局部腐蚀对圆钢管混凝土柱轴向承载力的影响分析
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摘要
运用有限元软件ABAQUS对26根局部腐蚀圆钢管混凝土在轴压荷载作用下进行数值计算并与未腐蚀构件做对比,系统地分析和考察局部腐蚀的位置、局部腐蚀间的环向夹角与母线距离对钢管混凝土轴压力学性能的影响规律,确定三因素分别作用下的最不利情况。分析结果表明:对于单个蚀坑,蚀坑位于构件中间时构件的轴压承载力最低,越远离构件中部,承载力越大;对于两个蚀坑,构件的轴压承载力随蚀坑间环向夹角的增大而增大,随母线距离的增大呈先增大后减小的趋势。本研究成果对钢管混凝土在服役过程中的防护具有参考价值。
In this paper, the finite element software ABAQUS was used to simulate numerically the loading capacity of 26 locally corroded concrete filled circular steel tubular(CFST) under axial loads, which was compared with that of non-corroded specimens. The parameters including the location of localized corrosion, the circumferential angle and the axial distance between localized corrosion were analyzed to study the influence of local ized corrosion on the axial compressive performance of the columns and to find out the most disadvantageous conditions under the action of three factors. The result showed that for a single localized corrosion pit, axial compressive loading capacity was the lowest when the pit was located in the middle of the member. When the corrosion pit location was farther away from the middle part of the specimen, its bearing capacity was larger. For two corrosion pits, the axial compressive loading capacity of the partially corroded circular steel tubular columns increased with the increase of the circumferential distance between the two corrosion pits, but decreased first and then increased with increasing the axial distance between the two pits.
In this paper, the finite element software ABAQUS was used to simulate numerically the loading capacity of 26 locally corroded concrete filled circular steel tubular(CFST) under axial loads, which was compared with that of non-corroded specimens. The parameters including the location of localized corrosion, the circumferential angle and the axial distance between localized corrosion were analyzed to study the influence of local ized corrosion on the axial compressive performance of the columns and to find out the most disadvantageous conditions under the action of three factors. The result showed that for a single localized corrosion pit, axial compressive loading capacity was the lowest when the pit was located in the middle of the member. When the corrosion pit location was farther away from the middle part of the specimen, its bearing capacity was larger. For two corrosion pits, the axial compressive loading capacity of the partially corroded circular steel tubular columns increased with the increase of the circumferential distance between the two corrosion pits, but decreased first and then increased with increasing the axial distance between the two pits.
引文
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[12] ZHANG J,LIANG Z,HAN C J. Effects of ellipsoidal corrosion defects on failure pressure of corroded pipelines based on finite element analysis[J]. Electrochemical Science,2015,10:5036-5047.
[13] LIU X B, ZHANG H,LI M. Failure analysis of oil tubes containing corrosion defects based on finite element method[J]. Electrochemical Science,2016,11:5180-5196.
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[16]宋钢.考虑腐蚀效应的圆钢管轴向受力性能研究[D].哈尔滨:哈尔滨工业大学,2016.
[2]韩林海,杨有福.现代钢管混凝土结构技术[M].北京:中国建筑工业出版社,2004:77-178.
[3]华东交通大学. DB 36/J001-2007钢管混凝土结构设计规程[S].南昌:江西省建设厅,2008.
[4] HAN L H,HOU C,WANG Q L. Square concrete filled steel tubular(CFST)members under loading and chloride corrosion:experiments[J].Journal of Constructional Steel Research,2012,71(1):11-25.
[5] HOU C,HAN L H,ZHAO X L. Full-range analysis on square CFS stub columns and beams under loading and chloride corrosion[J].Thin-Walled Structures,2013,68(1):50-64.
[6]陈梦成,张凡孟,黄宏.酸雨环境下钢管混凝土柱轴压性能研究[J].华东交通大学学报,2015,32(3):50-55.
[7]王庆利,李清林,屈绍娥.长期荷载下圆钢管混凝土梁的耐腐蚀性能试验研究[J].建筑结构学报,2015(S2):50-55.
[8]花幼星,侯超,韩林海.氯离子腐蚀环境下钢管混凝土轴拉构件受力性能研究[J].工程力学,2015(S1):149-158.
[9]谢力,韩英俊,陈梦成.湿热环境下混凝土受酸雨腐蚀的试验研究[J].华东交通大学学报,2014,31(6):103-107.
[10] ORESTE S BURSI,ENRICO CAZZADOR,ALESSIA USSIA. Probabilistic analysis of a twin deck curved cable-stayed footbridge subjected to multiple inputs and corrosion[J]. Engineering Structures,2015,105:87-98.
[11]陈天平.局部腐蚀对钢管拱肋极限承载力的影响的试验研究与有限元分析[D].广东:广州大学,2016.
[12] ZHANG J,LIANG Z,HAN C J. Effects of ellipsoidal corrosion defects on failure pressure of corroded pipelines based on finite element analysis[J]. Electrochemical Science,2015,10:5036-5047.
[13] LIU X B, ZHANG H,LI M. Failure analysis of oil tubes containing corrosion defects based on finite element method[J]. Electrochemical Science,2016,11:5180-5196.
[14]陈严飞,李昕,周晶.不规则腐蚀缺陷管道极限承载力研究[J].工程力学,2009,26(11):190-196.
[15]刘京剑.酸雨环境下钢管再生混凝土轴压力学性能研究[D].南昌:华东交通大学,2015.
[16]宋钢.考虑腐蚀效应的圆钢管轴向受力性能研究[D].哈尔滨:哈尔滨工业大学,2016.
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