本文關(guān)鍵詞： 鋼管混凝土 系桿拱 內(nèi)力計算 拱腳應(yīng)力 施工控制　出處：《蘭州交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著經(jīng)濟(jì)的快速發(fā)展，我國大力加強(qiáng)基礎(chǔ)設(shè)施建設(shè)，各類鋼管混凝土拱橋廣泛的出現(xiàn)在國家基礎(chǔ)交通建設(shè)中。它的迅速發(fā)展得益于我國經(jīng)濟(jì)突飛猛進(jìn)的發(fā)展、社會勞動社產(chǎn)率的不斷提高、冶金技術(shù)的發(fā)展和我國的實際國情，以及鋼管混凝土結(jié)構(gòu)自身具有的施工方便、自重輕、跨越能力強(qiáng)、造價低和耐久性好等一系列的優(yōu)點。 本文以某鋼管混凝土系桿拱橋為工程實際背景。在研究過程中，運用大型有限元軟件分別建立拱橋整體結(jié)構(gòu)模型和拱腳局部實體模型，通過對其在不同施工階段和荷載工況下的受力情況進(jìn)行分析，得到實際拱橋結(jié)構(gòu)受力狀況的具體描述。首先，簡述了鋼管混凝土拱橋的發(fā)展歷史，目前全球范圍內(nèi)對于拱橋整體、拱腳局部在不同荷載作用下的受力特性研究以及取得的成果，總結(jié)了在施工中鋼管混凝土拱橋所依據(jù)的施工控制原理及方法；其次，運用Midas-Civil軟件建立全橋平面桿系模型，分析了各個階段拱橋整體的受力情況，同時利用全橋有限元模型所得應(yīng)力和變形數(shù)據(jù)，對實際拱橋進(jìn)行施工監(jiān)控，監(jiān)控成果基本達(dá)到設(shè)計預(yù)期的目標(biāo)，滿足控制目標(biāo)要求。最后，通過ANSYS軟件建立拱腳局部實體模型，分析拱腳在恒載作用下的受力情況，將所得拱腳附近系梁和拱肋應(yīng)力情況與整體模型中相比較，在兩種模型中，，拱腳受力情況大致相同，有較小誤差，基本符合實際受力情況。在ANSYS建模過程中將拱肋截面按照截面換算原則進(jìn)行換算，同時，對系梁的部分截面進(jìn)行了適當(dāng)?shù)暮喕�，其余部分尺寸�?yán)格按照設(shè)計要求給出。
[Abstract]:With the rapid development of economy, our country strengthens the construction of infrastructure, and all kinds of concrete-filled steel tubular arch bridges are widely used in the national basic traffic construction. Its rapid development benefits from the rapid development of our country's economy. With the increasing production rate of social labor agency, the development of metallurgical technology and the actual situation of our country, as well as the construction convenience, light weight, strong span ability, low cost and good durability of concrete-filled steel tube structure, etc. In this paper, a concrete-filled steel tubular tied arch bridge is taken as the engineering background. In the course of the research, the whole structure model of the arch bridge and the local solid model of the arch foot are established by using the large-scale finite element software, respectively. The concrete description of the actual arch bridge structure is obtained by analyzing the stress condition of the arch bridge under different construction stages and load conditions. Firstly, the development history of the concrete filled steel tube arch bridge is briefly described. At present, for the whole arch bridge in the whole world, the stress characteristics of arch foot under different loads and the results obtained are summarized. The construction control principle and method of concrete-filled steel tube arch bridge in construction are summarized. Secondly, The plane bar system model of the whole bridge is established by using Midas-Civil software, and the stress situation of the arch bridge in each stage is analyzed. At the same time, the stress and deformation data obtained from the finite element model of the whole bridge are used to monitor the construction of the actual arch bridge. The monitoring results basically reach the expected goal of the design and meet the requirements of the control goal. Finally, the local solid model of arch foot is established by ANSYS software, and the stress situation of arch foot under dead load is analyzed. The stress of the beam and rib near the arch foot is compared with that in the whole model. In the two models, the stress of the arch foot is approximately the same and the error is small. In the process of ANSYS modeling, the section of arch rib is converted according to the principle of section conversion. At the same time, the section of tie beam is simplified properly, and the other parts are given according to the design requirements.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U441;U448.22

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