發(fā)布時(shí)間：2018-05-20 11:23

  本文選題：連續(xù)剛構(gòu)橋 + 施工誤差��； 參考：《長(zhǎng)安大學(xué)》2014年碩士論文

【摘要】：近年來(lái)，，隨著我國(guó)科技力量的增強(qiáng)，國(guó)內(nèi)施工人員素質(zhì)、施工裝備水平不斷提高，交通事業(yè)進(jìn)入了快速發(fā)展期。連續(xù)剛構(gòu)橋作為一種大跨度橋梁，以其施工方便、連續(xù)性好、經(jīng)濟(jì)合理等優(yōu)勢(shì)在橋梁領(lǐng)域得以廣泛應(yīng)用。由于連續(xù)剛構(gòu)橋梁多采用懸臂澆筑施工，且施工周期漫長(zhǎng)，為了保證在施工階段及成橋階段結(jié)構(gòu)內(nèi)力和線形要求，必須在施工階段做好施工監(jiān)控工作。 本文對(duì)預(yù)應(yīng)力混凝土連續(xù)剛構(gòu)橋的發(fā)展歷史和結(jié)構(gòu)力學(xué)優(yōu)點(diǎn)進(jìn)行概述，介紹了目前國(guó)內(nèi)外施工監(jiān)控技術(shù)發(fā)展的情況，指出在連續(xù)剛構(gòu)橋懸臂澆筑施工中存在的主要問(wèn)題，對(duì)施工中的誤差參數(shù)進(jìn)行分類。結(jié)合廣東省某連續(xù)剛構(gòu)橋的實(shí)際施工過(guò)程，和當(dāng)前我國(guó)施工規(guī)范要求及施工技術(shù)水平。通過(guò)在懸臂施工階段，進(jìn)行誤差參數(shù)對(duì)結(jié)構(gòu)的敏感性分析，得出在梁段超重、預(yù)應(yīng)力少?gòu)埨�、非�?duì)稱張拉、單墩梁段提前施工以及溫度變化這幾種工況下，結(jié)構(gòu)自重、預(yù)應(yīng)力、混凝土收縮徐變和溫度這四種參數(shù)對(duì)結(jié)構(gòu)的撓度的影響較大。 根據(jù)誤差參數(shù)敏感性分析的結(jié)果，利用Midas Civil有限元分析軟件進(jìn)行計(jì)算分析，根據(jù)實(shí)際施工狀況對(duì)施工參數(shù)進(jìn)行調(diào)整，對(duì)應(yīng)力監(jiān)控和線形監(jiān)控制定相應(yīng)的方案。對(duì)實(shí)際施工中出現(xiàn)的誤差狀況，結(jié)合誤差參數(shù)敏感性分析的結(jié)果和灰色理論對(duì)施工階段梁體立模標(biāo)高和應(yīng)力進(jìn)行預(yù)測(cè)和修正。最終得到良好的監(jiān)控結(jié)果。
[Abstract]:In recent years, with the strengthening of science and technology in our country, the quality of domestic construction personnel and the level of construction equipment have been improved constantly, and the transportation industry has entered a period of rapid development. As a long span bridge, continuous rigid frame bridge is widely used in the field of bridge because of its advantages of convenient construction, good continuity, reasonable economy and so on. Because the continuous rigid frame bridges are mostly constructed by cantilever pouring and the construction period is long, in order to ensure the internal force and linear requirements of the structure in the construction stage and the completion stage, it is necessary to do a good job of construction monitoring work in the construction stage. This paper summarizes the development history and structural mechanics advantages of prestressed concrete continuous rigid frame bridge, introduces the development of construction monitoring technology at home and abroad, and points out the main problems existing in the cantilever construction of continuous rigid frame bridge. The error parameters in construction are classified. Combined with the actual construction process of a continuous rigid frame bridge in Guangdong Province, the requirements and construction technology level of the current construction code in China are discussed. Through the sensitivity analysis of the error parameters to the structure in the cantilever construction stage, it is concluded that under the conditions of beam section being overweight, prestress less tensioning, asymmetric tensioning, single pier beam section construction ahead of time and temperature changing, the structure weight and prestress are obtained. The four parameters of concrete shrinkage, creep and temperature have great influence on the deflection of the structure. According to the results of sensitivity analysis of error parameters, the Midas Civil finite element analysis software is used to calculate and analyze the construction parameters. According to the actual construction conditions, the construction parameters are adjusted, and the corresponding schemes for stress monitoring and linear monitoring are worked out. Based on the results of sensitivity analysis of error parameters and grey theory, the elevation and stress of beam vertical formwork in construction stage are predicted and corrected. Finally, good monitoring results are obtained.
【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)】：U445.466;U448.23

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 張永水;灰色系統(tǒng)理論在連續(xù)剛構(gòu)橋施工誤差調(diào)整中的應(yīng)用[J];重慶交通學(xué)院學(xué)報(bào);2001年04期

2 羅毅;劉慶潭;;佛山紫洞特大橋主橋懸澆法施工撓度監(jiān)測(cè)[J];華東公路;2006年05期

3 李聞;;大跨度橋梁施工誤差預(yù)測(cè)方法[J];河南科技;2011年13期

本文編號(hào)：1914418