腐蚀环境下H型钢柱局部点蚀对抗震性能影响分析  

Analysis of the Impact of Local Pitting Corrosion on Seismic Performance of H-shaped Steel Columns in Corrosive Environments

作　　者：张一鑫 ZHANG Yixin(Xi’an Traffic Engineering Institute,Xi’an 710300,China)

机构地区：[1]西安交通工程学院,西安710300

出　　处：《粉煤灰综合利用》2025年第2期97-101,123,共6页Fly Ash Comprehensive Utilization

基　　金：陕西省教育厅科学研究计划项目(23JK0532)。

摘　　要：为研究腐蚀环境下钢结构局部点蚀对抗震性能的影响,选择了5根H型Q235钢柱并对其不同位置进行了相同程度的点蚀,采用低周反复加载试验,评估不同位置局部点蚀对钢结构抗震性能的影响,并通过数值模拟,分析了点蚀损伤对钢柱的荷载和耗能能力的影响规律。结果表明:局部点蚀会显著降低钢柱的峰值荷载、刚度以及承载力;纯弯段点蚀对钢柱抗震性能的削弱程度远高于弯剪段点蚀,且右半截面点蚀后钢柱的抗震性能降低程度同样高于下半截面点蚀;针对局部点蚀钢柱提出修复方法,包括表面处理、补强加固等,为腐蚀环境下钢结构建筑的抗震性能研究提供了借鉴。To investigate the impact of localized pitting corrosion on seismic performance of steel structures in corrosive environments,five H-shaped Q235 steel columns were selected and subjected to varying degrees of pitting corrosion at same locations.Based on low cycle repeated loading tests,the influence of localized pitting corrosion at different locations on the seismic performance of steel structures was evaluated,and the impact of pitting damage on the load and energy dissipation capacity of steel columns was analyzed through numerical simulation.The results show that localized pitting corrosion significantly reduces the peak load,stiffness,and bearing capacity of steel columns.The seismic performance degradation caused by pitting in pure bending regions is far more severe than that in bending-shear regions.Additionally,pitting on the right half of the cross-section leads to a greater reduction in seismic performance compared to pitting on the lower half.To address localized pitting,repair methods such as surface treatment and reinforcement strengthening are proposed,offering practical references for the maintenance and rehabilitation of steel structures in corrosive environments.

关 键 词：H型钢柱 局部点蚀 抗震性能 

分 类 号：TU391.3[建筑科学—结构工程]