發(fā)布時(shí)間：2018-05-09 07:18

  本文選題：可拓學(xué) + 橋梁可靠性評價(jià)　； 參考：《沈陽建筑大學(xué)》2014年碩士論文

【摘要】：本文闡述了目前關(guān)于國內(nèi)外橋梁檢測方法與評估成果,并在對鋼筋混凝土梁橋的一些常見病害進(jìn)行機(jī)理分析,在此基礎(chǔ)上對既有橋梁工作狀態(tài)和可靠性進(jìn)行了進(jìn)一步研究。首先對目前橋梁評估方法研究的現(xiàn)狀進(jìn)行了系統(tǒng)介紹和歸納總結(jié)；其次論述了AHP法和可拓學(xué)評價(jià)的基本原理及其在橋梁狀態(tài)評估中的應(yīng)用,拓展了可拓理論的應(yīng)用領(lǐng)域,并為鋼筋混凝土梁橋結(jié)構(gòu)可靠性評估提供了新的方法；再次根據(jù)混凝土簡支梁橋的結(jié)構(gòu)特點(diǎn)來劃分橋梁系統(tǒng),從橋梁可靠性的三個(gè)方面建立評估的層次結(jié)構(gòu)模型。在此基礎(chǔ)上,提出了各指標(biāo)權(quán)重的確定方法,并結(jié)合現(xiàn)有資料及相關(guān)規(guī)范,討論并確定出各底層指標(biāo)評估的待評物元；最后,結(jié)合實(shí)際工程應(yīng)用可拓評價(jià)原理進(jìn)行系統(tǒng)的評價(jià)。本文將可拓學(xué)理論與橋梁可靠性評價(jià)相結(jié)合,基于可拓集合論、物元理論、以及關(guān)聯(lián)函數(shù)的運(yùn)算,進(jìn)而建立梁橋的可靠性評價(jià)的可拓學(xué)模型。通過對營口民興河橋進(jìn)行橋梁檢測,以及把調(diào)查的資料進(jìn)行收集與整理之后,從而掌握了能夠影響該橋的可靠性指標(biāo)的相應(yīng)特征。通過考慮橋梁的可靠性評價(jià)影響因素的復(fù)雜性與多樣性,通過橋梁狀態(tài)評定的角度出發(fā),我們進(jìn)而選取了能夠反映民興河橋的可靠性參數(shù)進(jìn)行評價(jià)。對橋梁狀態(tài)評定等級的相應(yīng)關(guān)聯(lián)度進(jìn)行計(jì)算,對營口民興河橋的橋梁可靠性狀態(tài)進(jìn)行了相應(yīng)的可拓學(xué)評價(jià),并且把評價(jià)的結(jié)果和其它的評價(jià)方法對比起來,進(jìn)行分析,綜合得出可拓學(xué)評價(jià)結(jié)果能夠較完善、準(zhǔn)確的反映營口民興河橋的橋梁可靠性狀態(tài)的結(jié)論,從而為橋梁病害防治與維修加固提供參考和理論依據(jù)。
[Abstract]:In this paper, the detection methods and evaluation results of bridges at home and abroad are described, and the mechanism of some common diseases of reinforced concrete beam bridges is analyzed. On this basis, the working state and reliability of existing bridges are further studied. Firstly, the paper systematically introduces and summarizes the current research status of bridge evaluation methods, and then discusses the basic principles of AHP method and extension evaluation and its application in bridge state evaluation, which expands the application field of extension theory. It also provides a new method for reliability evaluation of reinforced concrete beam bridge, and then divides the bridge system according to the structural characteristics of concrete simply supported beam bridge, and establishes the hierarchical structure model from three aspects of bridge reliability evaluation. On this basis, the method of determining the weights of each index is put forward, and the evaluation elements of each underlying index are discussed and determined according to the existing data and relevant norms. Finally, the system evaluation is carried out with the application of extension evaluation principle in practical engineering. In this paper, the extension theory is combined with the bridge reliability evaluation, and based on the extension set theory, matter-element theory and the operation of the correlation function, the extension model of the reliability evaluation of the beam bridge is established. Through the bridge detection of Yingkou Minxing River Bridge and the collection and arrangement of the investigation data, the corresponding characteristics which can affect the reliability index of the bridge are grasped. By considering the complexity and diversity of the factors influencing the reliability evaluation of the bridge, and from the point of view of the bridge state evaluation, we select the reliability parameters which can reflect the Minxing River Bridge for evaluation. The corresponding correlation degree of the evaluation grade of bridge state is calculated, and the reliability of the bridge of Minxing River Bridge in Yingkou is evaluated by extension. The results of evaluation are compared with other evaluation methods, and the results are analyzed. It is concluded that the evaluation results of extenics can be perfect and can accurately reflect the reliability state of the bridge of Yingkou Minxing River Bridge, thus providing a reference and theoretical basis for the prevention and treatment of bridge diseases and the maintenance and reinforcement of the bridge.
【學(xué)位授予單位】：沈陽建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U446

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本文編號：1865090