【摘要】：為了保證現(xiàn)有自錨式懸索橋的安全運(yùn)營(yíng),盡可能延長(zhǎng)橋梁的安全使用年限,需要對(duì)自錨式懸索橋進(jìn)行檢測(cè)評(píng)估,了解它的安全狀況和剩余承載力。本文以小龍灣橋?yàn)楣こ瘫尘?分析混凝土自錨式懸索橋的受力性能。本文采用非線性桿系有限元法對(duì)自錨式懸索橋進(jìn)行受力性能的分析。通過(guò)荷載試驗(yàn)對(duì)小龍灣橋的進(jìn)行承載能力的評(píng)定。首先通過(guò)外觀評(píng)估檢測(cè)法檢測(cè)小龍灣橋的各個(gè)重要部件,對(duì)正常使用狀況下的小龍灣橋進(jìn)行結(jié)構(gòu)狀況的評(píng)估,鑒定小龍灣橋的等級(jí)。再施加不同類型的車輛荷載,研究主纜位移、主塔塔頂位移、塔頂截面應(yīng)力、主纜錨跨內(nèi)力和主梁截面應(yīng)力分布的規(guī)律。之后運(yùn)用Midas/Civil軟件建立三維空間桿系模型,進(jìn)行等效的荷載試驗(yàn)?zāi)M。借助等效桿系模型研究不同結(jié)構(gòu)剛度參數(shù)對(duì)自錨式懸索橋主梁的受力特性和橋梁整體振動(dòng)頻率的影響。研究表明:對(duì)于自錨式懸索橋,主梁剛度對(duì)結(jié)構(gòu)總體剛度的影響比較大,增加主梁剛度可以明顯減少主梁受到的彎矩作用,因此在自錨式懸索橋的設(shè)計(jì)中可以適當(dāng)增加加勁梁的梁高。同時(shí)主梁剛度和主纜剛度對(duì)自錨式懸索橋的振動(dòng)頻率有很大的影響,增大主梁剛度或主纜剛度都會(huì)提高自錨式懸索橋的振動(dòng)頻率,因此考慮到減隔震和行車舒適性,主梁剛度和主纜剛度可以適當(dāng)提升。本文主要是對(duì)自錨式懸索橋的靜載試驗(yàn)以及動(dòng)載試驗(yàn)中的振動(dòng)特性方面進(jìn)行的研究,對(duì)于行車動(dòng)力響應(yīng)并沒(méi)有進(jìn)行深入的研究,具有一定的局限性。但是通過(guò)靜載試驗(yàn)與振動(dòng)特性的研究已經(jīng)可以較好地反應(yīng)出自錨式懸索橋的安全性和承載能力,因此本文的研究可以給同類型橋梁的研究一些參考。
[Abstract]:In order to ensure the safe operation of the existing self-anchored suspension bridge and prolong the safety service life of the bridge, it is necessary to test and evaluate the self-anchored suspension bridge to understand its safety status and residual bearing capacity. Taking Xiaolong Bay Bridge as the engineering background, this paper analyzes the mechanical behavior of concrete self-anchored suspension bridge. In this paper, nonlinear finite element method is used to analyze the mechanical behavior of self-anchored suspension bridge. The loading capacity of Xiaolong Bay Bridge is evaluated by load test. At first, the main components of Xiaolong Bay Bridge are detected by appearance evaluation method, and the structure of Xiaolong Bay Bridge in normal use is evaluated to identify the grade of Xiaolong Bay Bridge. The displacement of the main cable, the displacement of the top of the main tower, the stress of the top section of the tower, the internal force of the anchor span of the main cable and the stress distribution of the cross section of the main beam are studied by applying different types of vehicle loads. Then the three-dimensional spatial bar model is established by Midas/Civil software, and the equivalent load test simulation is carried out. The effects of different structural stiffness parameters on the stress characteristics of the main girder and the overall vibration frequency of the self-anchored suspension bridge are studied by using the equivalent bar system model. The results show that for self-anchored suspension bridge, the stiffness of the main beam has a great effect on the overall stiffness of the structure, and the increase of the stiffness of the main beam can obviously reduce the moment effect of the main beam. Therefore, in the design of self-anchored suspension bridge, the beam height of stiffened beam can be increased appropriately. At the same time, the stiffness of the main beam and the main cable have great influence on the vibration frequency of the self-anchored suspension bridge. Increasing the stiffness of the main beam or the main cable will increase the vibration frequency of the self-anchored suspension bridge. The stiffness of the main beam and the main cable can be raised appropriately. In this paper, the static load test of self-anchored suspension bridge and the vibration characteristics of the dynamic load test are studied, but there is no in-depth study on the dynamic response of the vehicle, which has some limitations. However, the study of static load test and vibration characteristics can reflect the safety and bearing capacity of the anchor suspension bridge, so the research in this paper can be used as a reference for the study of the same type of bridge.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U448.25

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 楊剛;余洋;;基于靜載試驗(yàn)的自錨式懸索橋承載性能分析[J];公路與汽運(yùn);2016年06期

2 潘嵩崧;屈本寧;黃坤;;懸索橋吊桿剛度對(duì)橋梁動(dòng)力特性的影響[J];低溫建筑技術(shù);2016年04期

3 肖勇剛;陳偉華;;大跨度懸索橋動(dòng)力特性的參數(shù)分析[J];長(zhǎng)沙理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2016年01期

4 周云崗;孫斌;肖汝誠(chéng);;大跨徑三塔纜索承重橋梁力學(xué)參數(shù)敏感度分析[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2016年01期

5 王海鵬;;基于荷載試驗(yàn)的上承式混凝土箱形拱橋承載能力評(píng)定研究[J];施工技術(shù);2015年17期

6 柴生波;王秀蘭;肖汝誠(chéng);;懸索橋主纜縱橋向約束剛度研究[J];中國(guó)公路學(xué)報(bào);2015年08期

7 楊海洋;鐘鐵毅;夏禾;;中央扣對(duì)大跨度懸索橋地震響應(yīng)影響及機(jī)理研究[J];鐵道學(xué)報(bào);2015年05期

8 陶慶東;肖盛燮;;大跨度自錨式懸索橋的自振特性分析[J];四川建筑科學(xué)研究;2015年02期

9 包龍生;曹鑫;于玲;李慶剛;;結(jié)構(gòu)參數(shù)對(duì)鋼-混組合橋塔自錨式懸索橋靜力性能的影響研究[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2014年05期

10 康俊濤;袁敏;王同民;;大跨徑自錨式懸索橋成橋狀態(tài)動(dòng)力特性參數(shù)分析[J];橋梁建設(shè);2013年06期

相關(guān)博士學(xué)位論文 前1條

1 胡建華;大跨度自錨式懸索橋結(jié)構(gòu)體系及靜動(dòng)力性能研究[D];湖南大學(xué);2006年

相關(guān)碩士學(xué)位論文 前7條

1 范志甫;自錨式懸索橋主梁拱度對(duì)靜動(dòng)力特性的影響分析[D];湘潭大學(xué);2011年

2 彭震;雙曲拱橋病害分析及加固處理研究[D];中南大學(xué);2011年

3 蔣少寒;莊河建設(shè)大橋施工控制[D];大連理工大學(xué);2008年

4 鄧瑋瑋;橋梁動(dòng)載試驗(yàn)自振特性測(cè)試與沖擊荷載測(cè)試的研究[D];合肥工業(yè)大學(xué);2007年

5 高至飛;鐵路橋梁狀態(tài)診斷試驗(yàn)技術(shù)研究[D];中南大學(xué);2007年

6 李庭波;索力測(cè)試頻率法的研究及其工程應(yīng)用[D];長(zhǎng)沙理工大學(xué);2007年

7 魏志新;金石灘自錨式懸索橋的設(shè)計(jì)和施工控制[D];大連理工大學(xué);2002年

，

本文編號(hào)：2145285