本文選題：斜拉橋拉索 + 水密度��； 參考：《南京理工大學(xué)》2014年碩士論文

【摘要】：在各類斜拉橋中斜拉索起著非常重要的作用,這些斜拉索的主要特點(diǎn)：承重強(qiáng),易疲勞,而它的腐蝕疲勞斷裂是斜拉索換索的主要原因。鋼絲受到腐蝕普遍又是水和水汽侵入造成,使得多根鋼絲因水的腐蝕疲勞而斷裂。因此,從某種意義上講,保證拉索不受水腐蝕或檢測出受腐蝕程度并及時(shí)改善是非常必要的。密水性能的試驗(yàn)?zāi)康脑谟诖_定任何水滴都無法穿透錨具自身的防腐及防水措施,在機(jī)械和溫度效應(yīng)加速老化下能正常運(yùn)作。本文主要討論了大橋中斜拉索工作時(shí)在不利條件和環(huán)境下容易腐蝕的問題。在研究國內(nèi)外相關(guān)文獻(xiàn)的基礎(chǔ)上,提出斜拉索水密度疲勞的試驗(yàn)方法,確定疲勞試驗(yàn)的一些參數(shù),采用了西門子PLC程序并與國內(nèi)外規(guī)范的相關(guān)規(guī)定作比較。本文的主要內(nèi)容包括：(1)介紹研究背景、意義及國內(nèi)外現(xiàn)狀；(2)介紹本文測試系統(tǒng)的主要組成部分,結(jié)合測試系統(tǒng)的電氣控制原理詳述了要用到的西門子PLC結(jié)構(gòu)與特點(diǎn)；(3)試驗(yàn)前的準(zhǔn)備工作,機(jī)械及溫度的老化要求,介紹電氣部分的組成和一些試驗(yàn)參數(shù)的設(shè)置；(4)測試系統(tǒng)的試驗(yàn),包括試驗(yàn)步驟,試件描述和試驗(yàn)程序,后期數(shù)據(jù)整理得出的一些表格和曲線及可能出現(xiàn)的故障等；(5)總結(jié)本測試系統(tǒng)的試驗(yàn)結(jié)果并進(jìn)行了展望,試驗(yàn)證明了在模擬人工老化作用(機(jī)械及溫度因素)下,無任何水漬進(jìn)入斜索錨具內(nèi)部。
[Abstract]:Cable-stayed cables play a very important role in all kinds of cable-stayed bridges. The main characteristics of these cable-stayed cables are strong bearing and easy to fatigue, and its corrosion fatigue fracture is the main cause of cable change. The corrosion of steel wire is caused by water and water vapor intrusion, which causes the multiple steel wire to break because of the corrosion fatigue of water. Therefore, it is of some significance. It is necessary to ensure that the cable is not corroded by water or to detect the degree of corrosion and to improve it in time. The purpose of the experiment is to determine that any water droplet can not penetrate the anchorage's own anticorrosion and waterproof measures, and can be transported normally under the accelerated aging of mechanical and temperature effects. This paper mainly discusses the work of the cable work in the bridge. On the basis of studying the relevant literature at home and abroad, the test method of water density fatigue of cable stayed cable was put forward, some parameters of fatigue test were determined, and the SIEMENS PLC program was adopted and compared with the relevant regulations at home and abroad. The main contents of this paper include: (1) introducing the research background The significance and the present situation at home and abroad; (2) introducing the main components of the test system, and combining the electrical control principle of the test system, the structure and characteristics of the SIEMENS PLC are described in detail. (3) the preparation work before the test, the requirements of the mechanical and temperature aging, the composition of the electrical part and the setting of some experimental parameters; (4) the test system. The experiment of the series, including test steps, specimen description and test procedures, some forms and curves and possible failures in the later data arrangement, and so on. (5) the results of the test system are summarized and the prospect is made. The test proves that no water stains enter the cable anchorage under the simulated artificial aging effect (mechanical and temperature factors). Inside.
【學(xué)位授予單位】：南京理工大學(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：1899733