本文選題：獨(dú)塔鋼斜拉橋 + 體系　； 參考：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：獨(dú)塔鋼斜拉橋具有布置靈活、造型美觀的特點(diǎn),已被廣泛地運(yùn)用在橋梁工程當(dāng)中,但國(guó)內(nèi)外對(duì)于該橋梁體系的研究至今還比較鮮見(jiàn),設(shè)計(jì)人員在對(duì)獨(dú)塔鋼斜拉橋進(jìn)行設(shè)計(jì)時(shí)往往難以入手,甚至進(jìn)入設(shè)計(jì)誤區(qū),導(dǎo)致建成后的橋梁病害頻發(fā)。本文從一座建成獨(dú)塔鋼斜拉橋的病害入手,對(duì)比分析了與其同期完工、造型近似的獨(dú)塔鋼斜拉橋——前者運(yùn)營(yíng)過(guò)程當(dāng)中病害頻發(fā),后者運(yùn)營(yíng)階段完好。究其根本是二者體系方面的差異:索面形式不同、有無(wú)輔助墩、主梁選材不同和塔梁連接形式不同。本文以此為主線,主要研究了獨(dú)塔鋼斜拉橋主梁扭轉(zhuǎn)和單雙索面適用界限問(wèn)題、輔助墩設(shè)置及其位置優(yōu)化、主梁選材方式和塔梁連接形式對(duì)全橋的影響,補(bǔ)充和完善了獨(dú)塔鋼斜拉橋體系的設(shè)計(jì)理論。本文主要章節(jié)都采用從特殊到一般的分析方法,首先利用Midas模型分析背景工程獨(dú)塔鋼斜拉橋的力學(xué)特性,指出該橋體系設(shè)計(jì)不合理之處;再進(jìn)行大量的建模工作,并結(jié)合統(tǒng)計(jì)分析軟件SPSS總結(jié)和歸納一般獨(dú)塔斜拉橋力學(xué)特性的規(guī)律,提出用于指導(dǎo)獨(dú)塔鋼斜拉橋體系設(shè)計(jì)的理論方法。在此研究框架下,本文研究發(fā)現(xiàn)偏載作用下扭轉(zhuǎn)正應(yīng)力以主梁中心線為中心大致反對(duì)稱分布、扭轉(zhuǎn)剪應(yīng)力由加載側(cè)向遠(yuǎn)離加載側(cè)逐漸減小,利用正交試驗(yàn)和方差分析確定跨長(zhǎng)和索面形式是影響主梁扭轉(zhuǎn)的顯著因素,利用量綱分析和結(jié)構(gòu)方程法,得到了單、雙索面主梁扭轉(zhuǎn)角的函數(shù)表達(dá)式,獲得了定量確定單、雙索面適用界限的方法;利用多目標(biāo)優(yōu)化法和回歸分析,得到獨(dú)塔鋼斜拉橋輔助墩最優(yōu)設(shè)置位置估計(jì)公式,利用方差分析和回歸分析,證明和擬合出獨(dú)塔鋼斜拉橋豎彎基頻估計(jì)公式,并驗(yàn)證可行;設(shè)置對(duì)照試驗(yàn),研究主梁材料的對(duì)全橋力學(xué)特性的影響,獲得主梁材料非對(duì)稱布置的獨(dú)塔斜拉橋體系影響規(guī)律,確定獨(dú)塔斜拉橋主梁材料的選用原則;通過(guò)多組對(duì)照試驗(yàn),研究不同塔梁連接邊界形式對(duì)全橋的影響規(guī)律。本文從獨(dú)塔鋼斜拉橋體系的力學(xué)特性出發(fā),通過(guò)大量模型分析和統(tǒng)計(jì)分析得到可以用于指導(dǎo)獨(dú)塔鋼斜拉橋體系設(shè)計(jì)的理論,補(bǔ)充和完善了體系分析方法。
[Abstract]:The single-tower steel cable-stayed bridge has been widely used in bridge engineering because of its flexible arrangement and beautiful shape. However, the research on the bridge system at home and abroad is still relatively rare. It is difficult for designers to design single-tower steel cable-stayed bridge, even into the wrong design, which leads to frequent bridge diseases. Starting with the damage of a steel cable-stayed bridge with single tower, this paper compares and analyzes the same time completion and similar shape of the single-tower steel cable-stayed bridge, which is characterized by frequent diseases in the operation process, while the latter is intact in operation stage. The fundamental difference is the difference between the two systems: the form of cable plane is different, the auxiliary pier is not available, the material selection of main beam is different and the connection form of tower and beam is different. Taking this as the main line, this paper mainly studies the problems of the torsion of the main girder and the suitable limit of the single and double cable plane of the steel cable-stayed bridge with single tower, the setting of auxiliary piers and their location optimization, the influence of the material selection of the main beam and the connection form of the tower and beam on the whole bridge. The design theory of single tower steel cable-stayed bridge system is supplemented and perfected. The main chapters of this paper are from special to general analysis methods. Firstly, the Midas model is used to analyze the mechanical characteristics of the single-tower steel cable-stayed bridge in background engineering, and the unreasonable design of the bridge system is pointed out, and then a lot of modeling work is carried out. Combined with the statistical analysis software SPSS to sum up and sum up the general single tower cable-stayed bridge mechanical characteristics the theoretical method for guiding the design of single-tower steel cable-stayed bridge system is put forward. In this research frame, it is found that the torsional normal stress is approximately antisymmetric distribution centered on the center line of the main beam, and the torsional shear stress decreases gradually from the loading side to the far away from the loading side. Using orthogonal test and variance analysis to determine span length and cable plane form are significant factors affecting torsion of main beam. By using dimensional analysis and structural equation method, the functional expressions of torsion angle of single and double cable main beams are obtained, and the quantitative determination of single torsion angle is obtained. Using the method of multi-objective optimization and regression analysis, the optimal location estimation formula of auxiliary pier of single-tower steel cable-stayed bridge is obtained, and the variance analysis and regression analysis are used. The formula of estimating the fundamental frequency of vertical bending of single-tower steel cable-stayed bridge is proved and fitted, and the feasibility is verified, the influence of the material of the main beam on the mechanical properties of the whole bridge is studied, and the influence law of the single-tower cable-stayed bridge system with asymmetric arrangement of the main beam material is obtained. The selection principle of main girder material for single tower cable-stayed bridge is determined, and the influence of different connection boundary forms of tower beam on the whole bridge is studied through multi-group control tests. Based on the mechanical characteristics of single-tower steel cable-stayed bridge system, this paper obtains the theory which can be used to guide the design of single-tower steel cable-stayed bridge system through a large number of model analysis and statistical analysis, and complements and perfects the system analysis method.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U448.27

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