摘要
为研究随机点蚀损伤对圆形钢管柱的力学性能影响,对带有随机点蚀损伤的构件进行了轴压试验,试验中考虑了不同的内径和点蚀损伤强度。结果显示,在文中所选点蚀损伤范围内,随着点蚀损伤强度的增加,点蚀损伤构件的屈服载荷和弹性模量均呈现线性下降趋势;内径越小,点蚀损伤对其屈服荷载和弹性模量影响越大;点蚀损伤强度为4%时,点蚀坑之间环向应变发展明显快于纵向应变发展。利用ANSYS有限元软件分别建立了无损伤构件和损伤构件的数值模型,利用试验结果对数值模型进行校核,最大误差分别为-4.17%、-11.78%,说明文中所建立的数值模型合理。最后,利用该数值模型分析了不同点蚀损伤区域对结构构件力学性能的影响,研究发现当点蚀损伤区位于2L/5~3L/5柱脚处时,构件屈服荷载降低了26.96%,此区域为构件的随机点蚀敏感区。
In order to study the influence of random pitting corrosion on the mechanical properties of circular steel tubular columns,an axial compression experiment was carried out on the components with random pitting damage,and different inner diameters and pitting damage strengths were considered.The results show that the yield load and elastic modulus of the damaged components decrease linearly with the increase of the pitting damage strength within the selected damage range.Meanwhile,the smaller the inner diameter,the greater the effect of pitting damage on the yield load and elastic modulus.The circumferential strain rate of the pitting corrosion was significantly faster than the longitudinal strain rate at 4%pitting damage strength.The numerical models of undamaged and damaged components were established by ANSYS finite element software,and were calibrated by the test results,and the maximum errors were-4.17%and-11.78%respectively,which indicated that the numerical models established in the paper were reasonable.Finally,the models were used to analyze the influences of different pitting damage areas on the mechanical properties of structural components.It was found that the component yield load decreased by 26.96%when the pitting damage area was located at 2L/5 to 3L/5 column footings,and this area can be defined as the sensitive area of random pitting damage.
作者
杨明飞
董悦奇
程华瑞
沙志平
陈宜网
YANG Mingfei;DONG Yueqi;CHENG Huarui;SHA Zhiping;CHEN Yiwang(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China;China Mcc20 Group Co.,Ltd.Engineering Design&Research Institute,Shanghai 201900,China;Anhui Shengwo Construction Group Co.,Ltd.,Hefei 230001,China)
出处
《安徽建筑大学学报》
2022年第4期20-26,共7页
Journal of Anhui Jianzhu University
基金
安徽省高校自然基金重点资助项目(KJ2016A209)。
关键词
随机点蚀
圆钢管柱
力学性能
点蚀损伤强度
敏感区
random pitting corrosion
circular steel tubular column
mechanical property
pitting corrosion damage
sensitive area
