本文關(guān)鍵詞：下承式連續(xù)梁拱組合體系鋼橋的力學(xué)特性研究　出處：《東南大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 下承式連續(xù)梁拱組合體系 鋼橋 拱肋荷載分擔(dān)比 剪力滯 極限承載力

【摘要】：近年來(lái),隨著鋼材產(chǎn)量的迅速增長(zhǎng),越來(lái)越多的鋼結(jié)構(gòu)橋梁出現(xiàn)在我國(guó)橋梁工程建設(shè)中。下承式梁拱組合體系鋼橋兼具鋼橋與連續(xù)梁拱組合體系橋的優(yōu)點(diǎn),在保持受力合理的同時(shí)降低了建筑高度,建造速度快且造型美觀,工程應(yīng)用前景廣闊。本文結(jié)合江蘇省宜興市梅林大橋工程,從梁拱協(xié)作機(jī)理、結(jié)構(gòu)參數(shù)分析、鋼箱梁剪力滯效應(yīng)以及結(jié)構(gòu)極限承載力等四個(gè)方面,對(duì)下承式連續(xù)梁拱組合體系鋼橋的力學(xué)特性進(jìn)行了研究。(1)利用結(jié)構(gòu)力學(xué)方法,推導(dǎo)出此類橋拱肋荷載分擔(dān)比的計(jì)算公式,分析了結(jié)構(gòu)總體布置參數(shù)對(duì)其影響,發(fā)現(xiàn)下承式連續(xù)梁拱組合體系橋的主跨拱肋荷載分擔(dān)比例受邊跨主梁影響較小,中跨主梁和吊桿剛度對(duì)拱肋受力影響較大；(2)建立桿系單元模型,分析了梁拱剛度比、拱肋傾角及橫撐布置形式對(duì)結(jié)構(gòu)振動(dòng)頻率與振型的影響；(3)建立ABAQUS全橋板殼單元模型,對(duì)鋼箱梁的剪力滯效應(yīng)進(jìn)行了分析。比較了車輛荷載與車道荷載的剪力滯效應(yīng),發(fā)現(xiàn)車道荷載在主跨產(chǎn)生的剪力滯系數(shù)小于車輛荷載,而二者在邊跨產(chǎn)生的剪力滯系數(shù)接近。由車輛荷載產(chǎn)生的剪力滯系數(shù)在偏載工況下略大于正載工況；(4)建立ABAQUS顯式動(dòng)力分析模型,對(duì)背景工程橋梁的極限承載力進(jìn)行了分析、研究。得到了各工況下結(jié)構(gòu)控制截面的極限內(nèi)力值,并計(jì)算出結(jié)構(gòu)活載安全系數(shù)的最小值為8.6倍設(shè)計(jì)車道荷載及人群荷載,表明結(jié)構(gòu)運(yùn)營(yíng)安全儲(chǔ)備充足；(5)通過(guò)背景工程橋梁成橋荷載試驗(yàn)相關(guān)數(shù)據(jù),分析了成橋狀態(tài)下的靜力與動(dòng)力特性,對(duì)比了現(xiàn)場(chǎng)實(shí)測(cè)值與有限元模型計(jì)算值,驗(yàn)證了本文建立的桿系與板殼有限元模型的正確性。
[Abstract]:In recent years, with the rapid growth of steel output, more and more steel bridges appear in the construction of bridge engineering in China. The through beam and arch composite system steel bridge has the advantages of steel bridge and continuous beam arch composite system bridge. In keeping with reasonable force at the same time reducing the height of the building, fast construction speed and beautiful shape, the application of the project is broad. Combined with the Meilin Bridge Project in Yixing City, Jiangsu Province, from the beam and arch cooperation mechanism, structural parameters analysis. Based on the shear lag effect of steel box girder and the ultimate bearing capacity of the structure, the mechanical properties of steel bridge with through continuous beam and arch composite system are studied. 1) the structural mechanics method is used. The calculation formula of load sharing ratio of arch rib of this kind of bridge is deduced, and the influence of overall structure layout parameters on it is analyzed. It is found that the ratio of load sharing of main span arch rib of through continuous beam and arch composite system bridge is less affected by side span main beam. The stiffness of mid-span girder and suspender has a great influence on the arch rib. (2) the element model of bar system is established, and the influence of stiffness ratio of beam and arch, inclination angle of arch rib and arrangement of transverse braces on the vibration frequency and vibration mode of the structure are analyzed. The shear lag effect of steel box girder is analyzed, and the shear lag effect of vehicle load and driveway load is compared. It is found that the shear lag coefficient of lane load in the main span is smaller than that of the vehicle load, while the shear lag coefficient generated by both of them in the side span is close. The shear lag coefficient caused by the vehicle load is slightly larger than that under the positive load condition. (4) the ABAQUS explicit dynamic analysis model is established, the ultimate bearing capacity of the bridge in background engineering is analyzed and studied, and the limit internal force of the structure control section is obtained under various working conditions. The minimum value of live load safety factor is 8.6 times design lane load and crowd load, which indicates that the structure operation safety reserve is sufficient. 5) the static and dynamic characteristics of the bridge under the condition of the bridge are analyzed through the relevant data of the bridge load test in the background engineering, and the field measured values are compared with the calculated values of the finite element model. The correctness of the finite element model of bar system and shell is verified.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U441;U448.36

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 郭秉山;何瑋;閆月梅;;薄壁鋼箱梁考慮加勁肋構(gòu)造剪力滯效應(yīng)的計(jì)算[J];西安科技大學(xué)學(xué)報(bào);2012年05期

2 ;中國(guó)公路交通學(xué)術(shù)研究綜述·2012[J];中國(guó)公路學(xué)報(bào);2012年03期

3 李小年;馬如進(jìn);陳艾榮;;大跨度外傾式拱橋穩(wěn)定及極限承載力分析[J];橋梁建設(shè);2012年01期

4 潘盛山;徐軍;;鋼拱橋扁平鋼箱梁剪力滯效應(yīng)的研究[J];山東交通學(xué)院學(xué)報(bào);2011年02期

5 陳寶春;陳康明;趙秋;;中國(guó)鋼拱橋發(fā)展現(xiàn)狀調(diào)查與分析[J];中外公路;2011年02期

6 陳鴻鳴;;楊林塘大橋拱梁組合體系技術(shù)特點(diǎn)[J];城市道橋與防洪;2011年04期

7 王凌波;賀拴海;蔣培文;王鈞利;;大跨徑橋梁荷載試驗(yàn)加載方案算法設(shè)計(jì)[J];武漢理工大學(xué)學(xué)報(bào);2011年02期

8 沈銳利;齊東春;唐茂林;;杭州江東大橋靜力特性全橋模型試驗(yàn)研究[J];土木工程學(xué)報(bào);2011年01期

9 黃平明;任翔;李文杰;;拱肋內(nèi)傾角對(duì)鋼管混凝土拱橋靜動(dòng)力學(xué)的影響[J];長(zhǎng)安大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年02期

10 陳寶春;;拱橋技術(shù)的回顧與展望[J];福州大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年01期

相關(guān)會(huì)議論文 前3條

1 陸春陽(yáng);吳沖;蘇慶田;丁文俊;;斜拉橋分離式鋼箱組合梁剪力滯效應(yīng)和應(yīng)力集中[A];第十九屆全國(guó)橋梁學(xué)術(shù)會(huì)議論文集（下冊(cè)）[C];2010年

2 蔡金標(biāo);陳海浪;胡蒙;;下承式三跨連續(xù)梁拱組合橋梁拱梁荷載分擔(dān)比研究[A];第十九屆全國(guó)橋梁學(xué)術(shù)會(huì)議論文集（下冊(cè)）[C];2010年

3 黃僑;李忠龍;吳紅林;付金科;孫永明;;哈爾濱松花江斜拉橋成橋靜動(dòng)載試驗(yàn)[A];中國(guó)公路學(xué)會(huì)2005年學(xué)術(shù)年會(huì)論文集（上）[C];2005年

相關(guān)博士學(xué)位論文 前6條

1 喬朋;斜拉橋扁平鋼箱主梁剪力滯效應(yīng)研究[D];長(zhǎng)安大學(xué);2009年

2 田仲初;大跨度鋼箱拱橋的施工控制關(guān)鍵技術(shù)與動(dòng)力特性研究[D];中南大學(xué);2007年

3 易云q;梁拱組合體系設(shè)計(jì)理論關(guān)鍵問(wèn)題研究[D];同濟(jì)大學(xué);2007年

4 孫海濤;大跨度鋼桁架拱橋關(guān)鍵問(wèn)題研究[D];同濟(jì)大學(xué);2007年

5 萬(wàn)鵬;大跨度鋼拱橋極限承載力綜合三因素檢算方法研究[D];西南交通大學(xué);2005年

6 吳文清;波形鋼腹板組合箱梁剪力滯效應(yīng)問(wèn)題研究[D];東南大學(xué);2002年

，

本文編號(hào)：1440749