山区低等级公路桥梁疲劳荷载谱研究  

Fatigue load spectrum of bridge of mountain low-grade highway

作　　者：苏万钦 李睿[1] 刘海证 李晓章 SU Wan-qin;LI Rui;LIU Hai-zheng;LI Xiao-zhang(Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650504,China;Yunnan Construction Engineering Design Institute,Kunming 650041,China)

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650500 [2]云南省建筑工程设计院,云南昆明650041

出　　处：《交通科学与工程》2020年第2期79-84,21,共7页Journal of Transport Science and Engineering

基　　金：国家自然科学基金-地区项目基金(51568029)。

摘　　要：针对山区低等级公路桥梁的疲劳损伤问题。利用动态称重系统,统计了云南省道S306峨德河桥连续29 d的车辆信息,通过聚类分析法对车辆的车型和车重的分布特性进行了分析,基于损伤积聚理论和等效损伤原理制定了山区低等级公路专用疲劳车辆荷载谱,并将其简化后得出标准疲劳车。研究结果表明:山区低等级公路上,33种车分成5类,以二轴车为主且车重服从对数正态分布,其它车型的车重服从三维高斯混合分布。标准疲劳车采用加载贡献最大的四轴车和六轴车车型,两者的加载贡献值为61.31%。In order to study the fatigue damage characteristic of low-grade highway bridges in mountainous areas,the vehicle information of Yunnan Provincial Highway S306 Edehe Bridge was counted for 29 days using the weight-in-motion system,the vehicle model and vehicle weight distribution characteristics were analyzed by cluster analysis.Based on the damage accumulation theory and the equivalent damage principle,the load spectrum of a fatigue vehicle of low-grade highways in mountainous areas was formulated,and that was simplified to obtain a standard fatigue vehicle.The results show that 33 types of vehicles can be divided into five categories,the two-axle vehicle is dominant,and the vehicle weights follow a lognormal distribution,and the vehicle weights of the other vehicles follow a three-dimensional Gaussian mixed distribution.The standard fatigue car adopts the four-axle and six-axle models with the largest load contribution,and the load contribution value of both is 61.31%.

关 键 词：动态称重系统 聚类分析法 疲劳荷载谱 

分 类 号：U441.4[建筑科学—桥梁与隧道工程]