本文選題：Monte-Carlo方法　切入點：汽車荷載　出處：《長安大學》2015年碩士論文　論文類型：學位論文

【摘要】：橋梁工程作為公路工程的樞紐,是交通運輸的咽喉,而汽車荷載是橋梁使用階段承受的主要荷載,是影響公路橋梁結構安全性和使用性的重要因素之一。本文以某高速公路WIM動態(tài)稱重系統(tǒng)的交通調查數據為基礎,分析研究了公路行駛車輛各參數的隨機特性;通過K-S優(yōu)度擬合檢驗法,計算行駛車輛各參數的特性分布類型及分布參數,采用Monte-Carlo方法進行車流模擬;根據梁格模型計算得到的各車道影響線,考慮橫橋向多車道同時加載,按多種橫向加載子工況(例如,左偏、居中、右偏),計算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�；赪IM數據的基礎上編制了一套可統(tǒng)計、可查詢隨機車流參數,根據統(tǒng)計參數生成隨機車流,模擬汽車荷載效應程序。主要內容包括以下幾個方面:1、闡述公路橋梁車輛荷載模型的研究現狀,給出車輛荷載調查的詳細流程;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)度擬合檢驗法;全面分析隨機車流各參數,包括車型、車速、橫向位置、車間距、車重及軸距參數等的分布類型及分布參數。2、利用某高速公路WIM數據分析其交通特性,并根據調查得到的車輛車型、橫向位置、車間距、車重及軸距參數等數據,采用蒙特卡洛方法生成3個月的多車道隨機車流數據;編制隨機車流模擬車輛荷載效應仿真模擬軟件,根據影響線加載原理計算了不同跨徑簡支梁、連續(xù)剛構、斜拉橋在模擬車流作用下產生的荷載效應,并與公路—Ⅰ荷載效應進行對比,以研究模擬汽車荷載效應和設計汽車荷載效應的差異性;采用Rice公式對設計基準期內樣本橋梁的車輛荷載極值進行外推,研究了汽車荷載效應極值與設計汽車荷載效應之間差異。3、根據模擬隨機車流提出一種計算橫、縱向折減系數的新方法。采用不同車道加載不同車流數據的方法,計算車道橫向折減系數,給出三個車道時的車道折減系數;計算隨機車流作用下以不同跨徑的車輛總重來計算數據,定義為其縱向折減系數,并給出了縱向折減系數公式。
[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：1648989