本文關鍵詞：大跨高墩連續(xù)剛構橋橋墩結構型式研究　出處：《重慶交通大學》2014年碩士論文　論文類型：學位論文

  更多相關文章： 連續(xù)剛構橋 橋墩型式 穩(wěn)定性 溫度效應 線形和應力

【摘要】：大跨高墩連續(xù)剛構橋因其受力明確、行車順暢、施工技術成熟等特點而得到廣泛采用，是山區(qū)高速公路跨越深溝、河流的主要橋梁形式，并朝著高墩、大跨、輕柔方向發(fā)展。在薄壁高墩橋梁中，結構的穩(wěn)定問題變得日益突出，在大跨徑高墩橋梁中具有特別重要的意義。連續(xù)剛構橋是多次超靜定結構，由于其長期處于自然環(huán)境中,受到太陽輻射等溫度變化的影響,會使其產生較大的應力和變形,甚至導致橋梁產生嚴重的破壞造成重大橋梁事故。因此,對連續(xù)剛構橋進行穩(wěn)定問題和溫度效應問題分析是十分有必要的。 橋墩型式直接影響到結構的穩(wěn)定性和結構的受力性能，有必要對高柔性墩的一些特性和計算方法作深入研究。本文以涪陵沙塘壩大橋為工程背景，針對上述問題作了以下研究： ①對大跨高墩連續(xù)剛構橋橋墩在施工過程中的穩(wěn)定性進行理論分析，討論兩類穩(wěn)定問題及其臨界荷載值的幾種求解方法和穩(wěn)定問題的判別準則。 ②通過結構有限元計算，，對比分析不同截面型式高墩連續(xù)剛構橋施工過程中的橋墩竣工和最大懸臂兩個施工階段在自重和外力作用下的穩(wěn)定性。 ③通過理論分析和結構有限元計算，對比分析不同截面型式高墩連續(xù)剛構橋成橋后在整體溫變荷載作用下的線形和應力情況。 ④通過理論分析和結構有限元計算，對比分析不同截面型式高墩連續(xù)剛構橋成橋后在主梁溫度梯度荷載和橋墩溫度梯度荷載作用下的線形和應力情況。
[Abstract]:Continuous rigid frame bridge with long span and high pier is widely used because of its clear force, smooth running and mature construction technology. It is the main bridge form of mountain expressway crossing deep ditch and river, and facing high pier and long span. In the thin-walled high-pier bridge, the stability problem of the structure becomes increasingly prominent, and has a special significance in the long-span high-pier bridge. The continuous rigid frame bridge is a multi-statically indeterminate structure. Because it is in the natural environment for a long time and is affected by temperature change such as solar radiation, it will produce greater stress and deformation, and even cause serious damage to the bridge and cause serious bridge accidents. It is necessary to analyze the stability problem and temperature effect of continuous rigid frame bridge. The type of pier directly affects the stability of the structure and the mechanical performance of the structure. It is necessary to deeply study some characteristics and calculation methods of the high flexible pier. This paper takes Fuling ShaTangba Bridge as the engineering background. The following studies were carried out in response to the above: The main contents are as follows: (1) the stability of pier of long-span and high-pier continuous rigid frame bridge during construction is theoretically analyzed, and the two kinds of stability problems and their critical load value are discussed, and the criterion of stability problem is discussed. (2) through the finite element calculation of the structure, the stability of the piers completed and the maximum cantilever in the construction process of the continuous rigid frame bridge with high piers of different cross-section types under the action of deadweight and external force is analyzed. (3) through theoretical analysis and structural finite element calculation, the linear and stress conditions of continuous rigid frame bridge with high piers with different cross-sections under the action of global temperature varying load are compared and analyzed. (4) through theoretical analysis and structural finite element calculation, the alignment and stress of continuous rigid frame bridge with high piers with different cross-sections under the action of temperature gradient load of main beam and temperature gradient load of pier are compared and analyzed.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U448.23;U443.22

【參考文獻】

相關期刊論文 前10條

1 邵旭東,李立峰,鮑衛(wèi)剛;砼箱形梁橫向溫度應力計算分析[J];重慶交通學院學報;2000年04期

2 王銀輝,吳劍敏,劉東;變截面空心薄壁墩的穩(wěn)定計算[J];公路;2004年01期

3 潘志炎,史方華;高橋墩穩(wěn)定性分析[J];公路;2004年09期

4 徐君蘭,顧安邦;連續(xù)剛構橋主墩剛度合理性的探討[J];公路交通科技;2005年02期

5 張偉;付大喜;何海英;;高墩穩(wěn)定性計算[J];公路交通技術;2006年03期

6 袁卓亞;馬毓泉;馮威;;高墩大跨徑預應力混凝土連續(xù)剛構空間仿真方法研究[J];公路交通技術;2007年06期

7 寧曉駿;李睿;楊昌正;安瀟竹;;超高墩設計研究[J];公路交通技術;2008年01期

8 歐陽青;王艷;王艷華;;高墩大跨連續(xù)剛構橋墩形式研究[J];中外公路;2008年01期

9 王明明;;車輛荷載作用下高墩大跨連續(xù)剛構橋的動力反應分析[J];華東公路;2008年03期

10 余f雄;柔性墩溫度場場形及影響因素的分析[J];江漢大學學報;1998年06期

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