【摘要】：波形鋼腹板組合箱梁是一種新型的鋼—混凝土組合結(jié)構(gòu),由混凝土頂?shù)装濉⒉ㄐ武摳拱迦糠纸M成,在日本和歐洲等國已得到較為廣泛的應(yīng)用。波形鋼腹板組合箱梁與傳統(tǒng)的混凝土腹板箱梁相比,因其優(yōu)良的結(jié)構(gòu)特性,具有十分廣闊的應(yīng)用前景。但與傳統(tǒng)箱梁結(jié)構(gòu)相比,目前尚缺乏相應(yīng)的設(shè)計條例和規(guī)范,處于起步階段。本文在已有研究的基礎(chǔ)上,基于剛接梁法,針對波形鋼腹板組合箱梁橋荷載橫向分布系數(shù)的“傳統(tǒng)剛接梁”算法進(jìn)行了修正,并建立修正剛接梁法的力學(xué)計算模型,通過與模型實(shí)驗(yàn)、有限元結(jié)果以及傳統(tǒng)剛接梁計算結(jié)果對比,驗(yàn)證了其合理性和精度。具體研究內(nèi)容和結(jié)論如下:(1)基于有限元軟件Midas Fea建立的單箱三室波形鋼腹板箱梁空間有限元模型,分析了偏心荷載和扭轉(zhuǎn)荷載作用下波形鋼腹板組合箱梁跨中截面頂?shù)装濉⒏拱宓膽?yīng)力特點(diǎn)和豎向撓度的變化規(guī)律。分析結(jié)果表明:在扭轉(zhuǎn)荷載作用下,波形鋼腹板組合箱梁頂?shù)装蹇缰薪孛嫜貦M向的豎向位移均呈直線變化,偏心荷載作用下箱梁的頂?shù)装蹇缰薪孛鏅M向撓度與相應(yīng)純扭狀態(tài)的橫向撓度差值呈水平直線變化,說明波形鋼腹板組合箱梁表現(xiàn)出整體抗彎和整體抗扭的特點(diǎn),與傳統(tǒng)箱梁的抗彎抗扭特點(diǎn)一致,經(jīng)典箱梁理論可適用于波形鋼腹板組合箱梁橋。(2)基于剛接梁法原理,引入“拆分”思想,提出了適用于波形鋼腹板組合箱梁計算的“修正剛接梁法”并建立了相應(yīng)的力學(xué)計算模型,研究表明:建立修正剛接梁法的力學(xué)計算模型的關(guān)鍵是補(bǔ)全波形鋼腹板組合箱梁切口處的頂?shù)装遒樣嗔?波形鋼腹板箱梁的箱室每增加一個,力學(xué)模型的參量增加五個,為提高效率,提出了計算機(jī)的編程流程。(3)基于“傳統(tǒng)剛接梁法”和相關(guān)文獻(xiàn)的研究成果,推導(dǎo)了“修正剛接梁法”的計算公式,并給出“修正剛接梁法”計算波形鋼腹板組合箱梁橫向分布系數(shù)的計算流程。(4)基于某模型實(shí)驗(yàn)結(jié)果,運(yùn)用“修正剛接梁法”計算該模型實(shí)驗(yàn)橋在不同工況作用下的橫向分布系數(shù),并以截面應(yīng)力、支座反力、撓度為指標(biāo),與傳統(tǒng)剛接梁法計算結(jié)果、有限元結(jié)果、模型實(shí)驗(yàn)結(jié)果進(jìn)行對比,結(jié)果表明:修正剛接梁法能夠較好的適用于波形鋼腹板組合箱梁橋的橫向分布系數(shù)計算,且相對于“傳統(tǒng)剛接梁法”有更高計算精度。(5)通過設(shè)置不同工況改變荷載作用位置,分析了荷載作用位置對波形鋼腹板組合箱梁的彎矩橫向分配的影響,結(jié)果表明:荷載作用的縱向位置對彎矩的橫向分布影響較小,實(shí)際工程中彎矩橫向分布系數(shù)沿橋跨可統(tǒng)一采用由“修正剛接梁法”計算的跨中截面的橫向分布系數(shù)。
[Abstract]:The corrugated steel web composite box girder is a new type of steel-concrete composite structure, which consists of concrete top and bottom slab and corrugated steel web. It has been widely used in Japan and Europe. Compared with the traditional concrete web box girder, the corrugated steel web composite box girder has a very broad application prospect because of its excellent structural characteristics. However, compared with the traditional box girder structure, there is still a lack of corresponding design regulations and specifications, so it is still in its infancy. Based on the previous research and the rigid-connected beam method, the "traditional rigid-connected beam" algorithm of load transverse distribution coefficient of composite box girder bridge with corrugated steel webs is modified, and the mechanical calculation model of modified rigid-jointed beam method is established. Compared with model experiment, finite element method and traditional rigid beam calculation, the rationality and accuracy of the method are verified. The specific research contents and conclusions are as follows: (1) based on the finite element software Midas Fea, the spatial finite element model of single-box three-compartment corrugated steel web box girder is established, and the top-bottom plate of the mid-section of the composite box girder with corrugated steel web under eccentric load and torsional load is analyzed. The stress characteristics of web and the variation of vertical deflection. The results show that the vertical displacement of the top and bottom span of the composite box girder with corrugated steel webs varies in a straight line under torsional load. Under eccentric load, the transverse deflection of the middle section of the top and bottom slab of the box girder varies in a horizontal straight line with the transverse deflection of the corresponding pure torsion, which shows that the composite box girder with corrugated steel webs shows the characteristics of overall bending resistance and overall torsion resistance. The classical box girder theory can be applied to the composite box girder bridge with corrugated steel webs. (2) based on the principle of rigid-connected beam method, the idea of "split" is introduced. A modified rigid-jointed beam method for the calculation of composite box girders with corrugated steel webs is proposed and the corresponding mechanical calculation model is established. The results show that the key to establish the model of modified rigid-jointed beam method is to supplement the top and bottom plate Yu Li at the notch of the composite box girder with corrugated steel webs, and the parameters of the mechanical model are increased by five for each additional box chamber of the corrugated steel web box girder. In order to improve the efficiency, the programming flow of the computer is put forward. (3) based on the research results of the traditional rigid-connected beam method and related literature, the calculation formula of "modified rigid-bonded beam method" is derived. The calculation flow of transverse distribution coefficient of composite box girder with corrugated steel webs is given. (4) based on the experimental results of a certain model, the flow chart of calculating the transverse distribution coefficient of composite box girder with corrugated steel webs is given. The transverse distribution coefficient of the model experimental bridge under different working conditions is calculated by "modified rigid-bonded beam method". The cross section stress, bearing reaction force and deflection are taken as indexes, which are compared with the traditional rigid-bonded beam method and the finite element results. The results of the model experiments show that the modified rigid-jointed beam method can be used to calculate the transverse distribution coefficient of the composite box girder bridge with corrugated steel webs. Compared with the traditional rigid-connected beam method, it has higher calculation precision. (5) the influence of load position on transverse distribution of bending moment of corrugated steel web composite box girder is analyzed by setting different working conditions. The results show that the longitudinal position of load has little effect on the transverse distribution of bending moment, and the transverse distribution coefficient of moment along bridge span can be uniformly calculated by "modified rigid beam method" in practical engineering.
【學(xué)位授予單位】：廣州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：U448.216

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李茂良;;波形鋼腹板預(yù)應(yīng)力混凝土簡支梁的剪力偏載系數(shù)研究[J];湖南交通科技;2015年04期

2 馬磊;萬水;蔣正文;李明鴻;;單箱多室波形鋼腹板箱梁荷載橫向分布[J];東南大學(xué)學(xué)報(自然科學(xué)版);2014年01期

3 任大龍;李文虎;萬水;;波形鋼腹板連續(xù)組合箱梁橋抗彎性能分析[J];常州工學(xué)院學(xué)報;2013年Z1期

4 崔冰;董萌;李準(zhǔn)華;;大跨度變截面波紋鋼腹板PC連續(xù)梁橋的設(shè)計[J];土木工程學(xué)報;2011年09期

5 萬水;李淑琴;馬磊;;波形鋼腹板預(yù)應(yīng)力混凝土組合箱梁結(jié)構(gòu)在中國橋梁工程中的應(yīng)用[J];建筑科學(xué)與工程學(xué)報;2009年02期

6 劉華;葉見曙;俞博;李海生;;橋梁荷載橫向分布系數(shù)計算方法[J];交通運(yùn)輸工程學(xué)報;2009年01期

7 曹海順,洪國治;寬箱梁荷載橫向分布的探討[J];結(jié)構(gòu)工程師;2005年02期

8 錢濟(jì)章,陳水生,許士強(qiáng);簡支梁橫向分布的計算方法[J];工程設(shè)計與建設(shè);2005年02期

9 徐岳,朱萬勇,楊岳;波形鋼腹板PC組合箱梁橋抗彎承載力計算[J];長安大學(xué)學(xué)報(自然科學(xué)版);2005年02期

10 劉玉擎;波折腹板組合箱梁橋結(jié)構(gòu)體系分析[J];橋梁建設(shè);2005年01期

，

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