2023.3,3（2）|专题:钢桥设计制造新技术正交异性钢桥面中热轧变厚U肋技术特点及制造工艺研究吴家君，洪泽，郭鸿亮（辽宁紫竹集团，辽宁鞍山114000）摘要：采用U肋纵向加劲的正交异性钢桥面系，在公路钢桥中得到了广泛应用，然而其多发疲劳裂缝问题，迫使工程界提出了诸多改进方法，采用热轧变厚度U肋替代常用的冷弯等厚度U肋便是其中的一项创新措施。论述了热轧变厚度U肋的技术特点，包括几何参数、热轧U肋力学性能、可焊性、疲劳性能及经济性等。在制造工艺方面，针对这种U肋厚度薄、精度要求高的特点，在普通热轧型材的成熟轧制工艺基础上，运用专业软件DEFORM仿真模拟超薄U肋成形、热处理至机加工全过程，再使用微型轧机试轧缩尺U肋，经试轧调整完成轧辊孔型设计。目前热轧变截面U肋已在十余座大型桥梁工程项目中得到应用，显示了一定的经济技术优势。关键词：钢桥；正交异性板；热轧U肋；制造工艺；钢桥疲劳Techniquefeaturesandmanufacturingprocessofhot-rolledvariedthicknessU-ribsfororthotropicbridgedeckWUJiajun,HONGZe,GUOHongliang（LiaoningZizhuGroup，Anshan114000，China）Abstract：TheorthotropicsteeldeckwithlongitudinalstiffeningofU-shapedribshasbeenwidelyusedinhighwaysteelbridges.However，inviewofitsfatiguecrackproblem，manyimprovementmethodshavebeenputforwardatpresent.Oneoftheinnovativemeasuresistoreplacethecommonlyusedcold-formedU-ribsbyhot-rolledU-ribswithvariedthickness.Inthispaper，thetechnicalfeaturesofhotrolledU-ribswithvariablethicknessareextensivelyexpounded，includinggeometricparameters，me-chanicalproperties，weldability，fatiguepropertiesandeconomyofhot-rolledU-ribs.InordertomeetthethinplateandhighprecisionrequirementsofthiskindofU-ribduringthemanufacturingprocess，basedonthematurerollingtechnologyofordinaryhot-rolledprofiles，theprofessionalsoftwareDEFORMisusedtosimulatethewholeprocessofthinU-ribforming，heattreatmentandmachining.Themicro-rollingmillisthenusedtotestrollthescaledU-rib，andtheprofiledrollisfinalizedthroughtrialrollingadjustment.Untilnow，thehot-rolledU-ribswithvariablethicknesshavebeenappliedinmorethantenlargebridgeprojects，highlightingcertaineconomicandtechnicaladvantages.中图分类号:U448.36；TG3...
