本文關(guān)鍵詞： 高支架 鋼管柱 格構(gòu)柱 穩(wěn)定性　出處：《重慶交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來,我國(guó)交通基礎(chǔ)設(shè)施蓬勃發(fā)展,各種大型、特大型橋梁及立交橋日益增多。在橋梁及立交的修建過程中,支架現(xiàn)澆方式以其適用性強(qiáng),靈活多變等優(yōu)點(diǎn)得到越來越多施工方的青睞。本論文結(jié)合質(zhì)量要求高、地質(zhì)條件差、地況復(fù)雜、支架搭拆難度大、受干擾因素多及交叉作業(yè)面多的福州市瑯岐閩江大橋亭江側(cè)引橋工程,介紹了高支架的設(shè)計(jì)方法及國(guó)內(nèi)外研究現(xiàn)狀,闡述了相關(guān)規(guī)范規(guī)程中高支架各相應(yīng)構(gòu)件的構(gòu)造要求,高支架中各構(gòu)件及鋼管樁基礎(chǔ)的受力計(jì)算,高支架從搭設(shè)、預(yù)壓到拆除的施工方法及注意事項(xiàng)。并利用Midas Civil有限元軟件建立空間三維模型對(duì)高支架進(jìn)行受力分析,分析后得知:格構(gòu)柱總高度的增加及格構(gòu)柱頂端懸臂高度的增加對(duì)格構(gòu)柱的穩(wěn)定性有控制性影響,在格構(gòu)柱總高度不變的情況下,格構(gòu)柱綴條間距在一定范圍內(nèi)變化對(duì)結(jié)構(gòu)的穩(wěn)定性影響較小,但綴條間距過大則會(huì)使結(jié)構(gòu)的整體穩(wěn)定性下降較多,但四肢格構(gòu)柱在不均勻軸向力及風(fēng)荷載作用下其穩(wěn)定性并無太大變化,除此之外,材料強(qiáng)度、初始缺陷、支架的具體布置及施工等因素也會(huì)對(duì)格構(gòu)柱支架的穩(wěn)定性產(chǎn)生不利影響。
[Abstract]:In recent years, the transportation infrastructure of our country is booming, various kinds of large, super large bridges and overpass bridges are increasing day by day. In the process of bridge and interchange construction, the cast-in-place support mode has strong applicability. The advantages of flexibility and variability are more and more favored by the construction side. This paper combines the high quality requirements, poor geological conditions, complex ground conditions, and the difficulty of scaffolding. This paper introduces the design method of high support and the research status at home and abroad for the bridge approach project of Minjiang River Bridge in Luangqi River, Fuzhou, which is subject to many interference factors and many cross operation areas. The structural requirements of the corresponding components of the high support in the relevant codes and regulations, the stress calculation of each component in the high support and the steel pipe pile foundation, and the installation of the high support are described. The construction method and points for attention of pre-compaction to demolition are discussed, and the three-dimensional spatial model of high support is established by using Midas Civil finite element software. The analysis shows that the increase of the total height of lattice column has a controlling effect on the stability of lattice column, when the total height of lattice column is invariant. The variation of bar spacing of lattice columns in a certain range has little effect on the stability of the structure, but if the spacing of the bars is too large, the overall stability of the structure will decrease more. However, the stability of the truss column under the action of inhomogeneous axial force and wind load is not much changed, in addition, the material strength, initial defects. The concrete arrangement and construction of the support will also have an adverse effect on the stability of the lattice column support.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U445.57

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本文編號(hào)：1475531