【摘要】：摘要：連續(xù)梁拱組合橋梁是目前得到快速發(fā)展一種橋梁。作為一種新型組合結(jié)構(gòu),能充分發(fā)揮拱的優(yōu)越性,避免橋梁墩臺承擔(dān)水平力,具有較大的豎向剛度和良好的動力性能等優(yōu)點,特別適合高標準鐵路建設(shè)的要求。本文以溫福鐵路昆陽特大橋為工程背景,通過空間三維分析軟件Ansys和Midas建立有限元模型,對下承式連續(xù)梁拱組合結(jié)構(gòu)的橫向受力和不同厚度橫隔板的設(shè)置對結(jié)構(gòu)的影響進行詳細的分析。本文主要的研究內(nèi)容包括以下方面： (1)對現(xiàn)有箱梁橫向內(nèi)力的計算方法和箱形梁結(jié)構(gòu)的常用受力理論進行了闡述。 (2)建立昆陽橋Ansys全橋三維實體模型,研究箱梁頂板上緣和下緣橫向應(yīng)力沿縱向的變化規(guī)律。分別選取邊跨區(qū)段、中跨無吊桿區(qū)段、中跨有吊桿區(qū)段位置截面,采用剛性支承法和剛性支承法加位移差法計算頂板上下緣的橫向應(yīng)力,將該結(jié)果與Ansys實體模型結(jié)果進行對比,驗證剛性支承法與剛性支承法加位移差法的適用性。 (3)建立不同厚度橫隔板的昆陽橋全橋?qū)嶓w模型,探討在自重、偏載和均布荷載作用下,橫隔板厚度的變化對結(jié)構(gòu)的支承反力、縱向彎曲受力、橫向彎曲受力和抗扭性能的影響。得出相關(guān)結(jié)論,為橫隔板的設(shè)計提供意見和參考。
[Abstract]:Absrtact: continuous beam-arch composite bridge is a kind of bridge developed rapidly at present. As a new type of composite structure, it can give full play to the superiority of arch, avoid bearing horizontal force on bridge pier and abutment, have the advantages of large vertical stiffness and good dynamic performance, etc. It is especially suitable for the requirement of high standard railway construction. In this paper, based on the engineering background of Kunyang Bridge of Wenfu Railway, the finite element model is established by using three-dimensional spatial analysis software Ansys and Midas. The influence of the transverse force of the through continuous beam and arch composite structure and the setting of the different thickness of the diaphragm on the structure are analyzed in detail. The main research contents of this paper are as follows: (1) the calculation method of transverse internal force of box girder and the common force theory of box girder structure are expounded. (2) the three-dimensional solid model of Ansys full bridge of Kunyang Bridge is established to study the variation of transverse stress along the longitudinal direction of the upper and lower edge of the top plate of box girder. The lateral stress of upper and lower edge of roof is calculated by rigid support method and rigid support method plus displacement difference method. The results are compared with the results of Ansys solid model. The applicability of rigid support method and rigid support plus displacement difference method is verified. (3) the solid model of the whole bridge of Kunyang Bridge with different thickness is established. Under the action of deadweight, deflection load and uniform load, the bearing reaction force and longitudinal bending force of the thickness of the transverse diaphragm on the structure are discussed. Effects of transverse bending force and torsional resistance. Draw relevant conclusions and provide advice and reference for the design of cross-diaphragm.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U441;U448.2

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