微合金化和余热处理热轧带肋钢筋高低周疲劳性能对比研究

钢铁钒钛, 2015, 36(2): 39-48. doi: 10.7513/j.issn.1004-7638.2015.02.008

微合金化和余热处理热轧带肋钢筋高低周疲劳性能对比研究

杨雄飞 ^0, , Surajit Kumar Paul ^1, , Pritam Kumar Rana ^2, , Debdulal Das ^3, , Sanjay Chandra ^4, , Saurabh Kundu ^5,

1.R & D, Tata Steel Limited, Jamshedpur 831007, India

2.Department of Metallurgy and Materials Engineering, Bengal Engineering and Science University, Shibpur 711103, India

3.Department of Metallurgy and Materials Engineering, Bengal Engineering and Science University, Shibpur 711103, India

4.R & D, Tata Steel Limited, Jamshedpur 831007, India

5.R & D, Tata Steel Limited, Jamshedpur 831007, India

关键词：余热处理钢筋 , 微合金化钢筋 , 高周疲劳 , 低周疲劳 , 抗震性能 , 应力集中 , 应力三轴度 , 横肋

High and Low Cycle Fatigue Performance Comparison between Micro-alloyed and TMT Rebar

Keywords： TMT rebar , micro-alloyed rebar , high cycle fatigue , low cycle fatigue , seismic resistance , stress concentration , stress triaxiality , transverse rib

通过试验研究,对比分析了微合金化和余热处理带肋钢筋的高周疲劳和低周疲劳性能.研究表明,微合金化钢筋比余热处理钢筋具有更好的疲劳性能.在微合金化和余热处理带肋钢筋的高低周疲劳试验中,观察到在横肋根部裂纹萌生并沿该区域扩展.有限元模拟结果显示在横肋根部出现应力集中,应力三轴度变大.模拟过程中也发现在横肋根部拉应变累积.有限元模拟结果有助于解释试验观察结果,即疲劳裂纹沿热轧带肋钢筋的横肋根部萌生及扩展.

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