腐蚀环境下H型钢柱局部点蚀对抗震性能影响分析

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中图分类号：TU391.3 文献标志码：A 文章编号：1005-8249（2025）02-0097-06

DOI：10.19860/j.cnki.issn1005- 8249.2025.02.017

Abstract：Toinvestigate theimpactof localized pittngcorosiononseismicperformanceof steel structures incorrosive environments，fiveH-shaped Q235steelcolumns wereselectedandsubjected to varyingdegresof pitingcorrosionatsame locations.Basedonlowcyclerepeated loading tests，theinfluenceoflocaliedpitingcorrosionatdiferent locationsothe seismic performanceofstelstructures wasevaluated，andtheimpactof piting damageon theloadandenergydissipation capacityof steelcolumnswasanalyzedthroughnumericalsimulation.Theresultsshowthatlocalizedpiting corrosin significantlyreduces thepeak load，stifness，and bearing capacityof steelcolumns.Theseismicperformance degradation caused bypiting inpure bending regions isfar more severethanthatinbending－shearregions.Additionally，piting onthe righthalfofthecross－section leads toagreaterreductioninseismicperformancecompared topitingonthelower half.To addresslocalizedpiting，repair methodssuch assurface treatmentandreinforcement strengtheningareproposed，offering practical references for the maintenance and rehabilitation of steel structures in corrosive environments.

Key words：H-shaped steel column； local pitting corrosion； seismic performance

0 引言

随着国家工业化的迅猛发展，钢结构凭借轻质高强、抗震性能好、施工速度快、可回收利用等优势，已广泛应用于建筑领域[1。（剩余6298字）