發(fā)布時(shí)間：2018-02-16 00:16

  本文關(guān)鍵詞： 鋼管混凝土拱橋 評(píng)估方法 評(píng)估系統(tǒng) 權(quán)重 評(píng)語(yǔ)　出處：《長(zhǎng)安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：鋼管混凝土拱橋近些年來(lái)在我國(guó)交通領(lǐng)域發(fā)展受到了越來(lái)越多橋梁設(shè)計(jì)師的青睞。這不僅僅是因?yàn)樗脑煨蛢?yōu)美，還有諸多其它方面的優(yōu)點(diǎn)，目前它在交通領(lǐng)域占據(jù)了重要地位。鋼管混凝土拱橋伴隨運(yùn)營(yíng)時(shí)間的增長(zhǎng)，橋梁自身構(gòu)件或多或少的出現(xiàn)了病害，這些病害如果不能及時(shí)發(fā)現(xiàn)，病害繼而擴(kuò)展就有可能引起重大的工程事故。目前，國(guó)外很多的大型橋梁都建立了比較完善的健康監(jiān)測(cè)系統(tǒng)，而在國(guó)內(nèi)交通行業(yè)大發(fā)展的背景下，行業(yè)人員也很重視橋梁的健康檢測(cè)，并且越來(lái)越多的實(shí)踐到了一些大型橋梁上。這種系統(tǒng)能夠比較及時(shí)、有效的發(fā)現(xiàn)橋梁結(jié)構(gòu)的病害，并且針對(duì)損害狀況迅速的做出相應(yīng)處治措施。本文將以一座大跨徑鋼管混凝土拱橋?yàn)橐劳泄こ蹋芯糠治隽虽摴芑炷凉皹蚪】当O(jiān)測(cè)方面的幾個(gè)問題。主要的研究工作及成果包括如下幾個(gè)方面： （1）鋼管混凝土拱橋基于綜合評(píng)估法的安全跟蹤評(píng)估方法。從鋼管混凝土拱橋運(yùn)營(yíng)狀態(tài)健康監(jiān)測(cè)的內(nèi)容，常見的評(píng)估方法，以及橋梁自身結(jié)構(gòu)受力特點(diǎn)，優(yōu)選出基于綜合評(píng)估法的安全跟蹤評(píng)估方法合適的健康監(jiān)測(cè)方案，著重介紹了層次分析法和變權(quán)原理； （2）鋼管混凝土拱橋安全跟蹤評(píng)估系統(tǒng)的建立。從評(píng)估系統(tǒng)系統(tǒng)設(shè)計(jì)準(zhǔn)則出發(fā)，選出鋼管混凝土拱橋的評(píng)估項(xiàng)目，完成評(píng)估測(cè)點(diǎn)的布設(shè)，簡(jiǎn)述評(píng)估數(shù)據(jù)的采集，以及評(píng)估的準(zhǔn)則。 （3）以滹沱河特大橋工程實(shí)例建立安全跟蹤評(píng)估系統(tǒng)。從橋梁結(jié)構(gòu)的幾何形態(tài)布設(shè)，橋梁結(jié)構(gòu)應(yīng)力測(cè)試截面及測(cè)點(diǎn)布設(shè)，拱座和主墩、系梁應(yīng)變計(jì)的埋設(shè)及布置，主、邊拱肋和橫撐應(yīng)變計(jì)的埋設(shè)及布置，外包段、立柱和縱橫梁應(yīng)變計(jì)的埋設(shè)及布置，以及吊桿應(yīng)力狀態(tài)監(jiān)測(cè)等方面詳細(xì)介紹監(jiān)測(cè)系統(tǒng)的建立要點(diǎn)，以及后期的數(shù)據(jù)采集。具體的示范了安全跟蹤評(píng)估系統(tǒng)的建立。 （4）滹沱河特大橋安全評(píng)估計(jì)算分析。在滹沱河特大橋安全跟蹤評(píng)估中，經(jīng)過(guò)結(jié)構(gòu)層次體系的劃分及建立、并確定各個(gè)層次的初始權(quán)重，，以及監(jiān)測(cè)測(cè)點(diǎn)權(quán)重值的計(jì)算；又從大橋的應(yīng)力指標(biāo)評(píng)語(yǔ)、拱體系截面測(cè)點(diǎn)評(píng)語(yǔ)、吊桿索力評(píng)語(yǔ)、結(jié)構(gòu)幾何形態(tài)參數(shù)指標(biāo)評(píng)語(yǔ)四方面進(jìn)行指標(biāo)層評(píng)語(yǔ)的確定后。進(jìn)行變權(quán)綜合法評(píng)估計(jì)算，得出滹沱河特大橋結(jié)構(gòu)等級(jí)為一類的結(jié)論。
[Abstract]:In recent years, concrete-filled steel tubular arch bridges have attracted more and more attention from bridge designers in the field of transportation in China. This is not only because of its beautiful shape, but also because of its many other advantages. At present, it occupies an important position in the field of transportation. With the increase of operation time of CFST arch bridge, there are more or less defects of its own components, if these diseases can not be found in time, At present, many large bridges in foreign countries have established relatively perfect health monitoring systems, and in the context of the great development of the domestic transportation industry, Industry personnel also attach great importance to bridge health detection, and more and more practice on some large bridges. This system can be relatively timely, effective detection of bridge structure diseases, And to deal with the damage quickly, this paper will rely on a long-span concrete-filled steel tube arch bridge. Several problems in health monitoring of concrete-filled steel tubular arch bridge are studied and analyzed. The main research work and results include the following aspects:. 1) the safety tracking evaluation method of CFST arch bridge based on comprehensive evaluation method. The contents of health monitoring of CFST arch bridge, the common evaluation methods, and the structural characteristics of the bridge are discussed. The suitable health monitoring scheme based on comprehensive assessment method is selected, and the analytic hierarchy process (AHP) and the principle of variable weight are emphatically introduced. Based on the design criteria of the evaluation system, the evaluation project of the concrete filled steel tubular arch bridge is selected, and the layout of the evaluation measuring points is completed. The collection of the evaluation data and the evaluation criteria are briefly described. The safety tracking and evaluation system is established with the example of Hutuo River Bridge Project. From the geometric configuration of the bridge structure, the layout of the stress test section and measuring points of the bridge structure, the embedding and arrangement of the arch seat and the main pier, the strain gauge of the tie beam, the main, The installation and arrangement of the side arch rib and transverse bracing strain gauge, the outlay section, the embedding and arrangement of the vertical and horizontal beam strain gauge, and the monitoring of the stress state of the suspender are introduced in detail, and the main points of establishing the monitoring system are introduced in detail. And later data acquisition. The concrete demonstration of the establishment of a security tracking and evaluation system. 4) calculation and analysis of safety assessment of Hutuo River Bridge. In the safety tracking evaluation of Hutuo River Bridge, the structure hierarchy system is divided and established, the initial weight of each level is determined, and the weight value of monitoring point is calculated. After the evaluation of the stress index of the bridge, the evaluation of the section of the arch system, the evaluation of the cable force of the hoisting rod and the evaluation of the index of the geometric and morphological parameters of the structure, the evaluation calculation of the index layer is carried out by using the variable weight synthesis method. It is concluded that the structure grade of Hutuo River Bridge is one class.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U447

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