本文選題：拆除 + 有限元建模��； 參考：《西南交通大學(xué)》2017年碩士論文

【摘要】：部分先期建造的橋梁,因其不能適應(yīng)當(dāng)今交通事業(yè)的蓬勃發(fā)展而被拆除再建,其中舊橋拆除過(guò)程難度大、風(fēng)險(xiǎn)高,存在很多不確定因素和隱患,為保證橋梁拆除過(guò)程的安全性,有必要利用各種現(xiàn)代化手段和計(jì)算機(jī)輔助程序包括各種通用有限元計(jì)算軟件,為拆除工程中的方案設(shè)計(jì)和施工監(jiān)控保駕護(hù)航。本文在借鑒以往研究的基礎(chǔ)上,以青口互通立交橋的B匝道第三聯(lián)拆除施工為例,針對(duì)其結(jié)構(gòu)體系、工程規(guī)模和周邊環(huán)境等,利用方案比選尋找最佳拆除方式,確定了總體施工方案并完善了整個(gè)拆除工序。建立了可以較真實(shí)反映實(shí)際工程的整體式有限元模型,實(shí)現(xiàn)各個(gè)拆除過(guò)程的仿真模擬,在此基礎(chǔ)上對(duì)拆除各施工階段結(jié)構(gòu)受力變形情況進(jìn)行了計(jì)算分析,對(duì)支撐系統(tǒng)的穩(wěn)定性進(jìn)行驗(yàn)算,為智能預(yù)警監(jiān)控系統(tǒng)提供了控制指標(biāo)和技術(shù)保障,確保拆除過(guò)程在安全可控范圍。本文的研究可以給以后類似工程提供技術(shù)上的指導(dǎo)和分析思路,將有限元模擬分析和現(xiàn)代施工工法相結(jié)合,可以切實(shí)掌握當(dāng)前階段結(jié)構(gòu)受力狀況、對(duì)后續(xù)工況進(jìn)行預(yù)測(cè)、下達(dá)預(yù)警指令即時(shí)改進(jìn)施工過(guò)程、保證工程質(zhì)量,不僅能夠使拆除過(guò)程安全進(jìn)行,其更大的價(jià)值在于,能夠適應(yīng)各種復(fù)雜環(huán)境下,復(fù)雜橋型的拆除,豐富和創(chuàng)新舊橋的拆除方法。
[Abstract]:Some of the bridges built in advance have been demolished and rebuilt because of their inability to adapt to the booming development of the transportation industry today. The old bridges are difficult to demolish and have a high risk. There are many uncertain factors and hidden dangers in order to ensure the safety of the bridge demolition process. It is necessary to use all kinds of modern means and computer aided programs, including all kinds of general finite element calculation software, to protect the scheme design and construction monitoring in demolition engineering. Based on the previous research, taking the third demolition of B ramp of Qingkou Interchange Bridge as an example, aiming at its structure system, project scale and surrounding environment, this paper makes use of scheme comparison to find out the best demolition method. The overall construction plan is determined and the whole demolition procedure is improved. The integral finite element model, which can truly reflect the actual project, is established, and the simulation of each demolition process is realized. On the basis of this, the stress and deformation of the structure in each stage of demolition are calculated and analyzed. The stability of the support system is checked and calculated, which provides the control index and technical guarantee for the intelligent early-warning monitoring system, and ensures that the demolition process is in the safe and controllable range. The research in this paper can provide technical guidance and analysis ideas for similar projects in the future. Combining finite element simulation analysis with modern construction method, we can really grasp the stress state of the structure at present stage and predict the subsequent working conditions. Issuing early warning instructions to improve the construction process and ensure the engineering quality can not only make the demolition process safe, but also be able to adapt to the demolition of complex bridges in various complex environments. Enrich and innovate the old bridge demolition method.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U445.6

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