【摘要】：西部地區(qū)由于其地形、地貌條件，高墩大跨預(yù)應(yīng)力連續(xù)剛構(gòu)橋憑借其線形明快、施工簡(jiǎn)便快捷、強(qiáng)度高、跨越能力強(qiáng)的優(yōu)點(diǎn)廣泛的應(yīng)用。本文結(jié)合該橋（58+105+58），從工程實(shí)際出發(fā)建立基于Midas/Civil的施工仿真計(jì)算模型。在以下的分析計(jì)算中，計(jì)算圖式的選取和各種參數(shù)的取值都盡量反映出橋梁施工過程的實(shí)際情況，以求得到更為精準(zhǔn)的模擬結(jié)果。所做主要工作如下： （1）綜述國內(nèi)外連續(xù)剛構(gòu)橋發(fā)展現(xiàn)狀及趨勢(shì)；分析高墩大跨度連續(xù)剛構(gòu)橋的受力特點(diǎn)；闡述施工控制在橋梁建設(shè)中的必要性；簡(jiǎn)要介紹剛構(gòu)橋施工監(jiān)控國內(nèi)外研究現(xiàn)狀。 （2）闡述預(yù)應(yīng)力混凝土連續(xù)剛構(gòu)橋梁懸臂施工控制理論的基本理論、施工監(jiān)控的基本流程以及施工控制的具體內(nèi)容，重點(diǎn)分析影響連續(xù)剛構(gòu)梁橋施工控制的主要因素。 （3）運(yùn)用橋梁結(jié)構(gòu)有限元分析軟件Midas/Civil建立施工階段仿真分析模型，針對(duì)不同的合攏方案，，對(duì)比分析計(jì)算結(jié)果，主要從恒載內(nèi)力、撓度與應(yīng)力三方面對(duì)比分析兩種方案的計(jì)算結(jié)果，最終確定出合理的施工方案。 （4）結(jié)合分析計(jì)算模型，對(duì)大橋的主要影響參數(shù)進(jìn)行敏感性研究分析，主要研究相關(guān)參數(shù)誤差對(duì)結(jié)構(gòu)在施工過程中和成橋狀態(tài)的撓度、應(yīng)力的影響。依據(jù)影響程度的大小識(shí)別出主要影響參數(shù)和次要影響參數(shù)，并總結(jié)其規(guī)律，從而得出對(duì)同類橋型的設(shè)計(jì)與施工具有借鑒意義的結(jié)論。 （5）采用有限元仿真對(duì)設(shè)置下彎束與不設(shè)置下彎束分析，設(shè)置預(yù)應(yīng)力下彎束之后，使得主梁截面的壓應(yīng)力得一定程度的提高，使得主梁結(jié)構(gòu)有一定的安全儲(chǔ)備，使得運(yùn)營階段的，能夠有效的抵消部分預(yù)應(yīng)力損失，大大減少了腹板的裂縫；從而保證運(yùn)營階段的橋梁結(jié)構(gòu)的實(shí)用性和耐久性；
[Abstract]:Due to its landform and geomorphological condition, the long span prestressed continuous rigid frame bridge with high piers is widely used by virtue of its linear shape, simple and fast construction, high strength and strong span ability. Combining with the bridge (58,10558), the construction simulation model based on Midas/Civil is established in this paper. In the following analysis and calculation, the selection of calculation schemas and the values of various parameters reflect the actual conditions of the bridge construction process as far as possible, in order to obtain more accurate simulation results. The main works are as follows: (1) summarize the development status and trend of continuous rigid frame bridges at home and abroad, analyze the mechanical characteristics of long-span continuous rigid frame bridges with high piers, expound the necessity of construction control in the construction of bridges; This paper briefly introduces the research status of rigid frame bridge construction monitoring at home and abroad. (2) the basic theory of cantilever construction control theory of prestressed concrete continuous rigid frame bridge, the basic flow of construction monitoring and construction control, and the main factors influencing construction control of continuous rigid frame bridge are expounded. (3) using the finite element analysis software Midas/Civil of bridge structure, the simulation analysis model of construction stage is established. According to different closing schemes, the calculation results are compared and analyzed, mainly from the point of view of dead load internal force. The calculation results of the two schemes are compared and analyzed in three aspects of deflection and stress, and the reasonable construction scheme is finally determined. (4) based on the analysis and calculation model, the sensitivity of the main influence parameters of the bridge is studied, and the influence of the error of the related parameters on the deflection and stress of the structure during the construction process and the state of the bridge is mainly studied. According to the magnitude of influence degree, the main influence parameters and secondary influence parameters are identified, and their rules are summarized, and the conclusions of reference significance for the design and construction of similar bridges are obtained. (5) the finite element simulation is used to analyze the bending beam with or without the lower bending beam. After the pre-stressed beam is set, the compressive stress of the main beam section is increased to a certain extent, and the main beam structure has a certain safety reserve. Make the operation phase, can effectively offset part of the prestress loss, greatly reduce the cracks in the web; In order to ensure the utility and durability of the bridge structure in operation stage;
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U445.4

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