發(fā)布時(shí)間：2018-06-17 12:13

  本文選題：滾石 + 橋墩��； 參考：《西南交通大學(xué)》2017年碩士論文

【摘要】：滾石是一種非常顯著的自然災(zāi)害,它時(shí)常發(fā)生于雨季山區(qū),危險(xiǎn)性極高,在西部山區(qū)尤其頻繁。伴隨著我國西部大開發(fā)以來,西部地區(qū)經(jīng)濟(jì)水平不斷發(fā)展,交通日益完善,高速公路、鐵路以及橋梁也逐漸覆蓋到更偏遠(yuǎn)的山區(qū),橋梁的架設(shè)更成為不可替代的交通基礎(chǔ)設(shè)施建設(shè)。然而山區(qū)滾石爆發(fā)突然,歷時(shí)極短,運(yùn)動(dòng)快速,對橋梁尤其橋墩的破壞性無比巨大,因此對滾石沖擊橋梁橋墩的動(dòng)力響應(yīng)作出分析是十分必不可少的。通過對橋墩受到滾石沖擊后的各種動(dòng)力性能的研究,從而探討山區(qū)橋梁橋墩的防護(hù)與加固措施,使得橋墩能夠更好的抵抗?jié)L石的沖擊,對橋梁的養(yǎng)護(hù)也具有一定的指導(dǎo)作用。結(jié)合國內(nèi)外目前對山區(qū)滾石沖擊橋墩的相關(guān)研究,本文著重分析橋墩受滾石沖擊的力學(xué)行為和影響因素。首先介紹了山區(qū)滾石沖擊橋墩的理論研究,再結(jié)合實(shí)際工程背景西部山區(qū)某簡支梁橋,通過顯式動(dòng)力學(xué)分析軟件ANSYS/LS-DYNA建立數(shù)值模型,比較分析不同初始動(dòng)能的滾石沖擊、橋墩的不同形式、墩柱混凝土不同的強(qiáng)度等級(jí)以及滾石多次沖擊下橋墩所產(chǎn)生的動(dòng)力響應(yīng),并研究了橋墩外敷泡沫鋁材料、外包鋼板和鋼板-泡沫鋁夾層結(jié)構(gòu)加固時(shí)力學(xué)性能的變化情況,從而對橋墩的加固和防護(hù)提出相關(guān)建議。
[Abstract]:Rolling stone is a very obvious natural disaster, it often occurs in rainy season mountain area, the danger is very high, especially in western mountain area. With the great development of the western region of China, the economic level of the western region has been developing continuously, the traffic is improving day by day, the highway, the railway and the bridge also gradually cover the more remote mountainous area, The erection of bridges has become an irreplaceable transportation infrastructure construction. However, the sudden eruption of rolling stones in mountain areas is very short in duration and fast in motion, and it is extremely destructive to bridges, especially to bridge piers. Therefore, it is necessary to analyze the dynamic response of rolling stones to bridge piers. Through the study of the dynamic performance of the pier after the impact of the rolling stone, the protection and reinforcement measures of the bridge pier in the mountain area are discussed, so that the pier can better resist the impact of the rolling stone, and it also has certain guiding role for the maintenance of the bridge. Combined with the current research on rolling stone impact pier at home and abroad, this paper mainly analyzes the mechanical behavior and influencing factors of the bridge pier subjected to rolling stone impact. This paper first introduces the theoretical study of rolling stone impact pier in mountainous area, and then, combining with the actual engineering background, a simple supported beam bridge in western mountainous area is built up a numerical model by explicit dynamic analysis software ANSYS- LS-DYNA to compare and analyze the rolling stone impact with different initial kinetic energy. Different forms of piers, different strength grades of concrete piers and dynamic responses of piers under rolling stone impact are studied. The change of mechanical properties of steel plate and steel sheet-foamed aluminum sandwich structure is discussed, and some suggestions on the reinforcement and protection of bridge pier are put forward.
【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)】：U445.7

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 郭紹平;王全才;吳清;張群利;;一種改進(jìn)的落石沖擊力計(jì)算方法[J];山地學(xué)報(bào);2014年03期

2 余志祥;楊暢;羅焱;;山區(qū)橋梁墩柱抗落石沖擊防護(hù)措施的耐撞性[J];四川建筑科學(xué)研究;2013年05期

3 劉衛(wèi)國;曾祥國;陳華燕;廖異;呂大立;;滾石作用下混凝土連續(xù)鋼構(gòu)橋動(dòng)力響應(yīng)分析[J];四川建筑;2011年06期

4 張錫祥;王智祥;巫祖烈;王家林;杜柏松;;一種新型FRP橋墩防撞浮箱結(jié)構(gòu)[J];重慶交通大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年03期

5 巫緒濤;李耀;李和平;;混凝土HJC本構(gòu)模型參數(shù)的研究[J];應(yīng)用力學(xué)學(xué)報(bào);2010年02期

6 劉廷權(quán);王興國;葛楠;;鋼筋混凝土柱在側(cè)向撞擊作用下破壞模式研究[J];武漢理工大學(xué)學(xué)報(bào);2010年09期

7 張瑞坤;王興國;葛楠;華玉;;側(cè)向撞擊作用下鋼筋混凝土柱動(dòng)力響應(yīng)的有限元分析[J];工程抗震與加固改造;2010年01期

8 沈均;何思明;吳永;;滾石災(zāi)害研究現(xiàn)狀及發(fā)展趨勢[J];災(zāi)害學(xué);2008年04期

9 林峰;匡昕昕;顧祥林;;沖擊荷載下混凝土本構(gòu)模型及損傷延遲指標(biāo)的參數(shù)研究[J];振動(dòng)與沖擊;2008年03期

10 陳煒;肖波;高宗余;;武漢天興洲公鐵兩用長江大橋1號(hào)墩防撞設(shè)計(jì)與分析[J];世界橋梁;2006年02期

，

本文編號(hào)：2031000