本文選題：鋼管混凝土拱橋　切入點(diǎn)：施工監(jiān)控　出處：《長安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：拱橋是一種古老的橋型，曾在我國的橋梁史上寫下了光輝的歷史。鋼管混凝土系桿拱橋?yàn)闊o推力拱橋，外部靜定而結(jié)構(gòu)內(nèi)部高次超靜定，其合理的內(nèi)力狀態(tài)與理想幾何線形不但與設(shè)計有關(guān)，還要依靠合理、科學(xué)的施工方法來實(shí)現(xiàn)，為了保證橋梁結(jié)構(gòu)施工安全，達(dá)到成橋的設(shè)計目標(biāo)，提高施工質(zhì)量，需要對施工過程進(jìn)行全程的監(jiān)測控制。而系桿拱橋施工階段吊桿內(nèi)力的優(yōu)化調(diào)整，將直接影響到鋼管混凝土系桿拱橋的成橋狀態(tài)和使用性能，如何確定不同施工階段吊桿張拉力才是問題的關(guān)鍵。 本文以浙江湖州大錢港大橋的施工監(jiān)控為工程背景，，應(yīng)用大型通用有限元軟件Midas/Civil建立有限元模型對該橋進(jìn)行施工階段分析計算。以系桿拱橋施工階段索力優(yōu)化調(diào)整為本文主線，結(jié)合施工階段索力優(yōu)化理論，采用正裝迭代法計算大錢港大橋施工階段四次吊桿張拉的張拉控制力，用該結(jié)果指導(dǎo)施工，得出實(shí)測索力，將實(shí)測值與理論值進(jìn)行對比分析。并對吊桿張拉過程中的應(yīng)力、線形進(jìn)行了監(jiān)測控制，將實(shí)測結(jié)果與理論計算結(jié)果進(jìn)行分析比較。 結(jié)果表明：施工階段四次吊桿張拉實(shí)測值與理論值誤差均在10%，實(shí)測應(yīng)力與理論計算值誤差均在規(guī)范要求范圍之內(nèi)，實(shí)測線形良好。采用正裝迭代法計算的施工階段吊桿張拉控制力，能很好地指導(dǎo)施工，使成橋索力與成橋目標(biāo)索力誤差在規(guī)范要求的范圍之內(nèi)。本論文在鋼管混凝土系桿拱橋施工階段吊桿張拉力的計算方法及施工控制上進(jìn)行一些探討性的研究，研究成果具有一定的參考價值。
[Abstract]:Arch bridge is an ancient bridge type, which has written a glorious history in the history of bridges in our country. Concrete-filled steel tube tied arch bridge is a non-thrust arch bridge. The reasonable internal force state and the ideal geometric alignment are not only related to the design, but also depend on reasonable and scientific construction methods. In order to ensure the construction safety of the bridge structure, to reach the design goal of the completed bridge, and to improve the construction quality, It is necessary to monitor and control the whole construction process, and the optimal adjustment of the internal force of the suspenders in the construction stage of the tied arch bridge will directly affect the bridge state and performance of the concrete-filled steel tubular tied arch bridge. How to determine the tension of suspenders in different construction stages is the key problem. This paper takes the construction monitoring of Daqian Port Bridge in Huzhou, Zhejiang Province as the engineering background. The finite element model of the bridge is established by using the large and universal finite element software Midas/Civil to analyze and calculate the construction stage of the bridge. The main line of this paper is the cable force optimization adjustment in the construction stage of the tied arch bridge, combined with the theory of the cable force optimization in the construction stage. The tension control force of the four suspenders in the construction stage of Da-Qian Gang Bridge is calculated by using the formal iteration method. The measured cable force is obtained by using the result, and the measured value is compared with the theoretical value, and the stress in the tension process of the suspender is analyzed. The line shape is monitored and controlled, and the measured results are analyzed and compared with the theoretical results. The results show that the errors of the measured and theoretical values of the four suspenders in the construction stage are both 10, and the errors of the measured stresses and the theoretical calculated values are within the scope of the specifications. The measured line shape is good. The tension control force of the suspender in the construction stage calculated by the formal iterative method can guide the construction very well. The error of cable force and target cable force is within the range of specification. In this paper, the calculation method and construction control of the tension force of suspension rod in the construction stage of concrete-filled steel tubular tied arch bridge are studied. The research results have certain reference value.
【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】：2014
【分類號】：U448.225

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