發(fā)布時(shí)間：2018-06-18 06:42

  本文選題：獨(dú)塔單索面斜拉橋 + 抗震分析��； 參考：《河北工業(yè)大學(xué)》2014年碩士論文

【摘要】：近年來，世界范圍內(nèi)地震頻繁發(fā)生，對(duì)橋梁工程造成了極大的破壞，也帶來了巨大的經(jīng)濟(jì)和人員損失。獨(dú)塔單索面斜拉橋是橋梁中的一枝奇葩，在近年來的工程中備受青睞。由于其特殊的結(jié)構(gòu)形式,其動(dòng)力特性與普通斜拉橋有所不同，因而需要進(jìn)行專門的抗震設(shè)計(jì)研究，故對(duì)此類重要橋梁動(dòng)力特性和抗震性能的研究就是很有必要的。本文的研究對(duì)于大跨徑斜拉橋的地震反應(yīng)分析也具有一定的指導(dǎo)意義。 本文分析了橋梁震害的類型及其產(chǎn)生的原因，闡述了橋梁抗震的設(shè)防目標(biāo)和設(shè)計(jì)方法，依據(jù)《公路橋梁抗震設(shè)計(jì)細(xì)則》（JTG/T B02-01-2008），以曹妃甸工業(yè)區(qū)獨(dú)塔單索面斜拉橋?yàn)楣こ瘫尘�，考慮塔、梁之間在縱向的不同連接方式，，采用反應(yīng)譜法從抗震性能的角度分析，針對(duì)拉索垂度的非線性影響及樁—土—結(jié)構(gòu)相互作用，采用不同等級(jí)的地震動(dòng)輸入，并采用ANSYS軟件對(duì)該橋建立有限元模型，從而進(jìn)行動(dòng)力特性及抗震性能的分析。 本文根據(jù)塔、梁間在縱向的不同連接方式制定方案并進(jìn)行比選，從抗震性能的角度分析得出塔、梁間在縱向采用彈性連接裝置對(duì)結(jié)構(gòu)的抗震是有利的；對(duì)于選定的塔、梁間彈性連接方案，進(jìn)行了彈簧剛度的參數(shù)分析及彈性連接體系的優(yōu)化設(shè)計(jì)；彈性連接裝置選擇粘滯阻尼器比橡膠支承裝置更具優(yōu)勢(shì)。通過非線性時(shí)程分析，在塔梁間縱向采用設(shè)計(jì)參數(shù)為阻尼系數(shù)C=12000和速度指數(shù)ξ=0.3的阻尼器，在所提交的P1和P2地震作用下，主塔、過渡墩、樁基均能滿足性能目標(biāo)的要求，結(jié)構(gòu)基本是安全的。
[Abstract]:In recent years, earthquakes occur frequently in the world, causing great damage to bridge engineering and huge economic and personnel losses. The single tower single cable plane cable-stayed bridge is a wonderful work in the bridge, which has been favored in the project in recent years. Because of its special structural form, its dynamic characteristics are different from that of ordinary cable-stayed bridges. It is necessary to study the special seismic design, so it is necessary to study the dynamic characteristics and seismic performance of such important bridges. The study of this paper also has certain guiding significance for the seismic response analysis of long-span cable-stayed bridges.
In this paper, the types and causes of bridge earthquake damage are analyzed, and the fortification targets and design methods of bridge earthquake resistance are expounded. According to the detailed rules of the seismic design of the highway and Bridge (JTG/T B02-01-2008), the single tower single cable plane cable-stayed bridge in the Caofeidian industrial area is taken as the engineering background, and the response spectrum method is adopted to consider the different connection modes between the tower and the beam in the longitudinal direction. From the angle of seismic performance, in view of the nonlinear influence of the sag and the interaction between pile and soil structure, the input of different grades of ground motion is adopted, and the finite element model of the bridge is established by ANSYS software, so as to analyze the dynamic characteristics and seismic performance.
In this paper, according to the different connections between the towers and the beams, the scheme is formulated and selected. From the angle of the seismic performance, it is concluded that the elastic connection device between the beams is favorable to the earthquake resistance of the structure. The parameters of the spring stiffness and the advantages of the elastic connection system are analyzed for the selected tower and the elastic connection scheme between the beams. The elastic connection device selects the viscous dampers more advantageous than the rubber bearing. Through nonlinear time history analysis, the dampers with the damping coefficient C=12000 and the velocity index =0.3 are used longitudinally between the tower beams. Under the submission of the P1 and P2 earthquake, the main tower, the transition pier and the pile foundation can meet the requirements of the performance targets. The structure is basically safe.
【學(xué)位授予單位】：河北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U442.55;U448.27

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