文章编号:1673-0291(2023)03-0019-07DOI:10.11860/j.issn.1673-0291.20210114第47卷第3期2023年6月Vol.47No.3Jun.2023北京交通大学学报JOURNALOFBEIJINGJIAOTONGUNIVERSITY考虑随机风载及交通荷载共同作用下斜拉索疲劳损伤分析郭薇薇,张雅婧,娄亚烽(北京交通大学土木建筑工程学院,北京100044)摘要:针对斜拉索在风和交通荷载作用下易发生振动及疲劳的问题,通过改变风参数和车辆参数,对不同组合工况下拉索应力及疲劳损伤进行分析.基于当地的气象资料和交通量统计资料,对风速、风攻角、汽车车型、车重、车流量、车间距等随机参数进行模拟,依次建立桥址处的随机风荷载模型、桥面随机汽车车流模型及移动列车荷载模型,运用Ansys软件编程实现损伤分析,最后对某大跨度公铁两用斜拉桥进行实例验证.研究结果表明:风载作用下最不利的拉索位置随着风攻角变化而变化,在风攻角不超过−6°~+6°时,短索较为不利,而超出该范围时中长索较为不利;交通车辆荷载对拉索的疲劳损伤影响较为显著,同时考虑随机风载、密集车流和移动列车工况时,拉索的等效应力幅值较仅考虑风荷载作用时增大约311.7%.关键词:斜拉索;疲劳损伤;随机风荷载;随机车流;移动列车中图分类号:U441.3文献标志码:AFatiguedamageanalysisofcableunderrandomwindloadsandtrafficloadsGUOWeiwei,ZHANGYajing,LOUYafeng(SchoolofCivilEngineering,BeijingJiaotongUniversity,Beijing100044,China)Abstract:Toaddressthesusceptibilityofstayedcablestovibrationsandfatiguecausedbywindandtraf⁃ficloads,thisstudyanalyzesthestressandfatiguedamageofcableunderdifferentcombinedworkingconditionsbyvaryingwindandvehicleparameters.Onthebasisoflocalmeteorologicaldataandtrafficstatistics,therandomparameterssuchasweedspeed,windattackangle,automobiletype,weight,flowandspacingaresimulatedforthecalculation.Thestudyestablishesarandomwindloadmodelatthebridgesite,arandomroadtrafficflowmodelonthebridgedeck,andamovingtrainmodeltocalcu⁃latefatiguedamage,usingAnsyssoftwareprogrammingtoconductdamageanalysis.Finally,verifica⁃tionisconductedusingalong-spanrail-cum-roadcable-stayedbridge.Theresearchresultsshowthatthepositionofthemostvulnerablecableunderwindloadschangeswiththewindattackangle.Withintheattackanglerangeof−6°to6°...