随机点锈蚀下圆形钢管轴压承载能力  

Axial Bearing Capacity of Circular Steel Pipes with Random Pitting Corrosion

作　　者：赵中伟 张宏伟 吴刚[1] ZHAO Zhongwei;ZHANG Hongwei;WU Gang(School of Civil Engineering,Southeast University,Nanjing 211189,China;School of Civil Engineering,Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]东南大学土木工程学院,江苏南京211189 [2]辽宁工程技术大学土木工程学院,辽宁阜新123000

出　　处：《同济大学学报（自然科学版）》2021年第2期188-194,共7页Journal of Tongji University:Natural Science

基　　金：国家重点研发计划(2020YFC1511900);江苏省博士后科研资助计划(2020Z356)。

摘　　要：针对随机点锈蚀对圆形钢管轴压承载能力的影响,以质量损失率为因变量,研究轴压承载力在随机点锈蚀影响下随质量损失率的变化规律。通过引入轴压承载力折减系数,揭示了锈蚀深度、锈蚀坑平面尺寸、钢材等级以及钢管壁厚对折减系数的影响规律。在大量随机有限元分析的基础上,提出了折减系数的理论计算公式。该公式可根据质量损失率精确预测钢管在随机点锈蚀影响下钢管轴压承载力的折减系数。In view of the effect of random pitting corrosion on axial bearing capacity of circular steel pipes,the changing rule of bearing capacity was revealed along with the mass loss ratio.A reduction factor was introduced to investigate the effect of corrosion thickness,pitting size,steel grade and wall thickness of steel pipes.The analytical formula for predicting the reduction factor was proposed.This formula can exactly predict the reduction factor of corroded steel pipes which is affected by random pitting corrosion.

关 键 词：圆形钢管 点锈蚀 锈蚀深度 锈蚀位置 钢材等级 随机性 

分 类 号：TU391[建筑科学—结构工程]