结构工程师2025，Vol.41Issue(6)：31-40,10.DOI:10.15935/j.cnki.jggcs.202506.0004
腐蚀高强耐候钢梁大变形承载性能研究
Study on Large Deformation Bearing Capacity of Corroded High-Strength Weathering Steel Beams
摘要
Abstract
Corrosion of steel structures exhibits high uncertainty,while the Monte Carlo method has been widely used to address stochastic problems.Therefore,the combination of Monte Carlo and finite element methods has become an effective approach for studying steel structure corrosion.This paper presents a numerical investigation on the yield and ultimate bearing capacities of corroded high-strength weathering steel H-beams in the large deformation stage.The influence of random corrosion was considered by introducing random cuboid pits on intact steel beams.The parameters considered include volume loss rate,pit depth,and beam span-to-depth ratio.These parameters were orthogonally combined to generate 540 random pitting models,and bending capacity analyses were conducted to determine their yield and ultimate bearing capacities.The results indicate that under the same corrosion level,different pit depths and span-to-depth ratios lead to variations in the bearing capacity reduction factors of the steel beams.The reductions in both yield and ultimate bearing capacities exhibit an approximately linear negative correlation with the corrosion rate.Furthermore,a comparison between the bending capacities of beams with random corrosion and those with uniform corrosion revealed that the uniform corrosion model significantly overestimates the bending capacity of corroded steel beams,with the overestimation becoming more pronounced as the corrosion rate increases.关键词
高强耐候钢梁/蒙特卡洛方法/随机点蚀/受弯承载力/折减系数Key words
high-strength weathering steel beam/Monte Carlo method/random pitting/flexural bearing capacity/reduction factor分类
建筑与水利引用本文复制引用
郭俊辉,陈安康,曹明,李皓,蔡立葵,张惊宙,罗金辉..腐蚀高强耐候钢梁大变形承载性能研究[J].结构工程师,2025,41(6):31-40,10.基金项目
国家电网有限公司科技项目(合同号:SGTYHT/21-JS-223) （合同号:SGTYHT/21-JS-223）
