第41卷第10期2023年10月文章编号：1009-7767（2023)10-0147-09Vol.41,No.10JournalofMunicipalTechnology0ct.2023D0I:10.19922/j.1009-7767.2023.10.147跨河慢行桥人致振动舒适度分析陶铁军，匡真光2*，吕化涛2(1.中国水利水电建设工程咨询西北有限公司，陕西西安710000;2.北京土人城市规划设计股份有限公司，北京100010)摘要：对于大跨径的轻柔桥梁结构，由于其自振频率较低，在行人激励荷载下更容易发生大幅振动，引起行人舒适度的问题。因此，以西安国际港务区跨灞河慢行桥工程为背景，结合国内外人行桥设计规范，利用有限元软件Midascivil建立该桥3D模型，对该桥中竖向振动频率在人行荷载频率敏感范围内的结构进行人致振动时程分析，并根据行人激励荷载作用下的竖向振动加速度时程曲线以及模态分析结果，设计相应的TMD减振系统，使结构振动加速度满足相关舒适度要求。研究结论对类似桥梁减振设计具有一定的参考价值。关键词：慢行桥；人致振动；行人舒适度；TMD；有限元中图分类号：U448.11ComfortAnalysisofHuman-inducedVibrationatBaheSlowBridge(1.ChinaWaterResourcesandHydropowerConstructionEngineeringConsultingNorthwestCompanyLimited,Xi'an710000,China;2.BeijingTurenUrbanPlanningandDesignCompanyLimited,Beijing100010,China)Abstract:Duetothelownaturalvibrationfrequency,thesoftbridgestructurewithlongspansismorelikelytohavelargevibrationunderpedestrianexcitationload,whichcausestheproblemofpedestriancomfort.Therefore,basedontheBaheSlowBridgeprojectinXi'anInternationalPortArea,combinedwithdomesticandforeignfootbridgedesignnorms,the3DmodelofthebridgeisestablishedbyfiniteelementsoftwareMidasciviltocarryoutthehu-man-inducedvibrationtimehistoryanalysisofthestructurewithverticalvibrationfrequencywithinthesensitiverangeofpedestrianloadfrequency.Accordingtotheverticalvibrationaccelerationtimehistorycurvesandmodalanalysisresultsofpedestrianexcitationload,thecorrespondingtunedmassdamper(TMD)vibrationdampingsystemisdesignedtomakethestructurevibrationaccelerationmeettherelevantcomfortrequirements.Theconclusionofthestudyhascertainreferencevalueforthedesignofsimilarbridges.Keywords:slowbridge;human-inducedvibration;pedestriancomfort;tunedmassdamper(TMD)...
