發(fā)布時(shí)間：2018-02-23 03:16

  本文關(guān)鍵詞： 梁拱組合結(jié)構(gòu) 索力優(yōu)化 最小彎曲能量法 抗震分析　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】：隨著社會(huì)的發(fā)展和進(jìn)步，特別是近些年來一些新技術(shù)的應(yīng)用，，鋼管混凝土拱橋在我國橋梁建設(shè)中占據(jù)越來越重要的作用。其中的梁拱組合結(jié)構(gòu)，以其優(yōu)異的跨越能力、良好的受力、及對(duì)地基的廣泛適用性成為最具競爭力的橋型之一。這種橋型雖然結(jié)合了梁橋和拱橋的優(yōu)點(diǎn)，但也出現(xiàn)了一些新的課題，比如梁拱組合結(jié)構(gòu)吊桿索力及抗震，需要廣大的科學(xué)工作者進(jìn)行研究。 本文以年楚河特大橋?yàn)楣こ瘫尘埃瑢?duì)梁拱組合結(jié)構(gòu)成橋階段、施工階段的吊桿索力及整個(gè)橋梁結(jié)構(gòu)抗震進(jìn)行分析研究，主要做以下幾方面的工作： 一、回顧從早期的石拱橋到鋼桁拱橋、從混凝土拱橋到鋼管混凝土拱橋的發(fā)展，簡單介紹梁拱組合結(jié)構(gòu)，回顧鋼管拱橋的研究現(xiàn)狀，尤其吊桿索力的研究和拱橋的抗震研究方面。 二、梁拱組合結(jié)構(gòu)合理成橋吊桿索力的確定。首先，介紹了三種常用的確定合理成橋索力的方法——?jiǎng)傂灾С羞B續(xù)梁法、最小彎曲能量法、剛性吊桿法，然后，使用這三種方法計(jì)算確定年楚河特大橋合理成橋狀態(tài)的索力。在分析每種方法優(yōu)劣的基礎(chǔ)上，最終選擇的成橋索力為最小彎曲能量法所計(jì)算確定的。 三、施工階段吊桿張拉索力的確定。在確定成橋索力的基礎(chǔ)上，本文對(duì)一輪張拉和兩輪張拉分別進(jìn)行分析，確定施工階段吊桿張拉力。一輪張拉分析，使用考慮施工階段的未知荷載系數(shù)功能，將施工階段索力設(shè)為單位拉力，進(jìn)行施工階段分析，然后設(shè)置約束條件，得到相應(yīng)未知荷載系數(shù)，進(jìn)而得到各施工階段的吊桿張拉索力。二輪張拉分析，先用試算法確定第一次張拉的吊桿張拉力，然后使用影響矩陣法確定第二次張拉的吊桿張拉力。 四、進(jìn)行抗震分析。在確定該梁拱組合結(jié)構(gòu)橋成橋索力的基礎(chǔ)上，對(duì)該橋進(jìn)行抗震分析。首先，進(jìn)行動(dòng)力特性分析，進(jìn)而得到該結(jié)構(gòu)的動(dòng)力特性，比如振型形狀、固有周期和頻率、振型參與系數(shù)等，然后在此基礎(chǔ)上進(jìn)行反應(yīng)譜分析和動(dòng)力時(shí)程分析。
[Abstract]:With the development and progress of society, especially the application of some new technologies in recent years, CFST arch bridge occupies more and more important role in the bridge construction in our country. The girder and arch structure, with its excellent ability to leap, good stress, and wide applicability to the foundation of the bridge has become one of the most competitive. Although this bridge combines the advantages of beam bridge and arch bridge, but there are also some new issues, such as the beam arch combination structure of Suspender Force and seismic, the need of scientific research workers.
In this paper, Nianchu River Bridge, girder and arch combination bridge structure, analysis of cable force and the whole bridge structure seismic construction boom, mainly do the following aspects of the work:
First, from the early stone arch bridge to the steel truss arch bridge, from the concrete arch bridge to the concrete filled steel tube arch bridge, the paper briefly introduces the beam arch composite structure, reviews the research status of the steel tube arch bridge, especially the study of the suspender cable force and the aseismatic research of the arch bridge.
Two, to determine the reasonable structure combined beam arch bridge suspender force. Firstly, this paper introduces three common set of rigid support continuous beam method of bridge cable force is reasonable, the minimum bending energy method, rigid hanger method, and then use these three methods to calculate and determine the reasonable cable force of Nianchu River Bridge Bridge state. Based on analyzing the merits of each method, the final selection of the cable force calculation to determine the minimum bending energy method.
Three, determine the construction stage cable force. Based on determining the cable force on the wheel tension and two tension were analyzed, determine the construction stage suspender tension. Round tension analysis, with unknown coefficient of load in construction stage, the construction stage cable force a unit of force, the construction stage analysis, and then set the constraint conditions, the corresponding unknown load coefficient, then get the cable force of each construction stage. The two round of tension analysis, first determine the first tension suspenders with trial method, then use influence matrix method to determine second tension the suspenders.
Four, seismic analysis. Based on determining the cable force of the girder and arch combination bridge structure, seismic analysis of the bridge. Firstly, the dynamic characteristic analysis, then get the dynamic properties of the structure, such as mode shape, natural period and frequency, vibration mode participation coefficient, and then on this basis the response spectrum analysis and dynamic time history analysis.

【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U442.55;U448.22

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本文編號(hào)：1525994