斜吊桿布置對中承式鋼管混凝土拱橋力學(xué)性能的影響
本文選題:鋼管混凝土拱橋 + 傾斜吊桿; 參考:《長安大學(xué)》2017年碩士論文
【摘要】:近幾十年來,由于鋼管混凝土拱橋因?yàn)榭缭侥芰?qiáng)、外形美觀、施工便捷等優(yōu)勢,已經(jīng)被大量的推廣運(yùn)用。然而,在這些鋼管混凝土拱橋中斜吊桿的運(yùn)用卻極少。斜吊桿相比于直吊桿布置,可以使拱橋拱具有梁彎矩及撓度變小、整體剛度大、經(jīng)濟(jì)美觀等優(yōu)點(diǎn)。斜吊桿布置拱橋,在國外已經(jīng)得到了廣泛應(yīng)用,但是國內(nèi)尚未見使用。本文以某一鋼管混凝土拱橋?yàn)楸尘肮こ?以研究在不同斜吊桿布置形式下拱橋結(jié)構(gòu)內(nèi)力和撓度的變化及結(jié)構(gòu)的穩(wěn)定性及動力特性。關(guān)于鋼管混凝土拱橋的發(fā)展情況、拱橋吊桿的布置形式的相關(guān)研究狀況,本文進(jìn)行了簡單的介紹。接著介紹了拱橋的計(jì)算理論,包括穩(wěn)定及動力方面的理論。然后結(jié)合具體工程實(shí)例,借助橋梁專業(yè)有限元軟件邁達(dá)斯對結(jié)構(gòu)進(jìn)行模擬,就不同的吊桿布置形式,在線彈性范圍內(nèi),研究吊桿的布置形式對結(jié)構(gòu)受力的影響。研究表明,相對于直吊桿布置,斜吊布置可以使拱肋彎矩重新分配,正因?yàn)檫@種重新分配,可以使結(jié)構(gòu)受力更加均勻,從而會位移明顯的減小。接著,運(yùn)用線彈性穩(wěn)定分析法,研究了吊桿布置形式、吊桿剛度及吊桿失效對結(jié)構(gòu)穩(wěn)定的影響,研究表明,以上幾種因素中,吊桿剛度對結(jié)構(gòu)的影響較為明顯。同時研究了不同吊桿布置形式對結(jié)構(gòu)動力特性的影響,斜吊桿布置能明顯提高拱結(jié)構(gòu)的面內(nèi)振動的自振頻率,而對于面外振動的自振頻率影響較小。
[Abstract]:In recent decades, CFST arch bridge has been widely used because of its strong span ability, beautiful appearance, convenient construction and so on. However, in these concrete-filled steel tube arch bridges, inclined suspenders are rarely used. Compared with the arrangement of vertical suspenders, the inclined suspenders can make the arch of the arch bridge have the advantages of smaller bending moment and deflection of beam, larger overall stiffness, and more economical and beautiful. Skew suspenders have been widely used in foreign countries, but they have not been used in our country. In this paper, a concrete filled steel tube arch bridge is used as a background project to study the variation of internal force and deflection, stability and dynamic characteristics of the arch bridge under different slant suspension arrangement. About the development of concrete-filled steel tube arch bridge and the related research status of the arch bridge suspenders, this paper briefly introduces. Then the calculation theory of arch bridge is introduced, including the theory of stability and dynamics. Then, with the help of the bridge professional finite element software Midas, the structure is simulated with concrete engineering examples, and the influence of the arrangement form of the suspender on the force of the structure is studied according to the different arrangement forms of the suspenders and the online elastic range. The research shows that the oblique suspension arrangement can redistribute the bending moment of the arch rib compared with the arrangement of the vertical suspender. Because of this redistribution the force of the structure can be more uniform and the displacement will be reduced obviously. Then, by using the linear elastic stability analysis method, the influence of the configuration of the suspension rod, the stiffness of the suspension rod and the failure of the suspension rod on the structural stability is studied. The results show that among the above factors, the influence of the suspension stiffness on the structure stability is more obvious. At the same time, the influence of different suspenders layout on the dynamic characteristics of the structure is studied. The inclined suspension arrangement can obviously increase the in-plane vibration frequency of the arch structure, but has little effect on the out-of-plane vibration frequency.
【學(xué)位授予單位】:長安大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:U448.22
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 師磊;;鋼管混凝土的應(yīng)用現(xiàn)狀[J];建材世界;2010年02期
2 劉劍;劉永健;楊炳成;;關(guān)于橋梁結(jié)構(gòu)線彈性穩(wěn)定安全系數(shù)的討論[J];廣西大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年06期
3 李興權(quán);孫曉燕;武慶良;;圓鋼管混凝土結(jié)構(gòu)的發(fā)展和特點(diǎn)[J];科技經(jīng)濟(jì)市場;2009年04期
4 程泗勇;;淺談橋梁結(jié)構(gòu)的極限承載力[J];科技信息(科學(xué)教研);2008年19期
5 陳寶春;葉琳;;我國混凝土拱橋現(xiàn)狀調(diào)查與發(fā)展方向分析[J];中外公路;2008年02期
6 顏東煌;劉雪鋒;田仲初;顏高亮;;組合體系拱橋的發(fā)展與應(yīng)用綜述[J];世界橋梁;2007年02期
7 董桔燦;陳寶春;高婧;;網(wǎng)拱應(yīng)用綜述[J];中外公路;2007年01期
8 邰扣霞;丁大鈞;;中國橋梁建設(shè)新飛躍[J];建筑科學(xué)與工程學(xué)報(bào);2006年02期
9 陳寶春,陳友杰,王來永,韓林海;鋼管混凝土偏心受壓應(yīng)力-應(yīng)變關(guān)系模型研究[J];中國公路學(xué)報(bào);2004年01期
10 劉釗,呂志濤;豎吊桿與斜吊桿系桿拱結(jié)構(gòu)的橋式研究[J];土木工程學(xué)報(bào);2000年05期
相關(guān)會議論文 前1條
1 錢蓮萍;項(xiàng)海帆;;橋梁結(jié)構(gòu)第一類彈塑性穩(wěn)定分析及實(shí)用計(jì)算法[A];中國土木工程學(xué)會市政工程專業(yè)委員會第一次城市橋梁學(xué)術(shù)會議論文集[C];1987年
相關(guān)碩士學(xué)位論文 前4條
1 羅學(xué)睿;鋼管混凝土系桿拱橋收縮徐變效應(yīng)研究[D];長安大學(xué);2015年
2 孫寧;鋼管混凝土拱橋空間穩(wěn)定性的非線性分析[D];長安大學(xué);2008年
3 李志波;鋼管混凝土拱橋動力性能研究[D];西南交通大學(xué);2008年
4 安欣;鋼管混凝土拱橋溫度效應(yīng)研究[D];長安大學(xué);2007年
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