本文關(guān)鍵詞：大噸位索力斜拉橋索塔錨固區(qū)鋼錨箱段力學(xué)特性分析　出處：《重慶交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 斜拉橋 稀索 單索面 索塔錨固區(qū) 鋼錨箱 應(yīng)力分析

【摘要】：斜拉橋索塔錨固區(qū)是斜拉橋索塔上的關(guān)鍵部位，斜拉索的局部應(yīng)力將通過(guò)索塔錨固區(qū)安全、均勻地傳遞到索塔塔柱中去。由于斜拉索的局部應(yīng)力很大、預(yù)應(yīng)力鋼筋的錨固力等因素的影響導(dǎo)致該區(qū)域受力變得十分復(fù)雜。因此，對(duì)于斜拉橋索塔錨固區(qū)鋼錨箱節(jié)段力學(xué)特性分析的研究一直以來(lái)都是橋梁界重點(diǎn)關(guān)注的領(lǐng)域，索塔錨固區(qū)的設(shè)計(jì)和施工也是整個(gè)斜拉橋的難點(diǎn)和關(guān)鍵部分。本文以重慶東水門長(zhǎng)江大橋?yàn)閷?shí)際工程背景，主要針對(duì)該斜拉橋索塔錨固區(qū)鋼錨箱節(jié)段處進(jìn)行詳細(xì)的空間有限元理論分析。 本文在介紹斜拉橋的發(fā)展史和國(guó)內(nèi)外的發(fā)展現(xiàn)狀，總結(jié)各種斜拉橋特點(diǎn)和實(shí)用范圍的基礎(chǔ)上；重點(diǎn)闡述了斜拉橋索塔錨固區(qū)的構(gòu)造方式和發(fā)展情況，總結(jié)了索塔錨固區(qū)的各種鋼錨箱構(gòu)造、受力特性。 本文以重慶東水門長(zhǎng)江大橋天梭型索塔為研究對(duì)象，大橋?yàn)殡p塔稀索單索面斜拉橋，單根斜拉索索力較大，使得鋼錨箱節(jié)段受力也較大。首先運(yùn)用有限元軟件Midas Civil建立的全橋整體空間有限元模型，對(duì)該橋工程施工各階段及運(yùn)營(yíng)階段進(jìn)行分析，根據(jù)分析得出的結(jié)果，找到所有階段中鋼錨箱錨固段的最不利受力情況，再采用有限元軟件Midas FEA建立的主塔最不利錨固區(qū)局部實(shí)體單元模型，分析主塔錨固區(qū)局部受力特性，明確該位置位移變化情況、主拉應(yīng)力、主壓應(yīng)力的分布狀態(tài)及大小，，對(duì)其安全性進(jìn)行了評(píng)估，為橋梁施工、設(shè)計(jì)提供了優(yōu)化方案，最后，提出了本項(xiàng)目有待更進(jìn)一步研究的一些思考。
[Abstract]:The cable tower Anchorage area of the cable-stayed bridge is the key part of the cable-stayed bridge tower. The local stress of the stay cable will be safely transferred to the tower column through the cable tower Anchorage area. The local stress of the stay cable is very large. The influence of the anchoring force of prestressed steel bar makes the force in this area become very complicated. For cable-stayed bridge cable tower Anchorage zone steel anchor section of the mechanical characteristics of the study has always been the focus of attention to the field of bridge boundaries. The design and construction of cable tower Anchorage area is also the difficult and key part of the whole cable-stayed bridge. This paper takes the Dongshuimen Yangtze River Bridge in Chongqing as the actual engineering background. The spatial finite element analysis of the steel anchor box section in the cable tower Anchorage area of the cable-stayed bridge is carried out in detail. This paper introduces the development history of cable-stayed bridge and the development situation at home and abroad, summarizes the characteristics and practical scope of various cable-stayed bridges. The structure and development of cable tower Anchorage area of cable-stayed bridge are described emphatically, and various kinds of steel anchor box structure and mechanical characteristics of cable tower Anchorage area are summarized. This paper takes the Tianshuo cable tower of the Dongshuimen Yangtze River Bridge in Chongqing as the research object. The bridge is a cable-stayed bridge with two towers and one cable plane, and the single cable force is relatively large. The steel anchor box section is also subjected to a large force. Firstly, the whole space finite element model of the whole bridge is established by using the finite element software Midas Civil, and the construction and operation stages of the bridge are analyzed. According to the results of the analysis, find out the most unfavorable stress condition of the anchoring section of steel anchor box in all stages, and then use the finite element software Midas FEA to establish the local solid element model of the most unfavorable anchoring zone of the main tower. This paper analyzes the local stress characteristics of the Anchorage area of the main tower, determines the displacement change of the position, the distribution state and size of the main tensile stress and the main compressive stress, and evaluates its safety for the bridge construction. The design provides the optimization scheme, and finally, puts forward some thinking about the project to be further studied.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.27

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