本文選題：運(yùn)營車輛荷載 + GPD分布��； 參考：《廣州大學(xué)》2017年碩士論文

【摘要】：隨著我國工業(yè)化和城市化進(jìn)程的不斷地推進(jìn),公路運(yùn)營車輛荷載整體上發(fā)生了較大的變異,車輛超載問題日益嚴(yán)重,不少橋梁結(jié)構(gòu)實(shí)際壽命遠(yuǎn)低于設(shè)計(jì)壽命,導(dǎo)致既有橋梁的可靠度、運(yùn)營車輛荷載變異問題逐漸成為當(dāng)前研究的熱點(diǎn)。為此,本文基于京珠、渝湛和粵贛三條高速公路所獲得實(shí)測(cè)貨車荷載數(shù)據(jù),重現(xiàn)了三條高速公路的貨車車流,得出其荷載效應(yīng)極值,并基于GPD分布分析了既有橋梁的可靠度,提出了公路橋梁的檢測(cè)評(píng)估荷載取值改進(jìn)公式。本文研究工作主要包括以下四個(gè)方面:首先,利用動(dòng)態(tài)稱重系統(tǒng)WIM(Weight In Motion)獲取的三百多萬輛貨車荷載數(shù)據(jù)進(jìn)行統(tǒng)計(jì)分析。對(duì)統(tǒng)計(jì)車輛數(shù)據(jù)分別按總重、軸重、軸距分類統(tǒng)計(jì),并對(duì)三條高速公路的貨車荷載的情況進(jìn)行統(tǒng)計(jì)分析,描述了其荷載特征,反映了各條高速公路當(dāng)前運(yùn)營貨車荷載現(xiàn)狀。其次,基于三條高速的貨車荷載數(shù)據(jù),采用蒙特卡羅法模擬隨機(jī)貨車車流,加載于簡支梁上計(jì)算其荷載效應(yīng),采用閾值模型、極大似然估計(jì)理論、結(jié)合極值理論和超越概率理論,構(gòu)建了三條高速公路的貨車荷載效應(yīng)在不同剩余服役期下的最大值分布函數(shù)并外其荷載效應(yīng)極值,分析不同高速公路的荷載效應(yīng)差異狀況。再次,通過橋梁檢測(cè)手段獲得在役橋梁的承載能力,結(jié)合車輛荷載效應(yīng)極值分布從而得出在服役橋梁結(jié)構(gòu)的功能函數(shù),使用蒙特卡洛法進(jìn)行計(jì)算既有橋梁功能函數(shù)失效概率并考慮車輛荷載沖擊力的對(duì)既有橋梁可靠度的影響,得出橋梁結(jié)構(gòu)當(dāng)前的可靠度以及車輛荷載差異、發(fā)展變異對(duì)橋梁未來的可靠度影響。最后,根據(jù)上述計(jì)算結(jié)果,提出基于標(biāo)準(zhǔn)設(shè)計(jì)荷載的公路橋梁檢測(cè)評(píng)估荷載取值改進(jìn)公式,并通過可靠度驗(yàn)算證明了該檢測(cè)評(píng)估荷載的實(shí)用性和可行性。
[Abstract]:With the development of industrialization and urbanization in our country, the vehicle load of highway operation has changed greatly, the problem of vehicle overload is becoming more and more serious, and the actual life of many bridges is far lower than the design life. As a result of the reliability of existing bridges, the problem of load variation of operational vehicles has gradually become the focus of current research. Therefore, based on the measured load data obtained from Beijing-Zhujiang, Yuzhan and Guangdong-Jiangxi expressways, the freight car flow of the three expressways is reproduced, the extreme value of load effect is obtained, and the reliability of existing bridges is analyzed based on the GPD distribution. An improved formula for load selection of highway bridges is presented. The research work of this paper mainly includes the following four aspects: firstly, more than 3 million truck load data obtained from dynamic weighing system WIM(Weight in motion are statistically analyzed. The statistical data of vehicles are classified according to gross weight, axle load and wheelbase, and the load of freight cars on three highways is statistically analyzed, and the load characteristics are described, which reflect the current load situation of freight cars in operation on each highway. Secondly, based on the load data of three high-speed freight cars, the Monte Carlo method is used to simulate the random freight car flow, and the load effect is calculated by loading on simply supported beams. The threshold model is adopted and the maximum likelihood estimation theory is used. Combined with extreme value theory and transcendental probability theory, the maximum distribution function of freight car load effect under different remaining service periods was constructed and its load effect extreme value was analyzed. Thirdly, the bearing capacity of in-service bridges is obtained by means of bridge detection, and the function function of the bridge structure in service is obtained by combining with the extreme value distribution of vehicle load effect. Using Monte Carlo method to calculate the failure probability of existing bridge function and considering the influence of vehicle load impact force on existing bridge reliability, the current reliability of bridge structure and the difference of vehicle load are obtained. The influence of development variation on the future reliability of bridges. Finally, according to the above calculation results, an improved formula of load selection for highway bridges based on standard design load is proposed, and the practicability and feasibility of the test and evaluation load are proved by reliability checking calculation.
【學(xué)位授予單位】：廣州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U441.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 袁偉璋;黃海云;張俊平;尹興;劉澤戈;;基于WIM實(shí)測(cè)數(shù)據(jù)的車輛荷載效應(yīng)極值的預(yù)測(cè)分析[J];中國科技論文;2016年07期

2 李博;麻竹倩;;中美橋梁檢測(cè)體系對(duì)比研究[J];上海建設(shè)科技;2016年01期

3 王草;鄒阿鳴;張龍;李全旺;;考慮車載歷史信息的既有橋梁可靠度更新方法[J];公路交通科技;2016年02期

4 劉揚(yáng);張海萍;魯乃唯;江楠;;基于WIM的隨機(jī)車流建模和簡支梁橋荷載效應(yīng)研究[J];橋梁建設(shè);2015年05期

5 蔣田勇;羅舟滔;謝靜思;張家濱;;高速公路橋梁隨機(jī)車輛荷載譜[J];長沙理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2015年03期

6 阮欣;周軍勇;石雪飛;;橋梁汽車荷載響應(yīng)的極值外推方法綜述[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2015年09期

7 阮欣;周軍勇;石雪飛;;中法高速公路車流及荷載特性對(duì)比[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2013年09期

8 崔玉萍;;混凝土橋梁檢測(cè)與評(píng)估[J];公路;2013年01期

9 符蓉;葉昆;宗昕;張子翔;程志遠(yuǎn);;基于蒙特卡羅數(shù)值模擬的橋梁可靠度分析[J];土木工程與管理學(xué)報(bào);2012年04期

10 曹慧;梁鵬;吳向男;沈強(qiáng)儒;;基于裂縫指標(biāo)的RC梁橋承載力檢算評(píng)定[J];公路交通科技;2012年07期

相關(guān)博士學(xué)位論文 前2條

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

2 孫曉燕;服役期及加固后的鋼筋混凝土橋梁可靠性研究[D];大連理工大學(xué);2004年

相關(guān)碩士學(xué)位論文 前3條

1 史文軍;基于準(zhǔn)靜態(tài)影響線的橋梁承載能力評(píng)估方法研究[D];河北工業(yè)大學(xué);2012年

2 魏國祥;基于MATLAB的橋梁健康監(jiān)測(cè)數(shù)據(jù)處理與可靠度分析[D];蘭州交通大學(xué);2012年

3 王碩;橋梁運(yùn)營荷載狀況研究[D];同濟(jì)大學(xué);2007年

，

本文編號(hào)：1789163