本文關(guān)鍵詞：48m鋼筋混凝土拱板組合橋靜動(dòng)力分析　出處：《鄭州大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 拱橋 矢跨比 自振特性 反應(yīng)譜分析 主拱圈

【摘要】：拱橋作為應(yīng)用較為廣泛的橋型之一，歷史悠久、造型美觀、經(jīng)濟(jì)適用、承載潛力大。同時(shí)，拱橋這一結(jié)構(gòu)型式可以展現(xiàn)城市的建筑風(fēng)貌，因而在橋梁建設(shè)中得到廣泛應(yīng)用。 本文研究對(duì)象為拱板組合橋（Deck Arch Composite Bridge），屬于上承式空腹拱橋�；谇叭藢�(duì)拱橋研究的成果，本文結(jié)合實(shí)際工程對(duì)拱板組合橋開展了一系列研究，，主要內(nèi)容如下： （1）利用有限元軟件MIDAS Civil建立橋梁模型，分析橋梁在不同荷載工況下主拱圈受力情況，根據(jù)靜力分析結(jié)果，找出對(duì)該類橋梁起控制作用的最不利工況組合及影響該類橋梁受力的最不利因素。 （2）建立不同矢跨比橋梁模型，分析在最不利受力工況組合下，矢跨比對(duì)主拱圈受力性能的影響，從而得出相應(yīng)的規(guī)律。 （3）建立動(dòng)力分析模型，分析橋梁自振特性。 （4）輸入標(biāo)準(zhǔn)反應(yīng)譜曲線，分別考慮地震波為順橋向、橫橋向和豎橋向三種工況，分析在地震輸入作用下橋梁結(jié)構(gòu)的動(dòng)力響應(yīng)。 研究結(jié)果表明： （1）拱腳沿順橋向的水平位移和主拱圈的整體溫度變化是拱板組合橋設(shè)計(jì)的關(guān)鍵因素。 （2）在所研究的范圍內(nèi)，矢跨比的變化對(duì)主拱圈內(nèi)力及豎向位移變化的影響幅度較小，且隨矢跨比增加主拱圈內(nèi)力及豎向位移呈逐漸增大趨勢(shì)。 （3）通過對(duì)拱板組合橋的動(dòng)力分析，得到該橋梁的基本周期為1.577sec，屬于偏柔性結(jié)構(gòu)。 （4）主拱圈在受X、Y、Z三個(gè)方向地震加速度作用下的位移值表現(xiàn)為沿作用方向的響應(yīng)值遠(yuǎn)大于另外兩個(gè)方向的響應(yīng)值。
[Abstract]:As one of the widely used bridge types, arch bridge has a long history, beautiful appearance, economic applicability and great potential for bearing capacity. Meanwhile, the structure of arch bridge can show the architectural style of the city, so it has been widely applied in bridge construction.
The object of this paper is the Deck Arch Composite Bridge. It belongs to the open top hollow arch bridge. Based on the previous research results of arch bridge, combined with practical engineering, a series of research on arch bridge composite bridge is carried out. The main contents are as follows:
(1) use the finite element software MIDAS Civil to establish bridge model, analyze the stress condition of main arch ring under different load conditions. According to the static analysis result, find out the most unfavorable combination of the type of bridge and the most unfavorable factors affecting the bridge's stress.
(2) to establish a different span ratio bridge model, and analyze the influence of the span ratio on the force performance of the main arch under the combination of the most disadvantageous loading conditions, and thus the corresponding rules are obtained.
(3) the dynamic analysis model is established to analyze the self vibration characteristics of the bridge.
(4) input the standard response spectrum curve, and consider the three kinds of working conditions of the seismic wave as the longitudinal bridge, the transverse bridge and the vertical bridge respectively, and analyze the dynamic response of the bridge structure under the action of earthquake input.
The results of the study show that:
(1) the horizontal displacement of the arch foot along the CIS bridge and the overall temperature change of the main arch are the key factors for the design of the arch plate combined bridge.
(2) within the scope of the study, the influence of the rise span ratio on the internal force and vertical displacement of the main arch is relatively small, and the internal force and vertical displacement of the main arch ring tend to increase with the increase of the ratio of rise to span.
(3) through the dynamic analysis of the arch plate combined bridge, the basic period of the bridge is 1.577sec, which belongs to the partial flexible structure.
(4) the displacement value of the main arch under the action of three directions of X, Y and Z is that the response value along the direction of action is far greater than the response value of the other two directions.

【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.22;U441

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