基于WIM的城市橋梁車輛荷載概率模型
發(fā)布時間:2018-08-29 17:41
【摘要】:近二十年來汽車工業(yè)和交通運輸?shù)难杆侔l(fā)展,道路交通流量不斷增長,重型車輛大量涌現(xiàn),使得車輛荷載較以往發(fā)生了很大的變化。但是有關城市橋梁車輛荷載方面的研究較為滯后。本文基于安裝在城市物流區(qū)快速路上的動態(tài)稱重系統(tǒng)(WIM)采集到的車流數(shù)據(jù),分析了車輛總重的數(shù)字特征,通過多重混合分布概率模型得到了車輛總重的三階混合對數(shù)正態(tài)分布函數(shù)。基于經典極值理論,采用改進的Gumbel法,確定了目標基準期內車輛荷載的極值分布,建立了車輛荷載模型,得到目標基準期內車輛荷載評估值。該方法簡單易行,穩(wěn)定性好,易于工程應用。
[Abstract]:With the rapid development of automobile industry and transportation in the past two decades, the increase of road traffic flow and the emergence of heavy vehicles make the vehicle load change greatly compared with the past. However, the research on vehicle load of urban bridges is lagging behind. Based on the traffic flow data collected by the dynamic weighing system (WIM) installed on the expressway in the urban logistics area, this paper analyzes the digital characteristics of the total vehicle weight. The third order mixed logarithmic normal distribution function of total vehicle weight is obtained by using the multiple mixed distribution probability model. Based on the classical extreme value theory and the improved Gumbel method, the extreme value distribution of vehicle load in the target reference period is determined, and the vehicle load model is established, and the vehicle load evaluation value in the target reference period is obtained. The method is simple, stable and easy to be applied in engineering.
【作者單位】: 浙江大學建筑工程學院;杭州河川建設工程有限公司;浙江工業(yè)大學建筑工程學院;
【基金】:上海市博士后科研資助計劃重點項目(13R21421100) 浙江省建設科技科研項目(2012049)
【分類號】:U441.2
[Abstract]:With the rapid development of automobile industry and transportation in the past two decades, the increase of road traffic flow and the emergence of heavy vehicles make the vehicle load change greatly compared with the past. However, the research on vehicle load of urban bridges is lagging behind. Based on the traffic flow data collected by the dynamic weighing system (WIM) installed on the expressway in the urban logistics area, this paper analyzes the digital characteristics of the total vehicle weight. The third order mixed logarithmic normal distribution function of total vehicle weight is obtained by using the multiple mixed distribution probability model. Based on the classical extreme value theory and the improved Gumbel method, the extreme value distribution of vehicle load in the target reference period is determined, and the vehicle load model is established, and the vehicle load evaluation value in the target reference period is obtained. The method is simple, stable and easy to be applied in engineering.
【作者單位】: 浙江大學建筑工程學院;杭州河川建設工程有限公司;浙江工業(yè)大學建筑工程學院;
【基金】:上海市博士后科研資助計劃重點項目(13R21421100) 浙江省建設科技科研項目(2012049)
【分類號】:U441.2
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