本文關(guān)鍵詞： 連續(xù)剛構(gòu)橋 施工仿真 施工監(jiān)控 穩(wěn)定性　出處：《重慶大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：連續(xù)剛構(gòu)橋是T型剛構(gòu)和連續(xù)梁相結(jié)合的一種梁式橋梁體系。憑借其優(yōu)越的受力特性、良好的經(jīng)濟(jì)效益及平穩(wěn)舒適的行車條件等優(yōu)點(diǎn)，在國(guó)內(nèi)外橋梁建設(shè)中得到了日益廣泛的應(yīng)用。連續(xù)剛構(gòu)橋無(wú)論在施工階段還是在運(yùn)營(yíng)階段，質(zhì)量和安全都應(yīng)得到充分的保障，結(jié)構(gòu)線形和受力狀態(tài)都應(yīng)滿足設(shè)計(jì)要求，尤其是在懸臂施工過(guò)程中時(shí)，橋梁處于靜定狀態(tài)，防線單一，結(jié)構(gòu)安全與穩(wěn)定容易受到威脅。因此，對(duì)連續(xù)剛構(gòu)橋進(jìn)行施工監(jiān)控是很有必要的。 本文以喇嘛寺溝大橋?yàn)楣こ瘫尘�，，�?lái)研究連續(xù)剛構(gòu)橋的施工監(jiān)控問(wèn)題，以下是本文研究的主要內(nèi)容及得到的相關(guān)結(jié)論： ①以位移有限元方法為基礎(chǔ)研究與橋梁施工監(jiān)控仿真分析相關(guān)的理論。明確了喇嘛寺溝大橋需要實(shí)施施工監(jiān)控的主要項(xiàng)目及橋梁施工監(jiān)控的分析與計(jì)算方法，建立橋梁施工監(jiān)控系統(tǒng)并闡述了影響橋梁施工監(jiān)控的因素。 ②運(yùn)用橋梁結(jié)構(gòu)分析軟件CSB和MIDAS/Civil建立大橋的有限元模型，對(duì)其施工全過(guò)程進(jìn)行模擬計(jì)算。將兩個(gè)軟件的計(jì)算結(jié)果進(jìn)行分析和校核，結(jié)合已有的工程經(jīng)驗(yàn)，認(rèn)為喇嘛寺溝大橋的線形、內(nèi)力和應(yīng)力等仿真結(jié)果是可靠和有效的，可用來(lái)對(duì)大橋?qū)嵤┈F(xiàn)場(chǎng)施工監(jiān)控。 ③按照既定的施工監(jiān)控方案對(duì)大橋?qū)嵤┈F(xiàn)場(chǎng)監(jiān)控工作，著重闡述大橋在實(shí)際施工過(guò)程中幾何線形和截面應(yīng)力的控制要點(diǎn)，并將監(jiān)控成果進(jìn)行分析。線形控制方面，主梁標(biāo)高誤差控制在±9mm范圍內(nèi)，中線偏位控制在±8mm范圍內(nèi)，最終實(shí)現(xiàn)了大橋的高精度合龍；應(yīng)力控制方面，截面實(shí)測(cè)與理論應(yīng)力誤差基本控制在±1MPa范圍內(nèi)，結(jié)果合理，結(jié)構(gòu)應(yīng)力利用空間充分。 ④對(duì)大橋?qū)嵤┦┕るA段穩(wěn)定性分析的必要性進(jìn)行了闡述，利用MIDAS/Civil中的屈曲分析模塊分別計(jì)算了1號(hào)墩處于裸墩狀態(tài)和最大懸臂狀態(tài)時(shí)，結(jié)構(gòu)在不同工況作用下的臨界荷載系數(shù)，再根據(jù)計(jì)算結(jié)果提出了保證結(jié)構(gòu)在施工階段中安全穩(wěn)定的建議和措施。結(jié)果表明，結(jié)構(gòu)在各荷載工況作用下均不存在失穩(wěn)問(wèn)題，橋梁安全穩(wěn)定可以得到保障。
[Abstract]:Continuous rigid frame bridge is a girder bridge system T type rigid frame and continuous beam combination. By virtue of its excellent mechanical properties, good economic benefits and comfortable driving conditions and other advantages, is widely used in bridge engineering at home and abroad. Both in the continuous rigid frame bridge construction stage or in the operation stage quality and safety, should be adequately protected, the structure force and linear state should meet the design requirements, especially in the cantilever construction process, the bridges are in static state, single line, structure safety and stability of vulnerable. Therefore, the continuous rigid frame bridge construction monitoring is necessary.
In this paper, the construction monitoring problem of continuous rigid frame bridge is studied under the background of Lama Valley Bridge. The following are the main contents and conclusions of this paper.
With the displacement finite element method based on bridge construction monitoring and simulation analysis of related theory. The analysis and calculation method of main bridge construction monitoring project and the Lama Sigou bridge requires the implementation of construction monitoring, the establishment of bridge construction monitoring system and discusses the influencing factors of the bridge construction monitoring.
The use of bridge structure finite element analysis software CSB and MIDAS/Civil to establish the bridge model, the whole construction process was simulated. The calculation results of the two software analysis and verification, combined with the existing engineering experience, that the linear Lama Temple ditch bridge, internal force and stress of the simulation results is reliable and effective. Can be used to implement the construction site monitoring of the bridge.
The implementation of on-site monitoring of bridge construction monitoring program in accordance with the established, focusing on the control points of stress bridge geometry in the actual construction process of linear and cross section, and the monitoring results are analyzed. The linear control, the elevation error is controlled within the range of 9mm, midline deviation is controlled within the range of 8mm, the final the closure of high precision bridge; stress control, measurement and theoretical section stress error is controlled within the range of 1MPa, the result is reasonable, full use of space structure stress.
The necessity of the analysis of the stability of construction stage of the bridge are described, the buckling analysis module in MIDAS/Civil were calculated at the pier No. 1 pier and the maximum cantilever state, the critical load coefficient of the structure in different conditions, according to the calculation result, put forward suggestions and measures to ensure the security and stability of the structure during the construction phase. The results show that the structure in different load conditions there are no instability problems, the bridge safety and stability can be guaranteed.

【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.23;U445.4

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本文編號(hào)：1555877