本文選題：重載運(yùn)輸　切入點(diǎn)：搶修鋼梁　出處：《石家莊鐵道大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：重載運(yùn)輸是世界鐵路發(fā)展的主要方向之一,我國(guó)鐵路重載運(yùn)輸?shù)陌l(fā)展既充分借鑒了國(guó)外鐵路重載運(yùn)輸?shù)南冗M(jìn)經(jīng)驗(yàn),又注重結(jié)合國(guó)情路情實(shí)現(xiàn)自主創(chuàng)新,經(jīng)過(guò)幾年的努力,在實(shí)踐中取得了十分顯著的成效。重載鐵路運(yùn)輸?shù)目焖侔l(fā)展提高了鐵路的運(yùn)輸能力和經(jīng)濟(jì)效益,但列車軸重提高和編組增加給既有鐵路橋梁的搶修帶來(lái)了嚴(yán)重的影響。目前,儲(chǔ)備的搶修鋼梁大都是幾十年前研制的,其能承受的荷載大小是根據(jù)當(dāng)時(shí)的需求和科技發(fā)展水平確定的,因此,這樣的搶修鋼梁用于重載橋梁搶修,可能會(huì)出現(xiàn)搶修鋼梁承載能力不足等問(wèn)題。為保障鐵路高效安全的運(yùn)行,并最大程度的發(fā)揮既有搶修鋼梁的潛力,對(duì)既有搶修鋼梁按照現(xiàn)行新的規(guī)范和大軸重重載運(yùn)輸工況進(jìn)行重新計(jì)算,并對(duì)結(jié)果進(jìn)行分析研究。分析既有拆裝式桁梁在現(xiàn)行的中-活載以及不同軸重的ZH活載作用下的受力特性,為其安全用于當(dāng)前既有鐵路橋梁和重載鐵路橋梁的搶修提供技術(shù)支持,為我國(guó)重載鐵路的發(fā)展提供應(yīng)急保障。本文依據(jù)《鐵路橋梁搶修通用圖集》,以搶修鋼梁-拆裝式桁梁為研究對(duì)象,運(yùn)用ANSYS軟件對(duì)桁梁有待解決的問(wèn)題進(jìn)行深入的探究:首先,基于有限元理論和拆裝梁的特點(diǎn),利用大型有限元計(jì)算軟件ANSYS提供的參數(shù)化語(yǔ)言APDL,建立了科學(xué)、較為精確的不同跨度及結(jié)構(gòu)形式的拆裝式桁梁參數(shù)化模型,然后依據(jù)拆裝式桁梁的原設(shè)計(jì)荷載、中-活載以及不同軸重的ZH活載的荷載圖式,給桁梁施加載荷,在ANSYS軟件中對(duì)桁梁進(jìn)行結(jié)構(gòu)的強(qiáng)度、剛度、穩(wěn)定性以及模態(tài)的分析,并對(duì)得出的結(jié)果依據(jù)《鐵路橋梁搶修(建)技術(shù)規(guī)程》進(jìn)行校核。另外,通過(guò)計(jì)算拆裝式桁梁的內(nèi)力,分析得出每一種跨度拆裝梁的薄弱部位,以及不同跨度和結(jié)構(gòu)形式的拆裝梁的受力差異,得出不同跨度、不同拼組形式的拆裝梁結(jié)構(gòu)受力性能的變化規(guī)律,為將來(lái)用于重載鐵路橋梁的搶修工程提供技術(shù)支撐。
[Abstract]:Heavy haul transportation is one of the main directions of railway development in the world. The development of heavy haul railway transportation in our country not only draws lessons from the advanced experience of foreign railway heavy haul transportation, but also pays attention to realizing independent innovation according to the national conditions. The rapid development of heavy haul railway transportation has improved the transportation capacity and economic benefit of railway, but the increase of axle load and formation of trains has brought serious influence to the urgent repair of existing railway bridges. Most of the steel beams in stock were developed decades ago, and the amount of load they can withstand is determined according to the demand at that time and the level of development of science and technology. Therefore, such urgent repair steel beams are used for emergency repair of heavy-haul bridges. In order to ensure the efficient and safe operation of the railway, and to maximize the potential of repairing the existing steel beams, According to the current new code and heavy load transportation conditions of heavy axle load, the existing rapid-repair steel beams are recalculated. The results are analyzed and studied. The mechanical characteristics of the existing disassembled truss beams under the current mid-live load and ZH live load with different axle loads are analyzed. To provide technical support for emergency repair of existing railway bridges and heavy haul railway bridges, This paper, based on the General Atlas of Railway Bridge repair, takes the steel beam-disassembly truss beam as the research object, and makes a deep research on the problems to be solved by using ANSYS software: first of all, Based on the finite element theory and the characteristics of disassembling and assembling beams, a scientific and accurate parametric model of disassembly truss beams with different span and structure form is established by using the parameterized language provided by the large finite element calculation software ANSYS. Then according to the original design load of the disassembled truss, the load schema of the mid-live load and the ZH live load of different axle load, the load is applied to the truss beam, and the strength, stiffness, stability and mode of the truss beam are analyzed in the ANSYS software. In addition, by calculating the internal forces of the disassembled truss beams, the weak parts of each span are obtained by calculating the internal forces of the disassembled truss beams, and the results obtained are based on the Technical regulations for the urgent repair (Construction) of Railway Bridges. And the stress difference of disassembling and assembling beam with different span and structure form is obtained, and the change rule of mechanical performance of disassembling and assembling beam structure with different span and different assembling form is obtained, which will provide technical support for the urgent repair project of heavy haul railway bridge in the future.
【學(xué)位授予單位】：石家莊鐵道大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U216;U445.7

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 夏勝利;楊浩;張進(jìn)川;晁陽(yáng);;我國(guó)重載鐵路發(fā)展模式研究[J];鐵道運(yùn)輸與經(jīng)濟(jì);2011年09期

2 王京偉;;山西中南鐵路通道煤炭運(yùn)量及流向分析[J];鐵道運(yùn)輸與經(jīng)濟(jì);2010年12期

，

本文編號(hào)：1637830