本文選題：自錨式懸索橋　切入點(diǎn)：配重　出處：《長沙理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：近些年來,自錨式懸索橋憑借其跨越能力大、造型美觀和適應(yīng)性強(qiáng)等特點(diǎn)在國內(nèi)越來越受工程師們的青睞。由于結(jié)構(gòu)受力和施工工藝的特點(diǎn),多數(shù)自錨式懸索橋在加勁梁的錨固段和主塔處加勁梁內(nèi)實(shí)施了不同方式的配重。本文以黃河桃花峪大橋?yàn)楣こ瘫尘?并結(jié)合該橋配重的具體實(shí)施情況,借助大型有限元軟件MIDAS CIVIL,就主塔處加勁梁的配重優(yōu)化(配重取消)前后,對(duì)黃河桃花峪大橋的成橋狀態(tài)及體系轉(zhuǎn)換等問題進(jìn)行了探討,其主要研究?jī)?nèi)容如下：(1)擬定了主塔加勁梁內(nèi)配重取消的原則,即取消配重前后主塔處梁底支座反力基本一致、取消配重后吊桿及吊桿在加勁梁上的錨固結(jié)構(gòu)受力合理、取消配重后加勁梁的線形及應(yīng)力滿足設(shè)計(jì)要求。(2)研究確定了黃河桃花峪大橋主塔處取消配重后的合理成橋狀態(tài)。通過釋放主塔附近幾對(duì)吊桿的索力,讓主塔處加勁梁的部分自重替代原有的配重,進(jìn)而確定了取消配重后的黃河桃花峪大橋的合理成橋狀態(tài),并給出了該成橋狀態(tài)下主纜無應(yīng)力長度、吊索無應(yīng)力長度和各吊索的成橋索力。(3)研究確定了取消配重后的黃河桃花峪大橋的合理體系轉(zhuǎn)換方案。針對(duì)自錨式懸索橋體系轉(zhuǎn)換施工的受力特點(diǎn),遵循體系轉(zhuǎn)換的六個(gè)原則,研究了黃河桃花峪大橋取消主塔處配重后“吊索張拉法”體系轉(zhuǎn)換的各種可行方案,并確定了最優(yōu)方案。
[Abstract]:In recent years, the self anchored suspension bridge with its large span capacity, characteristic of beautiful shape and strong adaptability more engineers favor in China more and more. Because of the characteristics of structural mechanics and construction process, the implementation of the most weight in different ways of self anchored suspension bridge in the anchorage section of stiffening girder and main tower girder in taking the Yellow River taohuayu bridge as the engineering background, combined with the specific implementation of the weight of the bridge, with the help of finite element software MIDAS CIVIL, the main tower optimization of stiffening girder weight (weight cancel) before and after discussed in the Yellow River taohuayu bridge bridge state and system transformation, the main the research contents are as follows: (1) to cancel the weight in the main tower girder principle, that the abolition of the main tower at the bottom of beam before and after weight bearing force is basically the same, cancel the anchorage structure of boom and boom on the stiffening girder of the counterweight Reasonable stress, cancel after the balance of stiffening girder and linear stress meet the design requirements. (2) study to determine the reasonable finished state of the main tower in the Yellow River taohuayu bridge. Cancel after the balance through the cable force release of the main tower near several of the main tower, part of weight at the stiffening girder instead of the original the weight, and then determine the reasonable finished state of the Yellow River after the cancellation of counterweight taohuayu bridge, and gives the bridge under the condition of zero stress length of the main cable, cable should be no bridge length and force of the slings of cable force. (3) study to determine the reasonable conversion system after the Yellow River taohuayu cancel counterweight bridge scheme. Aiming at the system transformation of self anchored suspension bridge construction mechanical characteristics, six principles of system transformation, the the Yellow River taohuayu bridge to cancel the main tower after the balance sling tension system conversion of the various options and determine the optimal. The case.

【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.25
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本文編號(hào)：1567629