【摘要】：現(xiàn)階段預(yù)應(yīng)力CFRP加固技術(shù)應(yīng)用于危害橋梁加固工程中對(duì)于橋梁加固方法是一種極好的補(bǔ)充,改善了現(xiàn)有橋梁加固方法中的不足,采用預(yù)應(yīng)力CFRP加固技術(shù)可以增大橋梁的極限承載能力,改善橋梁的力學(xué)性能,抑制裂縫的開展,減小橋梁的撓度變形,提高碳纖維布的有效利用率。但是將此項(xiàng)橋梁加固技術(shù)很好的應(yīng)用于實(shí)際橋梁加固工程中存在著一定的問題,主要表現(xiàn)在碳纖維布預(yù)應(yīng)力張拉系統(tǒng)上(現(xiàn)有張拉設(shè)備和錨固裝置操作繁瑣、占用空間大、對(duì)橋梁本身的損害大等問題)及施工工藝上。本文在現(xiàn)有張拉系統(tǒng)的基礎(chǔ)和原理上,并結(jié)合碳纖維布本身的特點(diǎn),設(shè)計(jì)研發(fā)了一套新型張拉系統(tǒng);設(shè)計(jì)制作了 9根6m長的試驗(yàn)梁進(jìn)行了大比例尺試驗(yàn)研究,更接近于實(shí)際橋梁工程;其中采用本套新型張拉系統(tǒng)對(duì)8根試驗(yàn)梁進(jìn)行了預(yù)應(yīng)力碳纖維布加固,分別對(duì)8根試驗(yàn)梁進(jìn)行單層、雙層、三層碳纖維布粘貼加固;所施加的初始預(yù)應(yīng)力度分別為25%、50%和75%,并對(duì)8根試驗(yàn)梁采用機(jī)械錨固鋼板進(jìn)行錨固,對(duì)8根試驗(yàn)梁采用自制反力架進(jìn)行四點(diǎn)彎曲加載。試驗(yàn)結(jié)果表明采用新研發(fā)的碳纖維布張拉系統(tǒng)可以完成對(duì)碳纖維布施加設(shè)定大小的初始應(yīng)力,且設(shè)備安裝操作方便,施工效率高;預(yù)應(yīng)力CFRP及預(yù)緊螺栓聯(lián)合加固技術(shù)加固鋼筋混凝土梁可以有效的提高被加固梁極限承載能力,增大被加固梁的抗彎剛度,減小撓度變形,抑制裂縫的開展,使碳纖維布充分發(fā)揮了高強(qiáng)性能,改善橋梁的力學(xué)性能。通過對(duì)預(yù)應(yīng)力碳纖維布加固RC梁力學(xué)性能分析研究,本文通過理論計(jì)算和試驗(yàn)結(jié)果分析對(duì)比了極限承載力、撓度變形,理論計(jì)算與試驗(yàn)結(jié)果吻合較好,總結(jié)了預(yù)應(yīng)力碳纖維布及預(yù)緊螺栓聯(lián)合加固橋梁的受力機(jī)理。采用此項(xiàng)加固技術(shù)設(shè)計(jì)加固了濟(jì)菏高速G35線東平段的K137+128通道,效果顯著,總結(jié)出了依托于此套新型張拉系統(tǒng)的加固施工工藝。
[Abstract]:At present, the application of prestressed CFRP reinforcement technology in the construction of harmful bridge reinforcement is an excellent supplement to the bridge strengthening method, which improves the deficiency of the existing bridge reinforcement methods. The prestressed CFRP technique can increase the ultimate bearing capacity of the bridge, improve the mechanical properties of the bridge, restrain the crack development, reduce the deflection of the bridge, and improve the effective utilization ratio of the carbon fiber cloth. However, there are some problems in the application of the bridge reinforcement technology in the actual bridge strengthening project, which is mainly manifested in the prestressed tensioning system of carbon fiber cloth (the existing tension equipment and anchor device are complicated to operate and occupy a large space. Major damage to the bridge itself and other problems) and construction technology. In this paper, a new tensioning system is designed and developed on the basis and principle of the existing tensioning system and combining with the characteristics of the carbon fiber cloth itself. Design and manufacture of 9 6 m long test beams for large scale experimental research, more close to the actual bridge engineering; The new tension system was used to reinforce 8 test beams with prestressed carbon fiber sheets, and 8 test beams were strengthened with single layer, double layer and three layers of carbon fiber sheets respectively. The initial prestressing force applied is 25% and 75% respectively. 8 test beams are anchored by mechanical anchoring steel plate and 8 test beams are subjected to four point bending loading with self-made reaction frame. The test results show that the new carbon fiber tensioning system can apply the initial stress to the carbon fiber cloth, and the installation and operation of the equipment is convenient and the construction efficiency is high. The reinforced concrete beams strengthened with prestressed CFRP and prestressing bolts can effectively improve the ultimate bearing capacity of the strengthened beams, increase the flexural stiffness of the strengthened beams, reduce the deflection deformation, and restrain the crack development. The carbon fiber sheet can give full play to the high strength performance and improve the mechanical properties of the bridge. Through the analysis and study of mechanical properties of RC beams strengthened with prestressed carbon fiber sheets, the ultimate bearing capacity and deflection of RC beams are analyzed and compared by theoretical calculation and experimental results. The theoretical calculation is in good agreement with the experimental results. The stress mechanism of prestressed carbon fiber cloth and pre-tightening bolt is summarized. This reinforcement technique is used to design and reinforce the K137128 channel in Dongping section of Jihe High Speed G35 Line. The effect is remarkable, and the reinforcement construction technology based on this new tension system is summarized.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U445.72

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 錢遠(yuǎn)順;孫仁娟;劉傳波;李長旭;管延華;;預(yù)應(yīng)力CFRP雙層同時(shí)張拉系統(tǒng)加固工藝研究[J];混凝土與水泥制品;2016年08期

2 管延華;錢遠(yuǎn)順;岳紅亞;孫仁娟;紀(jì)續(xù);袁凱;劉傳波;;預(yù)應(yīng)力CFRP布及預(yù)緊螺栓加固RC梁試驗(yàn)研究[J];土木建筑與環(huán)境工程;2016年02期

3 蘇有文;詹妮;李超飛;馬倩雯;寥周先;張軍;;預(yù)應(yīng)力碳纖維布加固損傷鋼筋混凝土梁抗彎性能研究[J];施工技術(shù);2014年04期

4 李鳳蘭;侯維玲;肖文;曲福來;;預(yù)應(yīng)力CFRP加固銹蝕鋼筋混凝土梁試驗(yàn)研究[J];工程抗震與加固改造;2013年03期

5 唐紅元;潘毅;李力;萬里;楊虹;;預(yù)應(yīng)力CFRP加固混凝土梁的預(yù)應(yīng)力體系研究現(xiàn)狀[J];土木工程學(xué)報(bào);2013年S2期

6 高仲學(xué);王文煒;黃輝;;預(yù)應(yīng)力碳纖維布加固鋼筋混凝土梁抗彎承載力計(jì)算[J];東南大學(xué)學(xué)報(bào)(自然科學(xué)版);2013年01期

7 王文煒;戴建國;張磊;;后張預(yù)應(yīng)力碳纖維布加固鋼筋混凝土梁預(yù)應(yīng)力損失試驗(yàn)及計(jì)算方法研究[J];土木工程學(xué)報(bào);2012年11期

8 余瓊;張燕語;;預(yù)應(yīng)力碳纖維布加固鋼筋混凝土梁撓度研究[J];結(jié)構(gòu)工程師;2011年01期

9 黃竟強(qiáng);李東彬;趙基達(dá);徐福泉;;預(yù)應(yīng)力碳纖維板錨具試驗(yàn)研究[J];施工技術(shù);2010年02期

10 翟愛良;王東海;胡培穩(wěn);;預(yù)應(yīng)力碳纖維布加固無腹筋混凝土梁試驗(yàn)研究[J];水資源與水工程學(xué)報(bào);2009年05期

相關(guān)博士學(xué)位論文 前3條

1 錢偉;預(yù)應(yīng)力碳纖維布加固損傷混凝土梁的受力性能[D];鄭州大學(xué);2007年

2 栗青;FRP加固鋼筋混凝土梁/板的逐漸破壞和承載能力研究[D];東北大學(xué);2007年

3 田安國;預(yù)應(yīng)力FRP加固混凝土受彎構(gòu)件試驗(yàn)及設(shè)計(jì)理論研究[D];東南大學(xué);2006年

相關(guān)碩士學(xué)位論文 前10條

1 王龍威;預(yù)應(yīng)力FRP板加固RC梁橋結(jié)構(gòu)力學(xué)性能研究[D];浙江大學(xué);2014年

2 周柯靖;預(yù)應(yīng)力碳纖維布加固鋼筋混凝土梁受力性能分析及承載力計(jì)算[D];湘潭大學(xué);2014年

3 張慶濤;預(yù)應(yīng)力碳纖布加固梁試驗(yàn)和數(shù)值模擬分析[D];山東大學(xué);2013年

4 池紹進(jìn);體外預(yù)應(yīng)力CFRP加固混凝土薄壁箱梁抗彎性能試驗(yàn)及分析[D];湖南科技大學(xué);2012年

5 王天峰;預(yù)應(yīng)力CFRP布加固負(fù)載RC梁正截面受彎性能研究[D];東北林業(yè)大學(xué);2012年

6 呂淑娟;鋼筋混凝土梁錨粘鋼板加固方法研究[D];大連海事大學(xué);2010年

7 張偉;預(yù)應(yīng)力碳纖維布加固混凝土梁的理論分析與數(shù)值模擬[D];大連理工大學(xué);2010年

8 何利雄;碳纖維布體外預(yù)應(yīng)力自密實(shí)混凝土薄壁箱梁應(yīng)用研究[D];湖南科技大學(xué);2009年

9 柳志華;預(yù)應(yīng)力碳纖維布張拉裝置的設(shè)計(jì)[D];吉林大學(xué);2007年

10 葛凱;預(yù)應(yīng)力碳纖維布加固混凝土梁抗彎性能試驗(yàn)研究[D];鐵道部科學(xué)研究院;2006年

，

本文編號(hào)：2413231