CAJ | 학술논문

车辆荷载对于大跨公铁两用桥梁和大跨公路桥梁的使用性与安全性均有显著的影响。与中小跨桥梁相比，大跨桥梁交通容量可观，车辆在过桥中加减速和车道变化的概率较大，车辆荷载在桥梁的分布状态极为复杂。目前的交通荷载实测系统对车辆过桥全过程中的位置及速度变化不能提供详细的信息，为此，建立融合实测交通信息和元胞自动机（CA）模型的大跨桥梁车辆荷载模型，考虑不同区域车型构成特征，交通规则、车道设置和驾驶行为。依据河北一处重载路段的交通实测数据，分析不同交通服务水平下一座大跨斜拉桥静力荷载随时间和空间的分布特征，并通过与规范设计荷载值进行比较对荷载效应进行评价。
차량하재대우대과공철량용교량화대과공로교량적사용성여안전성균유현저적영향。여중소과교량상비，대과교량교통용량가관，차량재과교중가감속화차도변화적개솔교대，차량하재재교량적분포상태겁위복잡。목전적교통하재실측계통대차량과교전과정중적위치급속도변화불능제공상세적신식，위차，건립융합실측교통신식화원포자동궤（CA）모형적대과교량차량하재모형，고필불동구역차형구성특정，교통규칙、차도설치화가사행위。의거하북일처중재로단적교통실측수거，분석불동교통복무수평하일좌대과사랍교정력하재수시간화공간적분포특정，병통과여규범설계하재치진행비교대하재효응진행평개。
Vehicular load has significant impact on long-span railway-highway bridges and highway bridges. Compared with short and medium span bridges,the traffic volume is much denser and the occurrence probabili-ties of speed variation and lane changing on the long-span bridge are larger,which results in the distribution variation of vehicle loads on the bridge.The current traffic monitoring system cannot provide the detailed infor-mation of the whole process of vehicle movement on the bridge.In order to determine the vehicle distribution on the long-span bridge,the traffic model merging the real-monitored data and cellular automation (CA)model was developed.This model could consider the traffic properties in different regions,traffic rule,roadway situa-tion and driver’s behavior.Based on the traffic monitoring data in a heavy-traffic roadway in Hebei province, the vehicle load properties’variation in space and time domain on the middle span of a long -span cable -stayed bridge was analyzed.The load impact was evaluated through the comparison with the stipulated vehicle load.