本文選題：樁基托換 + CFRP加固�。� 參考：《蘭州交通大學(xué)》2017年碩士論文

【摘要】：隨著地下空間運(yùn)輸通道的快速發(fā)展,樁基托換技術(shù)以其獨(dú)特具有的經(jīng)濟(jì)性、安全性以及優(yōu)良的環(huán)保性在下穿建筑物的城市地下工程中得到廣泛地應(yīng)用。近年來,世界已進(jìn)入多地震活動(dòng)期,地震活動(dòng)十分頻繁,而橋梁作為重要的生命線工程之一,在抗震救災(zāi)過程中起到的作用就不言而喻了,因此,對(duì)下穿建筑物的城市地下工程中樁基托換的橋梁進(jìn)行抗震性能研究具有很大的現(xiàn)實(shí)意義,而對(duì)其采用相應(yīng)的抗震加固措施來提高或恢復(fù)橋梁結(jié)構(gòu)的抗震性能,就顯得十分必要。CFRP(碳纖維布)作為一種新型的高性能材料,由于其良好的性能在眾多的結(jié)構(gòu)加固工程中備受人們的青睞。本文以蘭州市城關(guān)區(qū)地鐵一號(hào)線隧道下穿爛泥溝橋的改建加固工程為研究背景,就幾種可行方案比較分析,得出樁基托換方案為最優(yōu)方案。運(yùn)用ANSYS軟件,對(duì)原結(jié)構(gòu)、樁基托換結(jié)構(gòu)以及樁基托換后CFRP(碳纖維布)加固墩柱三種結(jié)構(gòu)進(jìn)行模態(tài)分析。通過對(duì)結(jié)果的比較發(fā)現(xiàn):結(jié)構(gòu)形式不同,每階振型在所有振型中的貢獻(xiàn)率也不同;樁基托換后結(jié)構(gòu)的振動(dòng)頻率增大,而且CFRP加固托換結(jié)構(gòu)后振動(dòng)頻率進(jìn)一步增大,即振動(dòng)周期縮短。根據(jù)橋梁地震反應(yīng)譜理論,得到結(jié)構(gòu)的地震頻譜值,對(duì)原結(jié)構(gòu)、樁基托換結(jié)構(gòu)以及樁基托換后CFRP(碳纖維布)加固墩柱三種結(jié)構(gòu)進(jìn)行動(dòng)力反應(yīng)譜分析。從而得出樁基托換后結(jié)構(gòu)的應(yīng)力增大,超出規(guī)范允許范圍,而CFRP加固后結(jié)構(gòu)的應(yīng)力值減小,說明CFRP加固法提高了結(jié)構(gòu)的抗拉、抗剪承載力。采用EL-Centro波對(duì)原結(jié)構(gòu)、樁基托換結(jié)構(gòu)以及樁基托換后CFRP(碳纖維布)加固墩柱三種結(jié)構(gòu)進(jìn)行地震動(dòng)時(shí)程分析,得到結(jié)構(gòu)的地震響應(yīng)。樁基托換后CFRP加固結(jié)構(gòu)的應(yīng)力值較原結(jié)構(gòu)和樁基托換結(jié)構(gòu)的大,跟說明采用CFRP進(jìn)行結(jié)構(gòu)的抗震加固是是可行有效的。
[Abstract]:With the rapid development of underground space transportation passage, pile underpinning technology has been widely used in urban underground engineering with its unique economy, safety and excellent environmental protection. In recent years, the world has entered a period of multi-seismicity, seismic activity is very frequent, and bridge, as one of the important lifeline projects, plays a self-evident role in the earthquake relief process, therefore, It is of great practical significance to study the aseismic behavior of bridges with pile foundation underpinning in urban underground engineering, and the corresponding seismic reinforcement measures are adopted to improve or restore the seismic performance of bridge structures. As a new kind of high performance material, CFRP (carbon fiber sheet) is very necessary. Because of its good performance, it is very popular in many structural strengthening projects. In this paper, based on the research background of the reconstruction and reinforcement of the tunnel under the tunnel of No. 1 subway line in Chengguan District, Lanzhou City, the author compares and analyzes several feasible schemes and concludes that the pile foundation underpinning scheme is the best. The modal analysis of the original structure, pile foundation underpinning structure and CFRP (CFRP) reinforced pier column after pile foundation replacement is carried out by using ANSYS software. Through the comparison of the results, it is found that the contribution rate of each vibration mode in all modes is different with different structural forms, and the vibration frequency of the structure increases after the pile foundation is replaced, and the vibration frequency increases further after the CFRP reinforcement of the underpinning structure. That is, the vibration period is shortened. According to the theory of bridge seismic response spectrum, the seismic spectrum value of the structure is obtained. The dynamic response spectrum of the original structure, the pile foundation underpinning structure and the CFRP (carbon fiber sheet) reinforced pier column after the pile foundation replacement is analyzed. It is concluded that the stress of the structure after pile foundation replacement increases beyond the allowable range of the code, while the stress value of the CFRP strengthened structure decreases, which indicates that the CFRP strengthening method improves the tensile and shear bearing capacity of the structure. Using EL-Centro wave to analyze the ground motion time history of the original structure, pile foundation underpinning structure and CFRP (carbon fiber sheet) reinforced pier column after pile foundation replacement, the seismic response of the structure is obtained. The stress value of CFRP strengthened structure after pile foundation replacement is larger than that of original structure and pile foundation underpinning structure.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U442.55;U445.72

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 呂振強(qiáng);;橋梁抗震加固技術(shù)現(xiàn)狀及發(fā)展趨勢(shì)[J];黑龍江交通科技;2014年09期

2 杜修力;韓強(qiáng);;橋梁抗震研究若干進(jìn)展[J];地震工程與工程振動(dòng);2014年04期

3 潘健;易介民;;地鐵隧道穿越橋梁樁基的托換施工技術(shù)[J];廣東土木與建筑;2010年02期

4 王士哲;段樹金;曹敬鵬;;樁基托換結(jié)構(gòu)的動(dòng)力分析[J];石家莊鐵道學(xué)院學(xué)報(bào)(自然科學(xué)版);2009年03期

5 宋恒揚(yáng);;汶川大地震橋梁震害對(duì)山區(qū)既有簡支梁橋抗震加固的啟示[J];西南公路;2008年04期

6 鄧宗才;李朋遠(yuǎn);;FRP加固鋼筋混凝土柱抗震性能的研究進(jìn)展[J];工程建設(shè);2008年04期

7 劉世忠;;基于ANSYS的鋼筋混凝土結(jié)構(gòu)非線性有限元分析[J];四川建筑;2006年02期

8 殷紅偉,黃志軍,董建剛;樁基托換在廣州地鐵三號(hào)線中的應(yīng)用[J];山西建筑;2005年12期

9 曹杰,程華,張靜,熊曄;CFRP加固混凝土柱抗震性能的有限元分析[J];后勤工程學(xué)院學(xué)報(bào);2004年02期

10 黃福偉,許曉鋒,鄭萬山;橋梁抗震加固技術(shù)現(xiàn)狀及發(fā)展趨勢(shì)[J];公路交通技術(shù);2003年05期

相關(guān)會(huì)議論文 前1條

1 吳剛;呂志濤;張繼文;;CFRP布加固鋼筋混凝土柱抗震性能的試驗(yàn)研究[A];第二屆全國土木工程用纖維增強(qiáng)復(fù)合材料（FRP）應(yīng)用技術(shù)學(xué)術(shù)交流會(huì)論文集[C];2002年

相關(guān)碩士學(xué)位論文 前7條

1 陳金義;碳纖維布加固鋼筋混凝土箱梁彎扭受力性能研究[D];蘭州交通大學(xué);2016年

2 賈培棟;被動(dòng)式橋梁樁基托換方案研究與應(yīng)用[D];蘭州交通大學(xué);2015年

3 吳欣;大跨度鋼桁架橋的地震響應(yīng)分析[D];河北工程大學(xué);2014年

4 王輝;CFRP加固大直徑橋梁墩柱理論分析[D];長安大學(xué);2011年

5 余玲玲;高墩大跨連續(xù)剛構(gòu)橋地震反應(yīng)分析[D];湖南大學(xué);2008年

6 胡偉紅;CFRP加固鋼筋混凝土柱受剪承載力分析及抗震性能試驗(yàn)研究[D];清華大學(xué);2004年

7 黃祥忠;獨(dú)立柱基礎(chǔ)托換與結(jié)構(gòu)加固技術(shù)研究[D];西安建筑科技大學(xué);2004年

，

本文編號(hào)：2018623