【摘要】：本文以呼和浩特市鼓樓立交橋A1主線橋第16跨～第22跨預(yù)應(yīng)力混凝土連續(xù)箱型梁橋?yàn)楣こ瘫尘?針對(duì)預(yù)應(yīng)力混凝土連續(xù)箱型梁橋存在的病害狀況,并結(jié)合橋梁現(xiàn)場(chǎng)荷載試驗(yàn)評(píng)價(jià)橋梁基于現(xiàn)行規(guī)范的受力性能,在此基礎(chǔ)上,對(duì)體外預(yù)加力碳纖維板加固預(yù)應(yīng)力混凝土連續(xù)箱型梁橋損傷結(jié)構(gòu)進(jìn)行數(shù)值模擬分析,評(píng)價(jià)寒冷地區(qū)基于體外預(yù)加力碳纖維板加固設(shè)計(jì)的有效性,并對(duì)加固方案提出優(yōu)化建議,為寒冷地區(qū)類似病害橋梁的處理提供技術(shù)依據(jù)。本論文在現(xiàn)場(chǎng)病害調(diào)查的基礎(chǔ)上主要主要進(jìn)行如下工作：1、對(duì)依托工程進(jìn)行詳細(xì)的現(xiàn)場(chǎng)調(diào)查,掌握設(shè)計(jì)資料,并總結(jié)國(guó)內(nèi)外體外預(yù)加力碳纖維板加固方法的研究現(xiàn)狀。2、結(jié)合鼓樓立交橋設(shè)計(jì)資料,通過(guò)對(duì)原橋進(jìn)行基于現(xiàn)行規(guī)范的計(jì)算與驗(yàn)算,結(jié)果表明損傷前該橋滿足現(xiàn)行規(guī)范的受力性能要求。3、通過(guò)橋梁外觀裂縫檢測(cè)和橋梁無(wú)損檢測(cè)總結(jié)該橋存在的主要病害,分析和討論病害產(chǎn)生的具體原因；并對(duì)加固前預(yù)應(yīng)力混凝土連續(xù)箱梁進(jìn)行基于現(xiàn)行規(guī)范的現(xiàn)場(chǎng)靜載試驗(yàn),運(yùn)用有限元軟件Midas/FEA330模擬對(duì)比分析,評(píng)價(jià)鼓樓立交橋加固前損傷后主梁的受力性能,研究結(jié)果表明,該橋梁底縱向預(yù)應(yīng)力不足。4、在已知橋梁損傷狀況的基礎(chǔ)上,結(jié)合橋梁實(shí)際加固方案,對(duì)體外預(yù)加力碳纖維板加固后的橋梁受力狀況進(jìn)行數(shù)值模擬,通過(guò)計(jì)算分析橋梁的加固效果；在滿足城-B級(jí)荷載等級(jí)的基礎(chǔ)上,探討其超載性能,并對(duì)原加固方案提出優(yōu)化建議。結(jié)果表明,碳纖維板能顯著改善舊橋受力性能。
[Abstract]:In this paper, based on the engineering background of the A 1 main line bridge of Gulou overpass in Hohhot City, the 16th ~ 22nd span prestressed concrete continuous box girder bridge is taken as the engineering background, aiming at the disease condition of the prestressed concrete continuous box girder bridge. Combined with the field load test of the bridge to evaluate the mechanical performance of the bridge based on the current code, the damage structure of prestressed concrete continuous box girder bridge strengthened with externally preloaded carbon fiber sheet is numerically simulated and analyzed. To evaluate the effectiveness of the reinforcement design of CFRP based on external prestressing in cold regions, and to provide technical basis for the treatment of bridges with similar diseases in cold regions. The main work of this paper is as follows: 1. Carry on the detailed field investigation to the supporting project, master the design data, and summarize the research status of the external prestressing CFRP reinforcement method at home and abroad. 2. Combined with the design data of Gulou overpass, the calculation and checking of the original bridge based on the current code are carried out. The results show that the bridge meets the requirements of the mechanical performance of the current code before the damage. 3. The main diseases of the bridge are summarized through the inspection of the exterior cracks of the bridge and the nondestructive testing of the bridge, and the concrete causes of the diseases are analyzed and discussed. The static load test of prestressed concrete continuous box girder before reinforcement is carried out on the basis of the current code. By using the finite element software Midas/FEA330 simulation and contrast analysis, the mechanical behavior of the main girder after the strengthening of the Gulou overpass is evaluated. The research results show that, The longitudinal prestressing of the bridge bottom is insufficient. 4. On the basis of the known damage condition of the bridge, combined with the actual reinforcement scheme of the bridge, the stress condition of the bridge strengthened with externally preloaded carbon fiber sheet is numerically simulated. The reinforcement effect of the bridge is analyzed by calculation. On the basis of meeting the load grade of city-B class, the overloading performance is discussed, and suggestions for optimization of the original reinforcement scheme are put forward. The results show that carbon fiber sheet can significantly improve the mechanical properties of the old bridge.
【學(xué)位授予單位】：內(nèi)蒙古大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U441

【參考文獻(xiàn)】

相關(guān)期刊論文 前8條

1 彭暉;尚守平;金勇俊;汪明;;預(yù)應(yīng)力碳纖維板加固受彎構(gòu)件的試驗(yàn)研究[J];工程力學(xué);2008年05期

2 肖玉輝,沈立宏;混凝土橋梁病害成因分析及對(duì)策研究[J];中外公路;2004年01期

3 梅力彪;張俊平;;預(yù)應(yīng)力碳纖維板加固混凝土梁的粘結(jié)錨固性能試驗(yàn)研究[J];工業(yè)建筑;2006年04期

4 魯乃唯;劉揚(yáng);彭暉;;預(yù)應(yīng)力CFRP板加固混凝土梁橋的可靠度分析[J];公路交通科技;2014年12期

5 劉江;;橋梁安全檢測(cè)與加固維修[J];科技信息(科學(xué)教研);2007年30期

6 王雅紅;;公路橋梁的養(yǎng)護(hù)與管理[J];內(nèi)蒙古科技與經(jīng)濟(jì);2007年17期

7 陸蓉;;靜載實(shí)驗(yàn)在橋梁檢測(cè)中的應(yīng)用研究[J];山西建筑;2013年35期

8 尚守平;李知兵;汪明;彭暉;;晝夜溫差對(duì)預(yù)應(yīng)力碳纖維板應(yīng)力的影響[J];土木工程學(xué)報(bào);2009年04期

相關(guān)碩士學(xué)位論文 前1條

1 張會(huì)遠(yuǎn);利用Midas FEA對(duì)橋梁加固效應(yīng)的分析研究[D];長(zhǎng)安大學(xué);2013年

，

本文編號(hào)：2427364