【摘要】：大跨公鐵兩用斜拉橋因其可以使得公路和鐵路共用橋位、節(jié)約資源而得到廣泛應(yīng)用。大跨公鐵兩用斜拉橋一般連接跨海通道或位于高速鐵路的線路上。其一旦在地震下受到破壞,將會(huì)給人民的生命財(cái)產(chǎn)帶來不可估量的損失。因此,對(duì)于大跨公鐵兩用斜拉橋的減震措施研究顯得十分重要。大跨公鐵兩用斜拉橋的主梁布置形式主要有以下三種:公路和鐵路分層布置,平層布置,錯(cuò)層布置。目前,國內(nèi)外對(duì)主梁分層布置的減震措施做過一些研究,但是對(duì)于主梁平層和錯(cuò)層布置的減震措施研究較少,且大部分研究多停留在對(duì)大跨公鐵兩用斜拉橋地震作用下的反應(yīng)上,對(duì)減震阻尼器參數(shù)優(yōu)化的研究較少。因此,本文對(duì)大跨公鐵兩用斜拉橋的錯(cuò)層布置的減震措施研究和阻尼器參數(shù)優(yōu)化研究顯得十分重要。以某主跨522m大跨公鐵兩用斜拉橋?yàn)楣こ瘫尘?參考其設(shè)計(jì)圖紙,建立了該大跨公鐵兩用斜拉橋的空間動(dòng)力有限元模型。研究主要內(nèi)容包括:(1)建立了大跨公鐵兩用斜拉橋的空間彈性動(dòng)力計(jì)算模型,比較分析了縱向四種約束體系下的動(dòng)力特性、內(nèi)力和位移,得到了縱向最適合的抗震體系。(2)根據(jù)設(shè)計(jì)圖紙支座及橋墩布置方式,以縱向半漂浮體系為例,研究了結(jié)構(gòu)在設(shè)計(jì)地震作用(50年超越概率10%)輸入下的縱向地震響應(yīng)隨粘滯阻尼器參數(shù)變化的規(guī)律以及橫向地震響應(yīng)隨E型鋼阻尼器參數(shù)的變化規(guī)律。為同類大跨公鐵兩用斜拉橋阻尼器參數(shù)設(shè)置提供了參考。(3)采用模糊邏輯理論和MATLAB內(nèi)置的模糊器對(duì)阻尼器的參數(shù)進(jìn)行優(yōu)化,優(yōu)選出一組綜合減震性能最高的阻尼器參數(shù)。找到了一種阻尼器優(yōu)化快速有效的方法。(4)研究大跨公鐵兩用斜拉橋在阻尼器參數(shù)優(yōu)化后的地震響應(yīng)和抗震性能,檢驗(yàn)阻尼器的工作效果。
[Abstract]:Long-span cable-stayed bridges are widely used because they can make highways and railways share bridge sites and save resources. Long-span cable-stayed bridges are usually connected to sea-crossing passages or located on high-speed railway lines. Once damaged under the earthquake, they will bring immeasurable losses to people's lives and property. The main girder layout of long-span cable-stayed bridges is mainly divided into three types: layered layout of highway and railway, layered layout, staggered layout. At present, some research has been done on the seismic mitigation measures of the layered layout of the main girder at home and abroad, but for the layered and staggered layout of the main girder. There are few studies on seismic mitigation measures and most of the researches are mainly on the response of long-span cable-stayed bridges under earthquake, and few on the optimization of damper parameters.Therefore, it is very important to study the seismic mitigation measures and the optimization of damper parameters for staggered layers of long-span cable-stayed bridges. Based on the design drawings of 522m long-span cable-stayed bridge, the spatial dynamic finite element model of the long-span cable-stayed bridge is established. (2) Based on the design drawings and the arrangement of the piers, taking the longitudinal semi-floating system as an example, the variation of the longitudinal seismic response with the parameters of viscous dampers and the transverse seismic response with the E-shape of the structure under the input of the design earthquake action (50-year probability of exceeding 10%) are studied. (3) The parameters of the damper are optimized by using the fuzzy logic theory and the built-in fuzzy controller in MATLAB, and a group of damper parameters with the highest comprehensive damping performance are selected. Methods. (4) The seismic response and seismic performance of long-span cable-stayed bridges with high-speed rail and highway are studied after the parameters of dampers are optimized.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U442.55;U448.27

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 雷俊卿;黃祖慰;曹珊珊;劉昊蘇;桂成中;;大跨度公鐵兩用斜拉橋研究進(jìn)展[J];科技導(dǎo)報(bào);2016年21期

2 陳翔;梅新詠;;平潭海峽公鐵兩用大橋主航道斜拉橋深水基礎(chǔ)設(shè)計(jì)[J];橋梁建設(shè);2016年03期

3 聶利英;郭其遠(yuǎn);李建中;;設(shè)置縱向大型液體粘滯阻尼器的大跨斜拉橋主梁縱向運(yùn)動(dòng)阻尼水平研究[J];工程力學(xué);2015年09期

4 阮懷圣;屈愛平;何友娣;苗潤池;李龍安;;大跨度公鐵兩用鋼桁梁斜拉橋結(jié)構(gòu)地震響應(yīng)特征研究[J];橋梁建設(shè);2015年02期

5 馬馳;劉世忠;;公鐵兩用三索面斜拉橋結(jié)構(gòu)受力分析[J];鐵道建筑;2015年04期

6 郭輝;李永強(qiáng);胡所亭;班新林;;主跨532m公鐵兩用斜拉橋的地震響應(yīng)及阻尼器減震效果研究[J];鐵道建筑;2015年01期

7 秦竟熙;張明金;李永樂;;大跨度公鐵兩用斜拉橋板桁主梁受力特性研究[J];橋梁建設(shè);2014年06期

8 巫生平;張超;房貞政;;斜拉橋粘滯阻尼器設(shè)計(jì)方案及參數(shù)回歸分析[J];橋梁建設(shè);2014年05期

9 劉俊鋒;阮懷圣;寧伯偉;;三門峽黃河公鐵兩用大橋主橋減隔震設(shè)計(jì)[J];橋梁建設(shè);2014年02期

10 孫傳智;李愛群;繆長青;黎少華;喬燕;;減震結(jié)構(gòu)粘滯阻尼器參數(shù)優(yōu)化分析[J];土木建筑與環(huán)境工程;2013年01期

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本文編號(hào)：2197576