电化学修复后钢筋疲劳性能试验研究
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龙江兴,金伟良,张军,毛江鸿,崔磊
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Experimental study on fatigue properties of steel bars after electrochemical repair
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Jiang-xing LONG,Wei-liang JIN,Jun ZHANG,Jiang-hong MAO,Lei CUI
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表 1 钢筋疲劳试验结果 |
Tab.1 Fatigue test results of rebars |
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试件编号 | I/(A·m−2) | t/周 | ${\sigma _{\max }}$ | $\Delta{\sigma}$/MPa | Nf/次 | Dfrac1)/mm | 注:1)断裂部位指钢筋断口距下夹头表面的距离,部分试件断于夹头处数据视为试验失败,未列出. | C-0.5 | − | − | 0.5 ${\sigma _{\rm{u}}}$ | 220.28 | 920 846 | 295 | E-1-0.5 | 1 | 2 | 0.5 ${\sigma _{\rm{u}}}$ | 220.28 | 908 345 | 42 | E-3-0.5 | 3 | 2 | 0.5 ${\sigma _{\rm{u}}}$ | 220.28 | 846 547 | 156 | E-5-0.5 | 5 | 2 | 0.5 ${\sigma _{\rm{u}}}$ | 220.28 | 786 583 | 35 | C-0.6 | − | − | 0.6 ${\sigma _{\rm{u}}}$ | 275.31 | 410 096 | 266 | E-1-0.6 | 1 | 2 | 0.6 ${\sigma _{\rm{u}}}$ | 275.31 | 381 668 | 38 | E-3-0.6 | 3 | 2 | 0.6 ${\sigma _{\rm{u}}}$ | 275.31 | 352 908 | 295 | E-5-0.6 | 5 | 2 | 0.6 ${\sigma _{\rm{u}}}$ | 275.31 | 321 572 | 253 | B-1-0.6 | 1 | 2 | 0.6 ${\sigma _{\rm{u}}}$ | 275.31 | 389 097 | 274 | B-3-0.6 | 3 | 2 | 0.6 ${\sigma _{\rm{u}}}$ | 275.31 | 409 368 | 244 | B-5-0.6 | 5 | 2 | 0.6 ${\sigma _{\rm{u}}}$ | 275.31 | 393 830 | 291 | C-0.65 | − | − | 0.65 ${\sigma _{\rm{u}}}$ | 302.85 | 326 505 | 228 | E-1-0.65 | 1 | 2 | 0.65 ${\sigma _{\rm{u}}}$ | 302.85 | 311 655 | 216 | E-3-0.65 | 3 | 2 | 0.65 ${\sigma _{\rm{u}}}$ | 302.85 | 302 422 | 84 | E-5-0.65 | 5 | 2 | 0.65 ${\sigma _{\rm{u}}}$ | 302.85 | 284 783 | 148 | B-1-0.65 | 1 | 2 | 0.65 ${\sigma _{\rm{u}}}$ | 302.85 | 318 634 | 53 | B-3-0.65 | 3 | 2 | 0.65 ${\sigma _{\rm{u}}}$ | 302.85 | 317 548 | 132 | B-5-0.65 | 5 | 2 | 0.65 ${\sigma _{\rm{u}}}$ | 302.85 | 321 493 | 258 | C-0.7 | − | − | 0.7 ${\sigma _{\rm{u}}}$ | 330.39 | 233 588 | 280 | E-1-0.7 | 1 | 2 | 0.7 ${\sigma _{\rm{u}}}$ | 330.39 | 222 274 | 夹头 | E-3-0.7 | 3 | 2 | 0.7 ${\sigma _{\rm{u}}}$ | 330.39 | 191 616 | 夹头 | E-5-0.7 | 5 | 2 | 0.7 ${\sigma _{\rm{u}}}$ | 330.39 | 186 272 | 290 |
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