本文選題：矮塔斜拉橋 + 反應(yīng)譜分析　； 參考：《重慶交通大學(xué)》2015年碩士論文

【摘要】：矮塔斜拉橋為近20年來出現(xiàn)的,是介于連續(xù)梁(剛構(gòu))橋與斜拉橋之間的一種新型橋梁。所以它的受力特性與梁橋和斜拉橋既有內(nèi)在聯(lián)系,又有本質(zhì)區(qū)別。從整體上來說,連續(xù)梁橋一般由主梁直接承受彎剪作用來抵抗豎直方向的荷載作用力,斜拉橋一般由主梁受壓和拉索受拉來抵抗豎直方向的荷載作用力,故此,主梁的受力大小和狀態(tài)的差異是上述三種橋型的根本原因所在。綜上所述,研究矮塔斜拉橋的本質(zhì)在于研究梁的受力特性。本文依托一座雙塔單索面矮塔斜拉橋——瑞麗江特大橋為工程背景,利用Midas civil 2013有限元分析軟件,采用反應(yīng)譜法和動態(tài)時程分析方法對瑞麗江特大橋進(jìn)行了動力特性及地震響應(yīng)分析。具體工作如下:①簡述了矮塔斜拉橋的發(fā)展和橋梁震害的影響及啟示②從理論上分析了矮塔斜拉橋有限元模型③瑞麗江特大橋動力特性分析④采用反應(yīng)譜對瑞麗江特大橋進(jìn)行分析,計算了縱橋向、橫橋向和豎向及三向組合作用下橋梁結(jié)構(gòu)地震響應(yīng)分析。⑤采用動態(tài)時程對瑞麗江特大橋進(jìn)行分析,利用埃爾森特羅波(ElCentro)、oakwh2波、和park040波進(jìn)一步對比,以埃爾森特羅波(ElCentro)進(jìn)行詳細(xì)的在多遇地震作用下塔和主梁某些重要截面的時程曲線圖和地震響應(yīng)分析。并進(jìn)一步研究多激勵作用下的行波效應(yīng)。
[Abstract]:Low tower cable-stayed bridge is a new type of bridge between continuous beam (rigid frame) bridge and cable-stayed bridge. Therefore, its mechanical characteristics and girder bridge and cable-stayed bridge have both internal relations and essential differences. On the whole, continuous beam bridges are generally subjected to bending and shearing directly by the main girder to resist vertical loads, while cable-stayed bridges are generally subjected to the compression of the main girder and the tension of cables to resist the vertical loads, so, The difference of the force and state of the main beam is the root cause of the above three bridge types. To sum up, the essence of studying the low tower cable-stayed bridge is to study the mechanical characteristics of the beam. Based on the engineering background of a cable-stayed bridge with two towers and single cable plane, Ruilijiang super bridge, this paper uses Midas civil 2013 finite element analysis software. The dynamic characteristics and seismic response of Ruilijiang Bridge are analyzed by using response spectrum method and dynamic time history analysis method. The concrete work is as follows: 1. The development of the cable-stayed bridge with low tower and the influence of the bridge damage and its inspiration are briefly described. 2. The finite element model of the cable-stayed bridge with low tower is analyzed theoretically, and the dynamic characteristics of the super bridge of Ruilijiang are analyzed. 4 the response spectrum is applied to the Rayleigh bridge. For the analysis of the River Bridge, Seismic response Analysis of Bridge structures under Longitudinal, Transverse and Vertical and Triaxial combined actions .5 dynamic time history is used to analyze the Ruilijiang super bridge, and further comparison between the park040 wave and the El Centro wave is used to analyze the seismic response of the bridge structure under the combined action of the longitudinal, transverse and vertical directions, and the dynamic time history is used to analyze the seismic response of the bridge structure under the combined action of the longitudinal, transverse and vertical directions. The time-history curve and seismic response analysis of some important sections of tower and main beam under frequent earthquake are carried out by El Centro. Furthermore, the traveling wave effect under multiple excitations is studied.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U441;U448.27

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