本文選題：鋼結(jié)構(gòu)斜拉橋　切入點(diǎn)：人工檢查　出處：《東南大學(xué)》2017年博士論文

【摘要】：為確保大跨徑斜拉橋的安全性、適用性和耐久性,對(duì)其建立科學(xué)合理的評(píng)估體系是十分必要和緊迫的。目前,斜拉橋的評(píng)估來(lái)源于以人工檢查為主的橋梁養(yǎng)護(hù)管理系統(tǒng)和以傳感器監(jiān)測(cè)為主的橋梁長(zhǎng)期監(jiān)測(cè)系統(tǒng),而它們都有各自的弊端,難以獨(dú)立成為橋梁狀態(tài)評(píng)估的理想數(shù)據(jù)源。鑒于此,本文將多源信息融合的方法用于鋼結(jié)構(gòu)斜拉橋的狀態(tài)評(píng)估中,綜合篩選、整合兩大系統(tǒng)得到的數(shù)據(jù)及信息,以期獲得更具一致性、可靠性的評(píng)估結(jié)果,為橋梁運(yùn)營(yíng)管理提供更為科學(xué)合理的養(yǎng)護(hù)方案及決策依據(jù)。本文的主要研究?jī)?nèi)容如下:(1)斜拉橋信息融合模型研究。為描述評(píng)估系統(tǒng)中各組件的功能、相互關(guān)系以及數(shù)據(jù)流向,本文融合養(yǎng)護(hù)管理系統(tǒng)和長(zhǎng)期監(jiān)測(cè)系統(tǒng)的數(shù)據(jù)信息,對(duì)斜拉橋狀態(tài)評(píng)估系統(tǒng)中的信息融合功能模型和體系結(jié)構(gòu)做相應(yīng)的設(shè)計(jì),然后對(duì)信息融合與評(píng)估的關(guān)聯(lián)性進(jìn)行對(duì)應(yīng)解釋,最后歸納了目前鋼結(jié)構(gòu)斜拉橋中兩類數(shù)據(jù)源的現(xiàn)狀,為后續(xù)的數(shù)據(jù)融合與評(píng)估奠定基礎(chǔ)。(2)數(shù)據(jù)的多源融合方法研究。針對(duì)橋梁長(zhǎng)期監(jiān)測(cè)系統(tǒng)中的海量待處理數(shù)據(jù),提出數(shù)據(jù)的自校融合、互校融合方法,并形成一種帶反饋機(jī)制的監(jiān)測(cè)數(shù)據(jù)處理流程,以實(shí)例驗(yàn)證融合方法的實(shí)用性。通過(guò)有限元模型修正和考慮分布統(tǒng)計(jì)方法的環(huán)境荷載剔除,對(duì)數(shù)據(jù)進(jìn)行特征抽取,以得到評(píng)估基準(zhǔn)值。用索力和撓度的實(shí)例說(shuō)明方法的可行性。(3)數(shù)據(jù)融合后的進(jìn)一步應(yīng)用研究。給出了三種應(yīng)用范例,第一種用于溫度作用類型的驗(yàn)證,以某橋?yàn)槔?分析其不同溫度作用;第二種應(yīng)用于監(jiān)測(cè)數(shù)據(jù)的溫度效應(yīng)分析,分析了某橋的索力和撓度的溫度效應(yīng);第三種應(yīng)用于撓度預(yù)警,基于選定監(jiān)測(cè)數(shù)據(jù)的一定保證率建立橋梁跨中撓度預(yù)警線,以某橋2008年雪災(zāi)前后狀況和交通量增長(zhǎng)情況兩個(gè)示例進(jìn)行檢驗(yàn)。(4)確定指標(biāo)體系和相應(yīng)評(píng)定標(biāo)準(zhǔn)。根據(jù)一定的指標(biāo)選取原則和層次架構(gòu)方式,建立鋼結(jié)構(gòu)斜拉橋指標(biāo)體系。檢測(cè)指標(biāo)的評(píng)定標(biāo)準(zhǔn)分成三類:定性指標(biāo),定量指標(biāo)以及序列指標(biāo)。對(duì)于定性指標(biāo),提出考慮細(xì)化維度的描述,基于統(tǒng)計(jì)的量化評(píng)定方法;對(duì)于定量指標(biāo),采用基于規(guī)范的線段模型,并提出多源檢測(cè)項(xiàng)的融合方法,包括二維融合,合并以及增補(bǔ)參數(shù)等;對(duì)于序列指標(biāo),采用基于灰色關(guān)聯(lián)度法的綜合評(píng)估。(5)基于層次分析法的斜拉橋狀態(tài)評(píng)估方法研究。根據(jù)一定準(zhǔn)則選擇合適的標(biāo)度,權(quán)重的確定采用基于模糊聚類的群組權(quán)重計(jì)算方法;基于現(xiàn)行公路橋梁技術(shù)狀況評(píng)定標(biāo)準(zhǔn),通過(guò)改進(jìn)的單個(gè)構(gòu)件得分計(jì)算方法和新的構(gòu)件數(shù)量劃分方法,得到一種基于層次分析法的改進(jìn)評(píng)估方法。考慮到傳統(tǒng)加權(quán)計(jì)算方式易掩蓋子指標(biāo)之間評(píng)分差異大的狀況,引入可信度概念,建立了基于證據(jù)融合的橋梁多指標(biāo)綜合評(píng)估模型。以某橋的定期檢查結(jié)果為例,驗(yàn)證兩個(gè)方法的適用性。(6)開(kāi)發(fā)了斜拉橋綜合評(píng)估軟件系統(tǒng)。數(shù)據(jù)庫(kù)采用MYSQL,網(wǎng)絡(luò)模式為B/S架構(gòu)方式,它是一個(gè)集數(shù)據(jù)庫(kù)管理、數(shù)據(jù)處理、檢查監(jiān)測(cè)、綜合評(píng)估、病害診斷、維修管理、打印與幫助等多種功能為一體的綜合性橋梁養(yǎng)護(hù)管理系統(tǒng)。以三座斜拉橋的八年檢查記錄為算例,驗(yàn)證評(píng)估方法和軟件運(yùn)行的正確性。
[Abstract]:In order to ensure the safety of long-span cable-stayed bridges, applicability and durability, establishing a scientific and reasonable evaluation system of it is very necessary and urgent. At present, the cable-stayed bridge assessment from the bridge maintenance management system based on artificial inspection and monitoring based on sensor bridge long-term monitoring system, and they are have their own shortcomings, to become independent ideal data source bridge condition assessment. In view of this, the method of multi-source information fusion for condition assessment of steel cable-stayed bridge, a comprehensive screening, data and information integration of the two systems, in order to obtain more consistency, reliability evaluation results for bridge management and maintenance scheme to provide more scientific and reasonable decision-making basis. The main contents of this paper are as follows: (1) research on fusion model of cable-stayed bridge. All components of the functional description of evaluation system, interaction The Department and the data flow, this paper integrated maintenance management system and long-term monitoring of the data information of the system of cable-stayed bridge condition assessment system in information fusion function model and system structure of corresponding design, then the corresponding interpretation of relevance and evaluation of information fusion, the summed up in two types of current steel cable-stayed structure the bridge in the data source for the fusion and lay the foundation for the assessment and follow-up data. (2) research on data fusion of multi source. For long-term monitoring system of bridge in huge amounts of data to be processed, the self calibration of the fusion data fusion method, each school, and the formation of a feedback mechanism for monitoring data processing, to examples verify the practicality fusion method. Through finite element model updating and considering the environmental load distribution excluding statistical methods, feature extraction of data, to obtain the benchmark value. With the cable force and deflection Examples illustrate the feasibility of the method. (3) further research and application of data fusion are proposed. Three kinds of application examples, the first type is used to verify the temperature effect, taking a bridge as an example, analyzes the different temperature effect; temperature effect analysis of second kinds of application in monitoring data, analysis of the cable force and deflection temperature the effect of a bridge; the third used in deflection warning, ensure the selected monitoring data rate to establish early warning line span bridge deflection based on the condition and traffic volume of a bridge before and after the snowstorm in 2008 growth two sample test. (4) to determine the index system and the corresponding evaluation criteria. According to the selection principle and architecture a certain index, build steel cable-stayed bridge. The index system of evaluation indexes are divided into three types: qualitative index, quantitative index and index sequence. For qualitative indicators, the fine description of dimensions to consider The quantitative evaluation method based on statistics; for quantitative indicators, using line model based on the standard, and puts forward the fusion method of multi-source detection, including two-dimensional fusion, merging and supplementary parameters; for the series index, using comprehensive evaluation method of gray correlation estimation. (5) based on the evaluation method of the cable-stayed bridge state based on the analytic hierarchy process. Select the appropriate scale according to certain criteria, the weights are determined by the calculation method of group weights based on fuzzy clustering; the current highway bridge technical condition evaluation based on the standard, through the improved single component score calculation method and a new component number partitioning method, we get an improved evaluation method of AHP based on the traditional calculation method considering the weighted score between the situation easily cover lid between indicators, introducing a concept of reliability, established evidence fusion bridge based on multi index comprehensive Evaluation model. To periodically check the results of a bridge as an example, verify the applicability of two methods. (6) the development of cable-stayed bridge comprehensive evaluation software system. Using MYSQL database, network model for B/S architecture, it is a set of database management, data processing, monitoring inspection, comprehensive appraisal, disease the diagnosis, maintenance management, functions of printing and help the comprehensive development of bridge maintenance management system. The three cable-stayed bridge eight years inspection record as an example to validate the correctness of the evaluation method and software operation.

【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2017
【分類號(hào)】：U448.27

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