吊杆钢丝损伤检测及剩余疲劳寿命试验研究

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中图分类号：U443 文献标志码：A 文章编号：2095-2945（2025）20-0089-05

Abstract：Thispapertakestheold boomunderthereplacementof Heishipu XiangjiangBridgeastheresearchobject，and analyzestheremainingfatiguelifeoftheboombyonthesteewiredamageinspection，statictensiletestandfatiguetestresults. Theresultsshowthattheresiduallifeofgrade3andgrade4corrodedsteelwireisreduedmore，andtheresidualfatiguelife of steel wire with rust grade 4 has been reduced by 20% .Parisformula is used to quantitatively introduce the theoretical residualfatiguelifeoffracturesteelwire.Thetheoreticalfatiguelifevalueagreeswellwiththetestfatiguelifevalue.Inthe actual testitems，theresidual fatigue lifeofcorosionstelwirecanbeevaluatedbymeasuringthecorosionpitparameters.

Keywords：bridge engineering；suspender; corrosion clasification； fatigue life；remaining life

吊杆作为拱桥连接拱肋与桥面系的主要受理构件，吊杆的使用状态直接影响到桥梁的运行安全和使用寿命。（剩余5227字）