發(fā)布時(shí)間：2019-07-03 20:17

【摘要】：異形獨(dú)塔斜拉橋是一種由梁、異形橋塔、斜拉索三種構(gòu)件組合而成的復(fù)雜空間超靜定體系。在斜拉橋的施工過程當(dāng)中,程序比較復(fù)雜,影響因素眾多。本文以安徽省某支架現(xiàn)澆異形獨(dú)塔斜拉橋?yàn)檠芯繉ο?橋梁采用支架現(xiàn)澆施工方式,并且橋梁主塔形狀奇特,這兩個(gè)特點(diǎn)使得斜拉橋在施工上難度很大,斜拉索各施工階段索力難以確定,受力和線性難以控制,因此斜拉索的施工控制成為本橋梁施工中至關(guān)重要的環(huán)節(jié)。 首先,本文針對研究對象,進(jìn)行了該橋梁的施工控制技術(shù)研究,詳細(xì)地介紹了其施工的控制方法、控制內(nèi)容及其注意事項(xiàng),在一般橋型控制的基礎(chǔ)上,增加了針對斜拉索、異形橋塔的控制,并對監(jiān)控結(jié)果進(jìn)行了溫度修正,使得對研究對象的控制更加全面、準(zhǔn)確,施工更加安全。 其次,在斜拉索索力的施工控制過程中,本文在綜合比對剛性支承連續(xù)梁法和彎曲應(yīng)變能最小法基礎(chǔ)上,確定了基于有約束能量法的成橋索力求解方法；采用斜拉索二次張拉的方法,以解決在斜拉索張拉過程中,由于是滿堂支架現(xiàn)澆施工,斜拉索的張拉造成了支架的反力重分布,可能導(dǎo)致支架承載力不足的問題。在進(jìn)行斜拉索施工過程張拉計(jì)算時(shí),采用正裝分析法,鑒于在計(jì)算過程中需要多次繁瑣計(jì)算結(jié)構(gòu)影響矩陣,本文采用脫架系數(shù)法,通過有支架影響矩陣和無支架影響矩陣來對系統(tǒng)影響矩陣進(jìn)行修正,從而得出結(jié)構(gòu)影響矩陣,快速求解出控制過程中施工索力,節(jié)省了時(shí)間和人力,并將此方法應(yīng)用于本文的工程背景,得到了滿意的效果。 然后,本文針對斜拉橋在實(shí)際施工控制過程中的索力測試方法和數(shù)據(jù)處理進(jìn)行了詳細(xì)的介紹,同時(shí)介紹了頻率法求基頻過程中數(shù)據(jù)處理的頻差法和新基頻法,在這兩種數(shù)據(jù)處理方法的基礎(chǔ)上,本文對新基頻法求基頻作了修正,使得最終求得基頻更接近實(shí)際,誤差更小,進(jìn)而求出的索力更加準(zhǔn)確。 最后,本文針對研究對象,對橋梁模型中設(shè)計(jì)參數(shù)從理論上進(jìn)行了對比分析,分別詳細(xì)分析了橋梁結(jié)構(gòu)自重(施工臨時(shí)荷載)、橋梁整體剛度、混凝土收縮徐變、整體溫度等因素對異形獨(dú)塔斜拉橋成橋狀態(tài)的影響,進(jìn)而在施工控制過程中修正主要設(shè)計(jì)參數(shù)偏差,忽略次要設(shè)計(jì)參數(shù)偏差,對斜拉橋進(jìn)行更準(zhǔn)確的施工控制。
[Abstract]:The special-shaped single-tower cable-stayed bridge is a complex spatial statically inconstant system, which is composed of beams, special-shaped towers and cable-stayed cables. In the construction process of cable-stayed bridge, the program is more complex, and there are many influencing factors. In this paper, the cast-in-place special-shaped single-tower cable-stayed bridge with support in Anhui Province is taken as the research object, and the cast-in-place construction mode of the support is adopted, and the shape of the main tower of the bridge is strange. These two characteristics make the cable-stayed bridge difficult to determine the cable force in each construction stage, and the force and linearity are difficult to control. Therefore, the construction control of the cable-stayed cable has become an important link in the construction of the bridge. First of all, aiming at the research object, this paper studies the construction control technology of the bridge, and introduces in detail the construction control method, control contents and matters needing attention. On the basis of the general bridge type control, the control for cable-stayed cable and special-shaped bridge tower is added, and the temperature correction of the monitoring results is carried out, which makes the control of the research object more comprehensive, accurate and safe. Secondly, in the construction control process of cable force, based on the comprehensive comparison of rigid supported continuous beam method and bending strain energy minimum method, the cable force solution method based on constrained energy method is determined in this paper. The method of secondary tension of cable-stayed cable is adopted to solve the problem that the tension of cable-stayed cable results in the redistribution of reaction force of the support due to the cast-in-place construction of full-hall support in the process of cable-stayed cable tension, which may lead to the insufficient bearing capacity of the support. In the tension calculation of cable-stayed cable construction process, the formal analysis method is adopted. In view of the need for many tedious calculation of structural influence matrix in the calculation process, this paper adopts the off-shelf coefficient method to modify the system influence matrix through the influence matrix with support and the influence matrix without support, so as to obtain the structural influence matrix, quickly solve the construction cable force in the control process, and save time and manpower. The method is applied to the engineering background of this paper, and satisfactory results are obtained. Then, this paper introduces in detail the cable force test method and data processing in the actual construction control process of cable-stayed bridge, and introduces the frequency difference method and the new fundamental frequency method in the process of calculating the fundamental frequency by frequency method. On the basis of these two data processing methods, this paper modifies the new fundamental frequency method to find the fundamental frequency, so that the fundamental frequency is closer to the actual situation, the error is smaller, and then the cable force is more accurate. Finally, aiming at the research object, the design parameters in the bridge model are compared and analyzed theoretically, and the effects of bridge structure weight (temporary construction load), bridge overall stiffness, concrete shrinkage and creep, overall temperature on the completion state of the special-shaped single-tower cable-stayed bridge are analyzed in detail, and then the deviation of the main design parameters is corrected and the secondary design parameter deviation is ignored in the construction control process. More accurate construction control of cable-stayed bridge is carried out.
【學(xué)位授予單位】：大連交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U445.4;U448.27

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 范立礎(chǔ),杜國華,馬健中;斜拉橋索力優(yōu)化及非線性理想倒退分析[J];重慶交通學(xué)院學(xué)報(bào);1992年01期

2 童林,李傳習(xí),上官興;鋼管混凝土拱梁組合體系橋吊桿成橋索力的確定[J];長沙交通學(xué)院學(xué)報(bào);2004年03期

3 秦順全;;分階段成形結(jié)構(gòu)過程控制的無應(yīng)力狀態(tài)控制法[J];中國工程科學(xué);2009年10期

4 張政華;畢丹;李兆霞;;基于結(jié)構(gòu)多尺度模擬和分析的大跨斜拉橋應(yīng)變監(jiān)測傳感器優(yōu)化布置研究[J];工程力學(xué);2009年01期

5 淡丹輝,何廣漢;基于靜態(tài)應(yīng)變測量 橋梁結(jié)構(gòu)傳感器優(yōu)化布置法[J];工程設(shè)計(jì)CAD與智能建筑;2002年02期

6 張勁文;斜拉橋施工控制中的參數(shù)識(shí)別[J];廣東公路交通;2002年S1期

7 左云,陳明憲,趙躍宇;橋梁健康監(jiān)測及傳感器的優(yōu)化布置[J];公路;2004年04期

8 譚冬蓮;肖汝誠;;橋梁監(jiān)測系統(tǒng)中復(fù)雜結(jié)構(gòu)的靜力應(yīng)變傳感器優(yōu)化配置方法[J];公路;2006年06期

9 林志宏,徐郁峰;頻率法測量斜拉橋索力的關(guān)鍵技術(shù)[J];中外公路;2003年05期

10 陳常松;顏東煌;陳政清;;超大跨度斜拉橋的自適應(yīng)無應(yīng)力構(gòu)形控制法[J];中外公路;2008年01期

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