發(fā)布時間：2018-02-16 06:32

  本文關(guān)鍵詞： 小邊跨 連續(xù)梁橋 靜力分析 設(shè)計參數(shù)　出處：《長安大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：PC連續(xù)梁橋是我國公路交通建設(shè)中一種適用性很強的橋型。在一些特殊的地形上,需要依靠中跨一次性跨越航道、溝壑或線路而采取小邊跨連續(xù)梁橋建設(shè)方案,但目前小邊跨PC連續(xù)梁橋的應(yīng)用和研究還不是很多。針對這一情況,論文在已有研究和應(yīng)用的基礎(chǔ)上,對小邊跨PC連續(xù)梁橋進行了靜力分析及設(shè)計參數(shù)的研究。論文首先歸納總結(jié)了小邊跨PC連續(xù)梁橋的研究現(xiàn)狀和應(yīng)用,然后選取了一座邊中跨比為0.3的三跨PC連續(xù)梁橋作為研究背景,并以一座常規(guī)邊中跨比的PC連續(xù)梁橋作為對比,有限元仿真模擬計算對比分析兩座橋的靜力性能。論文還分析了國內(nèi)外連續(xù)梁橋的邊中跨比取值,并在小于常規(guī)取值的情況下依托背景橋建立了13個不同邊中跨比的連續(xù)梁橋模型,計算分析了小邊中跨比對橋梁受力性能的影響。論文得到的結(jié)論有:1、邊中跨比值小于0.5的PC連續(xù)梁橋為小邊跨PC連續(xù)梁橋。小邊跨PC連續(xù)梁橋方案是跨越岸坡陡峭的V型溝谷、邊灘狹窄的城市河道和城市路線,避開地質(zhì)薄弱帶,景觀造型的合理選擇。2、當總跨徑相同時,小邊跨PC連續(xù)梁橋的受力和變形性能較常規(guī)邊中跨比的PC連續(xù)梁橋的差。通過合理的結(jié)構(gòu)設(shè)計和預(yù)應(yīng)力布置,小邊跨PC連續(xù)梁橋依然可以滿足結(jié)構(gòu)安全的要求。3、當邊中跨比取值在0.5~0.2范圍內(nèi),邊中跨比減小,邊跨橋臺支座逐漸由受壓變成受拉。為了防止邊跨橋墩(臺)支座受拉,邊跨可澆筑鐵砂混凝土配重。在條件允許的情況下,邊跨宜采用等截面形式。
[Abstract]:PC continuous beam bridge is a bridge type with strong applicability in highway traffic construction in our country. In some special terrain, it is necessary to adopt the construction scheme of small side span continuous beam bridge depending on the one-off crossing channel, gully or line of middle span. But at present, the application and research of PC continuous beam bridge with small side span are not many. In view of this situation, the thesis is based on the existing research and application. The static analysis and design parameters of PC continuous beam bridge with small side span are studied. Firstly, the research status and application of PC continuous beam bridge with small edge span are summarized and summarized in this paper. Then, a three-span PC continuous beam bridge with a ratio of 0.3 to 0.3 is selected as the research background, and a conventional PC continuous beam bridge with mid-span ratio is compared. The static performance of the two bridges is compared with the finite element simulation calculation. In this paper, the ratio of side to middle span of continuous beam bridges at home and abroad is also analyzed. Under the condition that the value is less than the normal value, 13 continuous beam bridge models with different side to middle span ratio are established based on the background bridge. The effect of the ratio of middle to middle span on the mechanical performance of the bridge is calculated and analyzed. It is concluded that the PC continuous beam bridge with a ratio of 1 to 0.5 is a PC continuous beam bridge with small side span. The small side span PC continuous beam bridge scheme is a V-shaped valley with steep bank slope. Narrow riverways and urban routes of banks, avoiding geological weak zones, reasonable selection of landscape modeling. When the total span is the same, The mechanical and deformation behavior of PC continuous beam bridge with small side span is worse than that of PC continuous beam bridge with middle and middle span ratio of side to middle side. Through reasonable structural design and prestress arrangement, PC continuous beam bridge with small side span can still meet the requirements of structural safety. When the ratio of side to middle span is in the range of 0.50. 2, the ratio of side to middle span decreases, and the side span abutment support gradually changes from compression to tension. In order to prevent the side span pier (abutment) bearing from being pulled, The side span can be poured with iron sand concrete counterweight. If conditions permit, the side span should adopt the form of equal cross section.
【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】：2015
【分類號】：U448.215

【參考文獻】

相關(guān)期刊論文 前7條

1 王宜平;;金阿鐵路寧遠堡特大橋連續(xù)梁設(shè)計[J];甘肅科技;2011年01期

2 劉志軍;;一座大跨度人行橋梁的設(shè)計研究[J];鐵道工程學(xué)報;2008年08期

3 滕炳杰;;掛籃懸澆與大節(jié)段支架現(xiàn)澆方案對比分析[J];鐵道工程學(xué)報;2012年06期

4 湯崇菊;鄧磊;;不對稱跨徑的連續(xù)梁橋靜動載試驗研究[J];鐵道建筑;2014年08期

5 王小岐;;剛構(gòu)連續(xù)梁梁端配重鐵砂混凝土應(yīng)用[J];四川建筑;2013年02期

6 夏風波;黃興波;張宏彬;;大跨徑不對稱預(yù)應(yīng)力混凝土連續(xù)梁橋設(shè)計[J];中國水運(下半月刊);2010年10期

7 馬s，

本文編號：1514882