發(fā)布時(shí)間：2018-04-17 21:47

  本文選題：鋼板—混凝土組合加固 + 橋梁加固��； 參考：《重慶交通大學(xué)》2015年碩士論文

【摘要】：如何快速有效得對(duì)受損橋梁進(jìn)行加固與維修,使其恢復(fù)使用能力是目前工程界較為關(guān)注的熱點(diǎn)之一。鋼板—混凝土組合加固是在鋼板上焊接栓釘、原結(jié)構(gòu)表面植筋,并向其澆注混凝土,使得原結(jié)構(gòu)與后加固部分形成整體共同受力的加固技術(shù)。本文設(shè)計(jì)了3組共7根鋼板—混凝土組合加固矩形梁,一方面在對(duì)原梁進(jìn)行加固前先預(yù)壓一定的初始荷載,使得原梁存在損傷的同時(shí)保持該初始荷載施加的情況下進(jìn)行組合加固,通過(guò)對(duì)比以研究二次受力作用下不同初始荷載對(duì)鋼板—混凝土組合加固矩形梁抗彎性能的影響。另一方面,為更好的解決片材加固中的剝離破壞問(wèn)題,本試驗(yàn)將在原梁進(jìn)行鋼板—混凝土組合抗彎加固的基礎(chǔ)上,提出在其端部進(jìn)行外包鋼板—混凝土組合加固,通過(guò)試驗(yàn)驗(yàn)證該方法的可行性以及其對(duì)剝離破壞的影響,更好得為實(shí)際工程加固中提供依據(jù)。試驗(yàn)過(guò)程中,觀察試驗(yàn)梁從加載到破壞的各階段現(xiàn)象,對(duì)其抗彎承載力、變形以及應(yīng)變結(jié)果進(jìn)行了詳細(xì)的分析。揭示了鋼板—混凝土組合加固矩形梁的受力狀況與破壞機(jī)理;同時(shí),對(duì)比理論計(jì)算值,驗(yàn)證了組合加固的有效性。
[Abstract]:How to reinforce and maintain the damaged bridge quickly and effectively is one of the hotspots in the engineering field.Steel plate and concrete composite reinforcement is a kind of strengthening technology, which is welding bolt on steel plate, planting reinforcement on the surface of the original structure, and pouring concrete to it, which makes the original structure and the post-strengthened part form a common force together.In this paper, three groups of 7 steel plate concrete composite strengthened rectangular beams are designed. On the one hand, the initial load is preloaded before the original beam is strengthened.In order to study the effect of different initial loads on the flexural behavior of rectangular beams strengthened by steel plate and concrete, the damage of the original beam is maintained while the initial load is applied to the composite beam.On the other hand, in order to solve the problem of debonding and failure in the reinforcement of sheet metal better, this experiment will put forward the composite strengthening of steel plate and concrete at the end of the composite steel plate and concrete on the basis of the steel plate and concrete composite flexural strengthening of the original beam.The feasibility of the method and its influence on debonding failure are verified by experiments.In the course of the test, the phenomena of the test beam from loading to failure are observed, and the bending capacity, deformation and strain results of the test beam are analyzed in detail.The stress condition and failure mechanism of rectangular beams strengthened with steel plate and concrete are revealed, and the validity of composite reinforcement is verified by comparing the theoretical calculation values.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U446;U445.72

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本文編號(hào)：1765402