本文選題：搶修鋼梁　切入點(diǎn)：疲勞分析　出處：《石家莊鐵道大學(xué)》2017年碩士論文

【摘要】：我國(guó)鐵路鋼梁疲勞性能的研究發(fā)展緩慢,設(shè)計(jì)規(guī)范比較陳舊。針對(duì)應(yīng)急搶修鋼梁疲勞問(wèn)題的特點(diǎn)更是認(rèn)知不足,技術(shù)水平在諸多方面都無(wú)法滿足我國(guó)搶修鋼橋的要求。近年來(lái),由于我國(guó)搶修鋼梁結(jié)構(gòu)簡(jiǎn)單、裝拆迅速、隨機(jī)搭配、反復(fù)使用和一物多用等特性,而被廣泛應(yīng)用。但由于缺少相關(guān)規(guī)范的科學(xué)指導(dǎo),造成對(duì)搶修鋼梁的疲勞壽命認(rèn)識(shí)不足,使得實(shí)際使用中易發(fā)生疲勞破壞。故十分有必要開展對(duì)應(yīng)急搶修鋼梁疲勞壽命評(píng)估和抗疲勞設(shè)計(jì)方面的研究。本文依據(jù)《鋼結(jié)構(gòu)設(shè)計(jì)規(guī)范》、《鐵路橋梁搶修(建)技術(shù)規(guī)程》及概率論等相關(guān)知識(shí),以鐵路中等跨度搶修鋼梁為研究對(duì)象,運(yùn)用ANSYS等輔助軟件對(duì)該鋼梁的疲勞性能進(jìn)行深入的探究:首先,針對(duì)我國(guó)鐵路應(yīng)急搶修鋼梁現(xiàn)行規(guī)范中關(guān)于搶修鋼梁抗疲勞設(shè)計(jì)方面的不足之處,在歸納總結(jié)現(xiàn)有的抗疲勞設(shè)計(jì)方法的基礎(chǔ)上,結(jié)合搶修鋼梁使用特點(diǎn)提出了一種可供我國(guó)鐵路應(yīng)急搶修鋼梁抗疲勞設(shè)計(jì)的簡(jiǎn)易方法。其次,針對(duì)搶修鋼梁重要部位的各個(gè)受力桿件,分別以東風(fēng)4型機(jī)車和C60型敞車兩種荷載形式引發(fā)的應(yīng)力幅對(duì)其進(jìn)行疲勞分析,探求其疲勞壽命。并通過(guò)對(duì)上述兩種荷載狀態(tài)下疲勞壽命對(duì)比分析研究,明確了5節(jié)敞車與單機(jī)機(jī)車對(duì)應(yīng)的疲勞壽命相同。最后,針對(duì)搶修鋼梁同類桿件在拼組過(guò)程中可隨機(jī)互換使用、重復(fù)應(yīng)用的特性,應(yīng)用名義應(yīng)力法和概率理論等方法,探求出任意隨掛敞車數(shù)量下的桿件及整體搶修鋼梁的疲勞壽命計(jì)算方法,并進(jìn)行了單機(jī)隨掛60節(jié)C60型敞車時(shí),桿件及整體搶修鋼梁的疲勞壽命評(píng)估。
[Abstract]:The research on fatigue properties of railway steel beams in China is slow and the design code is old.In view of the characteristics of emergency repair of steel beam fatigue problem is not enough, the technical level in many aspects can not meet the requirements of the repair of steel bridges in China.In recent years, steel beams in China have been widely used because of their simple structure, rapid assembly and disassembly, random collocation, repeated use and multi-purpose.However, due to the lack of scientific guidance of the relevant codes, the fatigue life of the steel beam repaired by rush repair is not well understood, and fatigue damage is easy to occur in practical use.So it is necessary to study the fatigue life evaluation and anti-fatigue design of emergency repair steel beam.Based on the relevant knowledge of Code for Design of Steel structures, Technical Specification for Emergency repair (Construction) of Railway Bridges and probability Theory, this paper takes steel beams with medium span as the research object.The fatigue performance of the steel beam is studied by using ANSYS and other auxiliary software. Firstly, aiming at the deficiency of the fatigue design of emergency repair steel beam in the current code of railway emergency repair in our country.On the basis of summing up the existing anti-fatigue design methods, a simple method of anti-fatigue design for railway emergency repair steel beams in China is put forward according to the characteristics of emergency repair steel beams.Secondly, the fatigue life of the steel beam is analyzed by using the stress amplitude caused by the two kinds of load forms of DF _ 4 locomotive and C _ 60 type open truck, aiming at the various bearing members in the important parts of the steel beam.By comparing and analyzing the fatigue life of the above two kinds of loads, it is clear that the fatigue life corresponding to the five-section open car is the same as that of the single locomotive.Finally, aiming at the characteristics of random interchangeable and repeated application of similar steel beam members in assembling process, the nominal stress method and probability theory are applied.In this paper, the fatigue life calculation method of bar and integral repair steel beam with arbitrary number of hoist trucks is obtained, and the fatigue life evaluation of bar and integral repair steel beam is carried out when 60 sections of C60 type open car are hung on a single machine.
【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】：2017
【分類號(hào)】：U441.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陶曉燕;張玉玲;;鐵路鋼橋結(jié)構(gòu)疲勞極限狀態(tài)設(shè)計(jì)方法研究[J];鐵道工程學(xué)報(bào);2014年05期

2 高占軍;;快速鐵路橋梁搶修器材研制關(guān)鍵技術(shù)探討[J];國(guó)防交通工程與技術(shù);2013年05期

3 郭春華;任偉平;;焊接鋼橋結(jié)構(gòu)細(xì)節(jié)疲勞裂紋成因及解決對(duì)策[J];鐵道建筑;2011年04期

4 周泳濤;鮑衛(wèi)剛;翟輝;劉延芳;;公路鋼橋疲勞設(shè)計(jì)荷載標(biāo)準(zhǔn)研究[J];土木工程學(xué)報(bào);2010年11期

5 許亞峰;;正交異性橋面板鋼箱梁疲勞設(shè)計(jì)和疲勞評(píng)估規(guī)范的現(xiàn)狀研究[J];城市道橋與防洪;2010年09期

6 雷宏剛;付強(qiáng);劉曉娟;;中國(guó)鋼結(jié)構(gòu)疲勞研究領(lǐng)域的30年進(jìn)展[J];建筑結(jié)構(gòu)學(xué)報(bào);2010年S1期

7 錢冬生;;談?wù)勪摌虻钠诤蛿嗔裑J];橋梁建設(shè);2009年03期

8 楊詠漪;廖海黎;李永樂(lè);;黃浦南汊橋風(fēng)致抖振疲勞頻域分析[J];四川建筑科學(xué)研究;2009年03期

9 衛(wèi)星;李俊;強(qiáng)士中;劉德軍;;大跨鋼桁拱軌道橫梁半剛性連接的疲勞荷載[J];西南交通大學(xué)學(xué)報(bào);2008年05期

10 萬(wàn)成鋼;王海林;尚艷亮;劉杰;;鐵路中等跨度搶修鋼梁整體穩(wěn)定性有限元分析[J];國(guó)防交通工程與技術(shù);2006年04期

相關(guān)博士學(xué)位論文 前5條

1 陳列;高速鐵路下承式鋼系桿拱橋結(jié)構(gòu)行為研究[D];西南交通大學(xué);2012年

2 唐兆;機(jī)車車輛疲勞強(qiáng)度仿真分析平臺(tái)研究[D];西南交通大學(xué);2011年

3 李瑩;公路鋼橋疲勞性能及可靠性研究[D];哈爾濱工業(yè)大學(xué);2008年

4 王保良;車輛荷載作用下瀝青路面疲勞行為研究[D];長(zhǎng)安大學(xué);2008年

5 任偉平;焊接鋼橋結(jié)構(gòu)細(xì)節(jié)疲勞行為分析及壽命評(píng)估[D];西南交通大學(xué);2008年

相關(guān)碩士學(xué)位論文 前3條

1 李芹子;公路鋼結(jié)構(gòu)橋梁抗疲勞設(shè)計(jì)方法研究[D];長(zhǎng)安大學(xué);2014年

2 張揚(yáng);京滬高速鐵路濟(jì)南黃河大橋受力性能分析[D];中南大學(xué);2008年

3 羅晉明;鋼橋整體節(jié)點(diǎn)疲勞性能研究[D];西南交通大學(xué);2004年

，

本文編號(hào)：1709011