本文選題：碳纖維板 + 波形錨��； 參考：《重慶交通大學(xué)》2015年碩士論文

【摘要】：橋梁作為基礎(chǔ)設(shè)施的重要組成部分,是交通運輸?shù)难屎?起著舉足輕重的作用。由于設(shè)計、施工、管理、養(yǎng)護等方面的不足,橋梁維修與加固越來越成為全世界共同面臨的一個問題,在發(fā)展中國家尤為突出。預(yù)應(yīng)力碳纖維板技術(shù)由于兼具預(yù)應(yīng)力技術(shù)和粘貼加固技術(shù)的雙重優(yōu)勢,已經(jīng)成為加固領(lǐng)域的研究熱點,并在工程實踐中得到了越來越多的應(yīng)用。然而,目前市場上碳纖維板的規(guī)格較多,厚度有1.2mm、1.4mm、2mm、3mm、4mm,寬度從30mm到200mm,等等多種規(guī)格和種類。不同的碳纖維板厚度,對結(jié)構(gòu)加固的性能是不一樣的,特別是厚度不同對粘結(jié)性能的影響,到目前為止,還是一個研究空白。為此,本研究團隊設(shè)計了三組不同厚度碳纖維板加固大尺寸T梁的加固試驗進行對比研究,第一組A0為未加固梁,第二組A2為2mm×50mm(厚×寬)碳纖維板加固,第三組A3為3mm×50mm(厚×寬)碳纖維板加固。通過對試驗過程和結(jié)果進行分析,并進行理論推導(dǎo),得出以下結(jié)論:①無論是2mm碳板還是3mm碳板都顯著的提高了鋼筋混凝土梁的整體抗彎性能,包括:開裂彎矩、屈服彎矩、最大承載能力。②就單層預(yù)應(yīng)力碳纖維板加固而言,2mm和3mm碳纖維板在整個試驗過程中都能與原結(jié)構(gòu)很好的共同工作,未出現(xiàn)厚碳纖維板先于薄板剝離的現(xiàn)象。③預(yù)應(yīng)力碳纖維板加固鋼筋混凝土梁,可以改變其抗彎剛度,延緩中和軸上升,使得同等荷載作用下的跨中撓度相對于對比梁有所減小,并使得裂縫發(fā)展有所延緩,同時,隨著碳板厚度的增加,減小或延緩程度有增加的趨勢。④理論研究表明,預(yù)應(yīng)力碳纖維板加固后的梁,可將受彎構(gòu)件正截面破壞劃分為三種不同的形式:少筋破壞、適筋破壞、超筋破壞,加固量較大,將出現(xiàn)超筋破壞,加固效率降低,在加固設(shè)計中應(yīng)盡量避免。本文對不同厚度碳纖維板加固的構(gòu)件的試驗成果和理論進行研究,結(jié)論對預(yù)應(yīng)力碳纖維板加固設(shè)計具有指導(dǎo)意義。
[Abstract]:As an important part of infrastructure, bridge is the throat of transportation and plays an important role. Due to the deficiency of design, construction, management and maintenance, bridge maintenance and reinforcement have become a common problem all over the world, especially in developing countries. The technology of prestressed carbon fiber sheet has become a hot spot in the field of reinforcement because of its dual advantages of both prestressing technology and bonding and strengthening technology, and has been applied more and more in engineering practice. However, there are many specifications of CFRP in the market at present, with a thickness of 1.2mm / 1.4mm / 2mm / 3mm / 4mm, width from 30mm to 200mm, and so on. The effect of different thickness of CFRP on structural strengthening performance is different, especially the influence of different thickness on bond performance, so far, there is still a blank in the study. Therefore, this research team designed three groups of different thickness carbon fiber sheet to strengthen the large size T beam to carry on the contrast research, the first group A0 is the unstrengthened beam, the second group A2 is the 2mm 脳 50mm (thickness 脳 width) carbon fiber plate reinforcement, the second group is the 2mm 脳 50mm (thickness 脳 width) carbon fiber plate reinforcement. The third group A 3 is 3mm 脳 50 mm (thick 脳 wide) carbon fiber sheet reinforcement. Through the analysis of the test process and results, and the theoretical derivation, the following conclusions are drawn: both the 2mm carbon plate and the 3mm carbon plate can significantly improve the overall flexural behavior of the reinforced concrete beam, including: cracking moment, yield moment, The maximum bearing capacity of 2 mm and 3mm carbon fiber sheet can work well with the original structure during the whole experiment. The phenomenon that thick carbon fiber slab is not peeled off before thin plate... The bending stiffness of reinforced concrete beam strengthened by prestressed carbon fiber slab can be changed, and the rise of neutral axis can be delayed. Under the same load, the mid-span deflection is reduced relative to the contrast beam, and the crack development is retarded. At the same time, with the increase of carbon plate thickness, the decreasing or delaying degree is increasing. The beam strengthened with prestressed carbon fiber slab can be divided into three different types: the failure of less reinforcement, the failure of suitable reinforcement, the failure of overreinforcement, the large amount of reinforcement, and the decrease of reinforcement efficiency. The reinforcement design should be avoided as far as possible. In this paper, the experimental results and theory of different thickness CFRP strengthened members are studied, and the conclusion is of guiding significance for the design of prestressed CFRP plates.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U445.72

【參考文獻】

相關(guān)期刊論文 前7條

1 曾攀;沙吾列提·拜開依;葉列平;黃繼榮;;預(yù)應(yīng)力CFRP布加固混凝土梁的受彎承載力分析[J];廣東建材;2006年03期

2 余丹如;國內(nèi)外公路、橋梁建設(shè)的現(xiàn)狀與發(fā)展[J];國外公路;1994年01期

3 李慶偉;楊勇新;岳清瑞;陳龍華;張清海;;預(yù)應(yīng)力碳纖維布加固混凝土梁錨固方式試驗研究[J];工業(yè)建筑;2006年04期

4 姜潤喜;;碳纖維的發(fā)展現(xiàn)狀[J];合成技術(shù)及應(yīng)用;2010年01期

5 喻永華;孫緒鋒;李承光;;淺談橋梁加固[J];北方交通;2008年07期

6 國莉;;橋梁加固的研究現(xiàn)狀及發(fā)展[J];交通世界(建養(yǎng).機械);2012年05期

7 孫建東;高峰;;橋梁下部結(jié)構(gòu)的加固與改造[J];四川建筑;2008年02期

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本文編號：1804395