本文選題：Monte-Carlo方法　切入點(diǎn)：汽車荷載　出處：《長(zhǎng)安大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：橋梁工程作為公路工程的樞紐,是交通運(yùn)輸?shù)难屎?而汽車荷載是橋梁使用階段承受的主要荷載,是影響公路橋梁結(jié)構(gòu)安全性和使用性的重要因素之一。本文以某高速公路WIM動(dòng)態(tài)稱重系統(tǒng)的交通調(diào)查數(shù)據(jù)為基礎(chǔ),分析研究了公路行駛車輛各參數(shù)的隨機(jī)特性;通過K-S優(yōu)度擬合檢驗(yàn)法,計(jì)算行駛車輛各參數(shù)的特性分布類型及分布參數(shù),采用Monte-Carlo方法進(jìn)行車流模擬;根據(jù)梁格模型計(jì)算得到的各車道影響線,考慮橫橋向多車道同時(shí)加載,按多種橫向加載子工況(例如,左偏、居中、右偏),計(jì)算20~40m跨徑裝配式T梁在模擬車流作用下研究橋梁的荷載效應(yīng)�；赪IM數(shù)據(jù)的基礎(chǔ)上編制了一套可統(tǒng)計(jì)、可查詢隨機(jī)車流參數(shù),根據(jù)統(tǒng)計(jì)參數(shù)生成隨機(jī)車流,模擬汽車荷載效應(yīng)程序。主要內(nèi)容包括以下幾個(gè)方面:1、闡述公路橋梁車輛荷載模型的研究現(xiàn)狀,給出車輛荷載調(diào)查的詳細(xì)流程;介紹了車輛荷載常用的幾種概率分布類型及K-S分布優(yōu)度擬合檢驗(yàn)法;全面分析隨機(jī)車流各參數(shù),包括車型、車速、橫向位置、車間距、車重及軸距參數(shù)等的分布類型及分布參數(shù)。2、利用某高速公路WIM數(shù)據(jù)分析其交通特性,并根據(jù)調(diào)查得到的車輛車型、橫向位置、車間距、車重及軸距參數(shù)等數(shù)據(jù),采用蒙特卡洛方法生成3個(gè)月的多車道隨機(jī)車流數(shù)據(jù);編制隨機(jī)車流模擬車輛荷載效應(yīng)仿真模擬軟件,根據(jù)影響線加載原理計(jì)算了不同跨徑簡(jiǎn)支梁、連續(xù)剛構(gòu)、斜拉橋在模擬車流作用下產(chǎn)生的荷載效應(yīng),并與公路—Ⅰ荷載效應(yīng)進(jìn)行對(duì)比,以研究模擬汽車荷載效應(yīng)和設(shè)計(jì)汽車荷載效應(yīng)的差異性;采用Rice公式對(duì)設(shè)計(jì)基準(zhǔn)期內(nèi)樣本橋梁的車輛荷載極值進(jìn)行外推,研究了汽車荷載效應(yīng)極值與設(shè)計(jì)汽車荷載效應(yīng)之間差異。3、根據(jù)模擬隨機(jī)車流提出一種計(jì)算橫、縱向折減系數(shù)的新方法。采用不同車道加載不同車流數(shù)據(jù)的方法,計(jì)算車道橫向折減系數(shù),給出三個(gè)車道時(shí)的車道折減系數(shù);計(jì)算隨機(jī)車流作用下以不同跨徑的車輛總重來計(jì)算數(shù)據(jù),定義為其縱向折減系數(shù),并給出了縱向折減系數(shù)公式。
[Abstract]:As the hub of highway engineering, bridge engineering is the throat of traffic and transportation, and the vehicle load is the main load during the use of the bridge. Based on the traffic survey data of WIM dynamic weighing system of a highway, the random characteristics of various parameters of highway vehicles are analyzed and studied. Through K-S goodness fitting test method, the characteristic distribution types and distribution parameters of each parameter of moving vehicle are calculated, the vehicle flow is simulated by Monte-Carlo method, and the influence line of each lane is calculated according to the beam model, and the multi-lane loading of the cross bridge is considered at the same time. According to various transverse loading sub-working conditions (for example, left deviation, center, right deviation, etc.), the load effect of the bridge is studied under the simulated traffic flow of 20m 40 m span assembled T-beam. A set of statistics is compiled on the basis of WIM data. The random vehicle flow parameters can be queried, the random vehicle flow can be generated according to the statistical parameters, and the vehicle load effect program can be simulated. The main contents include the following aspects: 1. The research status of the highway bridge vehicle load model is expounded. The detailed flow chart of vehicle load investigation is given, several kinds of probability distribution types and K-S distribution goodness fitting method are introduced, and the parameters of random vehicle flow, including vehicle type, speed, lateral position, distance between vehicles, are analyzed comprehensively. The distribution types and distribution parameters of vehicle weight and wheelbase parameters. 2. The traffic characteristics are analyzed by using the WIM data of a certain expressway, and based on the data of vehicle type, lateral position, vehicle spacing, vehicle weight and wheelbase parameters, etc. The Monte Carlo method is used to generate multi-lane random traffic flow data for three months, and a simulation software is developed to simulate the vehicle load effect. According to the loading principle of the influence line, the simple supported beams with different spans and continuous rigid frames are calculated. The load effect of cable-stayed bridge under simulated vehicle flow is compared with highway-鈪，

本文編號(hào)：1648989