究和分析了重大水工混凝土结构健康诊断方法,并重点对数学监控模型法进行了探讨,建立了较优的健康诊断模型。
     2、给出了拟定重大水工混凝土结构健康综合诊断结构体系中诊断指标的六条原则;探讨了重大水工混凝土结构健康综合诊断结构体系的建立方法,并对体系中的健康评价集的设计进行了深入研究,确定了健康等级的四级划分法。
     3、建立了“健康值”概念,使得对不同指标的评价有统一的含义;研究了定量和定性诊断指标进行初始数据标准化的方法,基本解决了由于健康综合诊断结构体系中的诊断指标在表述方法、取值范围、度量方法和度量单位各不相同造成的同层诊断指标之间相互比较困难的问题。
     4、通过对已有权重确定方法的研究比较,将确定权重的乘积标度法应用于重大水工混凝土结构的健康诊断;同时基于最优化准则,建立了诊断指标融合权重的确定方法。
     5、结合重大水工混凝土结构健康综合诊断多层次递归分析的特点,应用属性识别理论,建立了重大水工混凝土结构健康综合诊断模型。
Because the health of large hydraulic engineering concrete structure is an important thing that is related with engineering's safety, it has important theoretical meaning and practical value to research the method of diagnosing the healthy condition of the large hydraulic engineering concrete structure. Concrete dam is regard as main researching object in this dissertation. The knowledge, such as analytic hierarchy process, attribute recognition, together with the knowledge of dam engineering, are introduced into the dissertation, which performs relatively detailed study on method of health diagnosis, comprehensive diagnosis structure system, method of measuring diagnostic index and method of comprehensive diagnosis of the large hydraulic engineering concrete structure. The main contents are as follows.
    1. Methods of the health diagnosis of the large hydraulic engineering concrete structure are studied and analyzed. Discuss of mathematical monitoring models are given in detail, and better health diagnosis models are founded.
    2. Six rules of studying out the diagnostic index of comprehensive health diagnosis structure system of the large hydraulic engineering concrete structure are given. The method of founding the comprehensive health diagnosis structure system of the large hydraulic engineering concrete structure is discussed, and the design of healthy appraising aggregation of the system is lucubrated. The fourth-class divisional method of healthy grade is ascertained.
    3. The conception of healthy value is founded, which can make the appraisements of different indexes having uniform signification. The methods of standardizing original data for quantitative and qualitative diagnosis index are studied. By using these methods, the comparing difficulties between different diagnosis indexes at the same layer brought by the difference in expressive method, the scale of value, measuring method and units of diagnosis indexes of the comprehensive health diagnosis structure system of the large hydraulic engineering concrete structure is solved.
    4. Based on analyzing and comparing the existing methods of determining weight, multiplication scale method is used to the health diagnosis of the large hydraulic engineering concrete structure. And the method of calculating syncretic weight of diagnosis index is founded by using optimization guideline.
    5. According the characteristic of multi-level recursive analysis of comprehensive health diagnosis of the large hydraulic engineering concrete structure, model of comprehensive health diagnosis of the large hydraulic engineering concrete structure is founded by using attribute recognition theory.
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