【摘要】：PC剛構(gòu)-連續(xù)梁組合體系橋梁綜合了連續(xù)剛構(gòu)橋和連續(xù)梁橋的優(yōu)點(diǎn)，在力學(xué)性能、使用功能和地形適應(yīng)性方面具有一定的優(yōu)越性。為確保其施工全過(guò)程的安全及成橋線形和內(nèi)力滿足設(shè)計(jì)要求，，必須對(duì)其施工全過(guò)程進(jìn)行適當(dāng)?shù)谋O(jiān)測(cè)和控制。因此，開(kāi)展PC剛構(gòu)-連續(xù)梁組合體系橋梁的施工監(jiān)控具有重要的工程應(yīng)用價(jià)值。本文以某特大橋?yàn)楣こ虒?shí)例，開(kāi)展PC剛構(gòu)-連續(xù)梁組合體系橋梁的施工全過(guò)程監(jiān)控研究，研究的主要內(nèi)容有： （1）運(yùn)用兩種不同的有限元軟件建立了某特大橋的有限元計(jì)算模型，并結(jié)合橋梁的實(shí)際材料特性和邊界條件修正了計(jì)算模型，為后續(xù)施工全過(guò)程分析和施工監(jiān)控工作奠定了基礎(chǔ)；根據(jù)大橋的實(shí)際施工過(guò)程，進(jìn)行了施工全過(guò)程的有限元分析，計(jì)算結(jié)果為制定該橋梁的施工監(jiān)控方案和預(yù)拱度設(shè)置提供理論依據(jù)。 （2）詳細(xì)介紹施工監(jiān)控系統(tǒng)建立的原則與依據(jù)，根據(jù)剛構(gòu)-連續(xù)梁組合體系橋梁的特點(diǎn)制定了某特大橋施工監(jiān)控系統(tǒng)的主要內(nèi)容，并詳細(xì)分析其施工監(jiān)控的實(shí)施細(xì)則問(wèn)題，對(duì)大橋的施工質(zhì)量和施工安全做出了詳細(xì)的要求。 （3）對(duì)比分析實(shí)測(cè)數(shù)據(jù)和理論數(shù)據(jù)，運(yùn)用反演分析進(jìn)行參數(shù)識(shí)別，進(jìn)而修正有限元模型使其與實(shí)際施工的橋梁結(jié)構(gòu)相吻合；結(jié)合實(shí)測(cè)數(shù)據(jù)和理論數(shù)據(jù)的分析了解已施工梁段的狀況，運(yùn)用自適應(yīng)控制法指導(dǎo)后續(xù)梁段的標(biāo)高和應(yīng)力控制，最終確保某特大橋施工全過(guò)程的安全、成橋線形和內(nèi)力狀態(tài)滿足設(shè)計(jì)要求。
[Abstract]:PC rigid frame continuous beam composite system bridge integrates the advantages of continuous rigid frame bridge and continuous beam bridge, and has certain advantages in mechanical properties, usage function and terrain adaptability. In order to ensure the safety of the whole construction process and the alignment and internal force of the bridge to meet the design requirements, it is necessary to properly monitor and control the whole construction process. Therefore, it is of great engineering application value to carry out the construction monitoring of PC rigid frame continuous beam composite system bridge. In this paper, taking a large bridge as an engineering example, the monitoring and control of the whole construction process of PC rigid frame continuous beam composite system bridge is carried out. The main contents of the study are as follows: (1) the finite element calculation model of a bridge is established by using two different finite element software, and the calculation model is modified according to the actual material characteristics and boundary conditions of the bridge. It lays a foundation for the analysis of the whole construction process and the construction monitoring work. According to the actual construction process of the bridge, the finite element analysis of the whole construction process is carried out, and the calculation results provide a theoretical basis for the establishment of the construction monitoring scheme and the pre-arch setting of the bridge. (2) this paper introduces in detail the principles and basis for the establishment of the construction monitoring system, formulates the main contents of the construction monitoring system of a super large bridge according to the characteristics of the rigid frame continuous beam composite system bridge, and analyzes in detail the detailed rules for the implementation of the construction monitoring system. The construction quality and construction safety of the bridge are required in detail. (3) comparing the measured data with the theoretical data, using inversion analysis to identify the parameters, and then modifying the finite element model to make it consistent with the actual construction of the bridge structure; Combined with the analysis of the measured data and theoretical data, the situation of the constructed beam section is understood, and the elevation and stress control of the subsequent beam section are guided by the adaptive control method, so as to ensure the safety of the whole construction process of a large bridge. The alignment and internal force state of the bridge meet the design requirements.
【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(lèi)號(hào)】：U445.4

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