發(fā)布時(shí)間：2018-03-24 10:05

  本文選題：波紋鋼腹板　切入點(diǎn)：矮塔斜拉橋　出處：《長(zhǎng)安大學(xué)》2014年碩士論文

【摘要】：隨著我國(guó)大跨徑橋梁的迅速發(fā)展，波紋鋼腹板組合箱梁矮塔斜拉橋這種新興的橋梁結(jié)構(gòu)形式，憑借其結(jié)構(gòu)自重輕、建造成本低、施工周期短及抗震性能好等諸多優(yōu)點(diǎn)得到了廣泛的應(yīng)用。本文以孫武黃河大橋主橋波紋鋼腹板組合箱梁矮塔斜拉橋方案為原型，結(jié)合現(xiàn)有矮塔斜拉橋的應(yīng)用經(jīng)驗(yàn)，通過(guò)建立有限元模型，分析了波紋鋼腹板組合箱梁矮塔斜拉橋的靜力、動(dòng)力及整體穩(wěn)定性能，并進(jìn)行了主梁波紋鋼腹板剪切屈曲強(qiáng)度驗(yàn)算，主要完成了以下工作： 首先介紹了波紋鋼腹板組合箱梁矮塔斜拉橋的結(jié)構(gòu)形式與受力特點(diǎn)；闡述了波紋鋼腹板組合箱梁矮塔斜拉橋的靜力、動(dòng)力性能及穩(wěn)定性能研究現(xiàn)狀。 采用有限元方法計(jì)算波紋鋼腹板組合箱梁矮塔斜拉橋在施工階段、成橋階段及運(yùn)營(yíng)階段荷載作用下結(jié)構(gòu)的受力狀態(tài)，結(jié)果顯示，結(jié)構(gòu)受力合理，具有足夠的安全儲(chǔ)備；通過(guò)建立無(wú)斜拉索作用橋梁作為對(duì)比，重點(diǎn)分析了矮塔斜拉橋在移動(dòng)荷載作用下，主梁與斜拉索的受力狀態(tài)，結(jié)果說(shuō)明荷載主要由主梁承擔(dān)，，斜拉索對(duì)結(jié)構(gòu)受力基本無(wú)影響。 本文利用有限元方法對(duì)比分析了矮塔斜拉橋及等跨徑剛構(gòu)-連續(xù)組合梁橋的動(dòng)力特性，結(jié)果顯示二者動(dòng)力特性相類似；采用線性反應(yīng)譜分析方法進(jìn)行了橋梁結(jié)構(gòu)地震響應(yīng)分析，結(jié)果可以作為分析橋梁結(jié)構(gòu)地震響應(yīng)時(shí)上部結(jié)構(gòu)剛度的貢獻(xiàn)，應(yīng)用于矮塔斜拉橋的抗震概念設(shè)計(jì)。 最后，對(duì)矮塔斜拉橋的整體穩(wěn)定性能進(jìn)行了有限元分析，并利用經(jīng)驗(yàn)公式進(jìn)行波紋鋼腹板的剪切屈曲分析，結(jié)果表明波紋鋼腹板組合箱梁矮塔斜拉橋具有足夠的穩(wěn)定性，不會(huì)發(fā)生任何形式的失穩(wěn)。
[Abstract]:With the rapid development of long-span bridges in China, corrugated steel web box girder composite box girder cable-stayed bridge, a new type of bridge structure, with its light weight, low construction cost, Many advantages such as short construction period and good seismic performance have been widely used. This paper takes the corrugated steel web composite box girder cable-stayed bridge scheme of the main bridge of Sun Wu Yellow River Bridge as the prototype, combined with the application experience of the existing cable-stayed bridge with low tower. By establishing the finite element model, the static, dynamic and overall stability of the corrugated steel web composite box girder cable-stayed bridge with low tower is analyzed. The shear buckling strength of the corrugated steel web of the main girder is checked. This paper first introduces the structural form and mechanical characteristics of corrugated steel web composite box girder cable-stayed bridge with low tower, and expounds the research status of static, dynamic and stable performance of corrugated steel web composite box girder cable-stayed bridge with low tower. The finite element method is used to calculate the stress state of the structure of the corrugated steel web composite box girder cable-stayed bridge under the load in the construction stage, the completion stage and the operation stage. The results show that the structure is reasonable in force and has sufficient safety reserve. By establishing the bridge with no cable as a comparison, the stress state of the main beam and the cable under the moving load of the low tower cable-stayed bridge is analyzed. The results show that the load is mainly borne by the main beam, and the cable has no effect on the stress of the structure. In this paper, the finite element method is used to compare and analyze the dynamic characteristics of the cable-stayed bridge with low tower and the rigid frame-continuous composite beam bridge with equal span. The results show that the dynamic characteristics of the two bridges are similar. The linear response spectrum analysis method is used to analyze the seismic response of bridge structure. The results can be used as the contribution of the superstructure stiffness in the analysis of the seismic response of the bridge structure and can be applied to the seismic conceptual design of the cable-stayed bridge with low tower. Finally, the overall stability of the cable-stayed bridge with low tower is analyzed by finite element method, and the shear buckling of corrugated steel web is analyzed by empirical formula. The results show that the composite box girder with corrugated steel web has enough stability. There will not be any form of instability.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.27;U441

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