發(fā)布時間：2018-11-13 13:22

【摘要】：隨著我國工業(yè)化水平的不斷提升,我國基本步入工業(yè)化中、后期階段。工業(yè)發(fā)展帶來的車輛超重問題、道路橋梁的疲勞問題逐漸成為當前車輛荷載研究的重點。據(jù)此,本文基于京珠、渝湛和粵贛三條高速公路所獲得實測車輛荷載數(shù)據(jù),得到超重車輛的尾部模型和標準疲勞車輛荷載模型。這對我國超重車輛的管理及現(xiàn)行規(guī)范關(guān)于疲勞荷載模型的完善提供較大的參考價值。具體研究內(nèi)容如下:首先,利用動態(tài)稱重系統(tǒng)WIM(Weight In Motion)獲取的350萬輛車輛荷載數(shù)據(jù)進行統(tǒng)計分析。對統(tǒng)計車輛數(shù)據(jù)分別按總重、軸重、軸距分類統(tǒng)計,并對三條高速公路的超重車輛的情況進行統(tǒng)計分析,描述了其車輛荷載特征,反映了各條高速公路當前運營車輛荷載現(xiàn)狀。其次,基于三條高速的超重荷載數(shù)據(jù),采用極值理論、閾值模型和極大似然估計等理論,構(gòu)建了三種代表車輛的車重極值尾部分布函數(shù),進而整合得到了任意超重車輛的尾部分布函數(shù)。由此推算出未來任意重現(xiàn)期內(nèi)可能出現(xiàn)的車輛荷載的極值,建立了工業(yè)化中后期地區(qū)運營車輛荷載變異的數(shù)學(xué)描述。最后,依據(jù)運營車輛構(gòu)成及等效損傷原理,抽象出四軸、六軸兩種標準疲勞車模型;與規(guī)范建議的兩種疲勞模型對比后發(fā)現(xiàn),該模型對反映中小跨徑橋梁的疲勞損傷時有更好的適用性;將考慮了車輛荷載增長變化的疲勞荷載作為本文的最終確定的標準疲勞荷載模型。
[Abstract]:Along with our country industrialization level unceasing enhancement, our country enters the industrialization basically, the later stage. The problem of vehicle overweight caused by industrial development and the fatigue of road and bridge gradually become the focus of vehicle load research. Based on the measured vehicle load data obtained from Beijing-Zhujiang, Yuzhan and Guangdong-Jiangxi freeways, the tail model and standard fatigue vehicle load model of overweight vehicles are obtained in this paper. This provides a great reference value for the management of overweight vehicles in China and the improvement of fatigue load models in current codes. The main contents are as follows: firstly, the load data of 3.5 million vehicles obtained by dynamic weighing system (WIM (Weight In Motion) are analyzed statistically. The statistical data of vehicles are classified according to gross weight and wheelbase, and the situation of overweight vehicles in three highways is analyzed, and the characteristics of vehicle load are described, which reflects the current situation of vehicle load on each expressway. Secondly, based on three high speed overweight load data, using extreme value theory, threshold model and maximum likelihood estimation theory, three kinds of vehicle weight extreme tail distribution functions are constructed. Furthermore, the tail distribution function of any overweight vehicle is obtained by integration. The extreme value of the vehicle load which may appear in any recurrence period in the future is calculated, and the mathematical description of the variation of the operating vehicle load in the middle and late period of industrialization is established. Finally, according to the operating vehicle composition and equivalent damage principle, the four-axle and six-axle standard fatigue vehicle models are abstracted. Comparing with the two fatigue models suggested by the code, it is found that the model is more suitable for reflecting the fatigue damage of medium and small span bridges. The fatigue load, which takes into account the variation of vehicle load growth, is considered as the final standard fatigue load model in this paper.
【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】：U441.4

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