【摘要】：大跨度公鐵兩用斜拉橋,由于其結(jié)構(gòu)剛度大、抗風(fēng)性能好、造價(jià)相對較低的優(yōu)點(diǎn),使其成為公鐵兩用大橋設(shè)計(jì)時(shí)的首選橋型。近年來,公鐵兩用斜拉橋跨度不斷增大,乃至突破千米級,而目前對其主要設(shè)計(jì)參數(shù)和索塔錨固區(qū)還缺乏系統(tǒng)的研究。本文針對公鐵兩用斜拉橋的活載加載標(biāo)準(zhǔn)、主要設(shè)計(jì)參數(shù)和索塔錨固區(qū)局部受力性能進(jìn)行研究,主要完成了以下研究工作:(1)概述了國內(nèi)外公鐵兩用斜拉橋的發(fā)展現(xiàn)狀與結(jié)構(gòu)特點(diǎn),論述了斜拉橋結(jié)構(gòu)分析理論:有限元理論、幾何非線性理論、局部分析理論,對相關(guān)理論進(jìn)行了介紹和必要的梳理。(2)本文以某千米級公鐵兩用斜拉橋?yàn)楣こ瘫尘?采用通用有限元軟件建立斜拉橋的空間有限元計(jì)算模型。分析了合理成橋狀態(tài)下的拉索索力分布、主桁上、下弦桿豎向位移和應(yīng)力,同時(shí)計(jì)算了斜拉橋的前二十階振型。研究了千米級公鐵兩用斜拉橋的活載加載標(biāo)準(zhǔn),分析了不同活載加載長度對斜拉橋的主桁上、下弦桿豎向位移和內(nèi)力、橋塔位移和內(nèi)力及拉索索力的影響。(3)考慮橋梁主要設(shè)計(jì)參數(shù):邊跨輔助墩布置形式、邊中跨比、塔梁高跨比、主梁高跨比和主梁寬跨比,研究上述設(shè)計(jì)參數(shù)在一定范圍內(nèi)變化時(shí)結(jié)構(gòu)的靜力特性和自振特性,對比分析主要設(shè)計(jì)參數(shù)對斜拉橋靜力特性、自振特性的敏感性,總結(jié)歸納出設(shè)計(jì)參數(shù)對千米級公鐵兩用斜拉橋的影響規(guī)律。(4)選取承受拉索水平分力最大的索塔錨固區(qū)節(jié)段模型,研究了在1.1倍恒載設(shè)計(jì)索力作用下,鋼錨梁及鋼牛腿的變形及受力狀態(tài),并詳細(xì)分析了鋼錨梁各個(gè)板件的應(yīng)力狀態(tài);分析了鋼錨梁腹板加勁板在索力傳遞時(shí)的作用,并研究了不同加勁板數(shù)量、厚度、寬度下鋼錨梁頂板、底板及腹板連接位置的受力狀態(tài)。綜上所述,通過對千米級公鐵兩用斜拉橋活載加載標(biāo)準(zhǔn)、主要設(shè)計(jì)參數(shù)、索塔錨固區(qū)應(yīng)力和變形的研究,得到了有益的結(jié)論。研究的成果可供同類型橋梁設(shè)計(jì)參考。
[Abstract]:Due to its advantages of high stiffness, good wind resistance and relatively low cost, the large-span cable-stayed bridge is the first choice in the design of the bridge. In recent years, the span of double-purpose cable-stayed bridge is increasing, even breaking through the kilometer level, but the main design parameters and cable tower anchoring area are still lack of systematic research. In this paper, the main design parameters and the local mechanical behavior of cable tower anchoring zone are studied according to the standard of live load, the main design parameters and the local mechanical behavior of cable-stayed bridge. The main works are as follows: (1) the development status and structural characteristics of the cable-stayed bridges at home and abroad are summarized, and the structural analysis theories of cable-stayed bridges are discussed: finite element theory, geometric nonlinear theory, local analysis theory, and so on. The related theories are introduced and combed. (2) based on the engineering background of a kilometer class double-purpose cable-stayed bridge the spatial finite element model of cable-stayed bridge is established by using the general finite element software. In this paper, the distribution of cable force, the vertical displacement and stress of chord on main truss are analyzed, and the first twenty vibration modes of cable-stayed bridge are calculated. In this paper, the working load standard of the cable-stayed bridge is studied, and the vertical displacement and internal force of the chord on the main truss of the cable-stayed bridge with different live load length are analyzed. (3) considering the main design parameters of the bridge: the arrangement of side span auxiliary pier, the ratio of side to middle span, the ratio of tower beam height to span, the ratio of main beam height to span and the ratio of main beam width to span. The static and natural vibration characteristics of the structure are studied when the above design parameters change within a certain range. The sensitivity of the main design parameters to the static and natural vibration characteristics of cable-stayed bridges is compared and analyzed. The influence of design parameters on the cable-stayed bridge of kilometer scale is summarized. (4) the model of cable tower Anchorage zone which bears the maximum horizontal splitting force of cable is selected, and the design cable force under 1.1 times dead load is studied. The deformation and stress state of steel anchor beam and steel corbel are analyzed, and the stress state of each plate of steel anchor beam is analyzed in detail, the effect of stiffening plate of steel anchor beam web plate on cable force transfer is analyzed, and the quantity and thickness of different stiffening plate are studied. Stress state of steel anchor beam roof, bottom plate and web connection position under width. To sum up, a useful conclusion is obtained by studying the live load standard, main design parameters, stress and deformation of cable tower Anchorage zone for the cable-stayed bridge of kilometer scale. The results of the study can be used as reference for the design of the same type of bridges.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U448.27

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 呂龍;李建中;;列車制動和運(yùn)行下大跨度公鐵兩用斜拉橋縱向振動分析[J];鐵道學(xué)報(bào);2017年03期

2 鄭清剛;張燕飛;肖海珠;高宗余;;滬通長江大橋主航道橋鐵路活載加載標(biāo)準(zhǔn)研究[J];橋梁建設(shè);2016年06期

3 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

4 高宗余;梅新詠;徐偉;張燕飛;;滬通長江大橋總體設(shè)計(jì)[J];橋梁建設(shè);2015年06期

5 劉曉光;郭輝;趙欣欣;;滬通長江大橋主航道橋總體設(shè)計(jì)參數(shù)分析[J];橋梁建設(shè);2015年06期

6 張曄芝;劉劍光;張曉龍;;幾何非線性對滬通公鐵兩用長江大橋的影響[J];鐵道科學(xué)與工程學(xué)報(bào);2015年06期

7 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

8 李桂林;;超大跨度鐵路橋梁列車加載長度研究[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2015年03期

9 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

10 張敏;高宗余;陳佳;馬潤平;;千米跨度公鐵兩用鋼桁梁斜拉橋幾何非線性研究[J];橋梁建設(shè);2014年05期

相關(guān)碩士學(xué)位論文 前10條

1 張輝;大跨度公鐵兩用斜拉橋非線性靜動力特性分析[D];北京交通大學(xué);2015年

2 王鴻飛;大跨度公鐵兩用斜拉橋穩(wěn)定性分析[D];北京交通大學(xué);2015年

3 周偉光;異形獨(dú)塔斜拉橋索力優(yōu)化與橋塔局部分析[D];西南交通大學(xué);2015年

4 郭建明;大跨度多線橋梁活載加載標(biāo)準(zhǔn)研究[D];西南交通大學(xué);2015年

5 何東升;鋼錨梁—索塔水平受力機(jī)理的試驗(yàn)研究[D];湖南大學(xué);2013年

6 諸志強(qiáng);大跨度鋼桁架斜拉橋理想成橋狀態(tài)和施工階段力學(xué)行為分析[D];西南交通大學(xué);2013年

7 葉蘭洲;斜拉橋索塔錨固區(qū)受力性能研究[D];長安大學(xué);2012年

8 李君;大跨度公鐵兩用板—桁組合結(jié)構(gòu)斜拉橋關(guān)鍵部位精細(xì)有限元分析[D];中南大學(xué);2012年

9 楊林;大跨度斜拉橋索塔結(jié)構(gòu)設(shè)計(jì)與力學(xué)性能分析[D];北京交通大學(xué);2011年

10 張運(yùn)波;大跨度鐵路鋼桁斜拉橋施工階段力學(xué)行為分析[D];西南交通大學(xué);2011年

，

本文編號：2148606