本文選題：橋頭跳車 + U型橋臺��； 參考：《貴州大學(xué)》2015年碩士論文

【摘要】：近年以來,公路交通在運營過程出現(xiàn)大量的橋頭跳車現(xiàn)象,這不僅對車輛運行造成很大障礙,而且對橋臺的損壞也很嚴(yán)重。目前的橋臺大多數(shù)為重力式U型橋臺,故研究此類型橋臺在跳車情況下產(chǎn)生的動力荷載和臺后填土壓力對橋臺的影響很有必要。本文敘述目前U型橋臺出現(xiàn)的一些常見病害現(xiàn)象以及U型橋臺的結(jié)構(gòu)類型和組成部分。通過概述當(dāng)前橋臺受力分析研究的成果,指出了未考慮橋頭跳車所產(chǎn)生的動力荷載對橋臺的影響。在深入分析橋頭跳車的本質(zhì)的基礎(chǔ)上,從跳車的危害、原因以及防治建議三個方面闡述跳車問題。其中著重論述了臺后填料與地基處理、過渡段設(shè)置和路橋整體設(shè)計三個方面提出跳車的防治建議。然后,講述臺背土壓力以及路面動力荷載的計算理論。通過當(dāng)前多種方法的對比分析可知,土壓力計算采用庫侖土壓力理論比較合適,跳車情況下的車輛動力荷載,運用考慮車輪軌跡模型的研究成果更加符合實際情況。同時,概述了巖土工程特點、有限元原理、MIDAS/GTS的應(yīng)用、工程概況和參數(shù)的選取,尤其對動力荷載的加載方式做了詳細(xì)的講解。采用MIDAS/GTS進(jìn)行U型橋臺建模及無路面荷載、無跳車、10mm跳車、20mm跳車、30mm跳車等多種工況下的有限元計算結(jié)果分析,通過對不同工況的橋臺結(jié)構(gòu)的第一主應(yīng)力和順橋向、橫橋向位移對比分析,得出了本課題的研究結(jié)果。并且將實測位移數(shù)據(jù)和模型計算結(jié)果比對分析,證實MIDAS/GTS建模及計算的合理。
[Abstract]:In recent years, there are a large number of bridge-head jumping phenomena in the operation of highway traffic, which not only cause great obstacles to vehicle operation, but also cause serious damage to abutment. Most of the abutments are gravity U-abutments at present, so it is necessary to study the influence of dynamic load on abutment caused by jumping abutment and the earth pressure behind abutment. This paper describes some common diseases of U-abutment and the structural types and components of U-abutment. By summarizing the current research results of abutment force analysis, it is pointed out that the influence of dynamic load on abutment caused by jump at bridge head is not considered. On the basis of deeply analyzing the essence of bridgehead jumping, the paper expounds the problem of jumping from three aspects: harm, reason and prevention and cure. The paper mainly discusses the prevention and treatment of the backfill and foundation, the setting of the transition section and the whole design of the road and bridge, and puts forward some suggestions for the prevention and cure of the jump. Then, the calculation theory of the earth pressure on the back of the abutment and the dynamic load on the pavement is discussed. Through the comparison and analysis of various methods, it can be seen that the Coulomb earth pressure theory is suitable for the calculation of earth pressure, and the vehicle dynamic load in the case of vehicle jumping is more suitable, and the application of the research results considering the wheel trajectory model is more in line with the actual situation. At the same time, the characteristics of geotechnical engineering, the application of finite element theory and Midas / GTS, the general situation of engineering and the selection of parameters are summarized, especially the loading mode of dynamic load is explained in detail. Using Midas / GTS to model U-type abutment and without road load, the finite element calculation results under various working conditions, such as 10mm or 10mm, 20mm, 30mm and so on, are analyzed. The first principal stress of abutment structure under different working conditions and the direction of the bridge are analyzed. Based on the comparative analysis of transverse bridge displacement, the research results of this subject are obtained. By comparing the measured displacement data with the calculated results, it is proved that the MIDAS-GTS model and calculation are reasonable.
【學(xué)位授予單位】：貴州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U416.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 裴軍;不良地質(zhì)條件下管道基礎(chǔ)處理與施工[J];科技情報開發(fā)與經(jīng)濟(jì);2003年02期

2 劉國孝;;橋頭跳車的成因分析與防治處理[J];林業(yè)科技情報;2010年02期

3 原晉喜;;重力式U型混凝土橋臺常見病害與處理對策淺析[J];山西交通科技;2012年06期

4 沈明;;公路擋墻建設(shè)工程中加筋擋墻有限元分析[J];中國市政工程;2011年03期

相關(guān)碩士學(xué)位論文 前1條

1 王佳佳;整體式橋臺橋梁臺后土壓力的研究[D];東北林業(yè)大學(xué);2012年

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本文編號：2014595