游泳馆环境下拉索的抗锈性能及评估方法
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摘要
为建立空间结构拉索定量锈损评估方法,本文结合人造气氛腐蚀实验、理论分析和当量折算原理进行研究.首先,观察锈蚀现象并分析锈蚀规律,建立具有普适性的3参数锈蚀发展模型;其次,建立游泳馆真实环境谱与实验室加速锈蚀环境谱的当量转化模型;最后,提出了1种游泳馆环境下拉索的锈损评估方法,并通过游泳馆环境自然暴露实验验证了模型和评估方法的正确性.研究结果表明:随锈蚀时间延长,钢丝点蚀损伤逐渐突出,其锈蚀量百分比与锈蚀时间之间满足带修正值的幂函数关系;3参数锈蚀发展模型可较好模拟拉索的锈蚀;合理建立实际结构服役环境谱和实验室加速环境谱,正确推导当量折算系数,可实现各类环境中的空间结构服役拉索的锈损评估.
To establish a quantitative method for evaluating corrosion in the spatial structure of cables,in this study,we investigated corrosion in an artificial atmosphere,conducted a theoretical analysis,and considered an equivalent conversion principle.First,we examined the corrosion phenomenon and analyzed the law of corrosion,and then we established a general three-parameter corrosion development model.Next,we developed an equivalent conversion model between the environmental spectra characterizing a real natatorium and accelerated corrosion in a laboratory.Lastly,we developed a method for evaluating the corrosion damage of a cable in a natatorium environment,and we verified its accuracy in a natatorium environment exposure test.The results show that pitting damage of the steel wire becomes increasingly serious with time,and the proposed model's modified power function value is satisfied with respect to the percentage of corrosion and the corrosion time.In addition,the three-parameter corrosion development model simulates the corrosion of the cable very well,and the assessment of the corrosion of the spatial structure of cables in service can be realized by reasonably establishing the actual service environment spectrum and the laboratory accelerated environment spectrum and then correctly deducing the equivalent conversion coefficient.
To establish a quantitative method for evaluating corrosion in the spatial structure of cables,in this study,we investigated corrosion in an artificial atmosphere,conducted a theoretical analysis,and considered an equivalent conversion principle.First,we examined the corrosion phenomenon and analyzed the law of corrosion,and then we established a general three-parameter corrosion development model.Next,we developed an equivalent conversion model between the environmental spectra characterizing a real natatorium and accelerated corrosion in a laboratory.Lastly,we developed a method for evaluating the corrosion damage of a cable in a natatorium environment,and we verified its accuracy in a natatorium environment exposure test.The results show that pitting damage of the steel wire becomes increasingly serious with time,and the proposed model's modified power function value is satisfied with respect to the percentage of corrosion and the corrosion time.In addition,the three-parameter corrosion development model simulates the corrosion of the cable very well,and the assessment of the corrosion of the spatial structure of cables in service can be realized by reasonably establishing the actual service environment spectrum and the laboratory accelerated environment spectrum and then correctly deducing the equivalent conversion coefficient.
引文
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[16]葛娈.某焊接空心球网架车间坍塌事故分析[D].太原:太原理工大学土木工程学院,2014.Ge Luan.Analysis on Collapse Accident of a Welded Hollow Ball Net Frame Workshop[D].Taiyuan:College of Civil Engineering,Taiyuan University of Technology,2014(in Chinese).
[17]武岳,王凤来,陈波,等.某游泳馆屋盖网架结构检测及安全性评估[J].建筑结构,2008,38(12):110-112.Wu Yue,Wang Fenglai,Chen Bo,et al.Structural safety assessment of a grid structure as the roof of a swimming pool[J].Building Structure,2008,38(12):110-112(in Chinese).
[18]孔祥.某游泳馆焊接空心球网架腐蚀评价及原因探讨[J].山西建筑,2009,35(13):150-151.Kong Xiang.The evaluations and reasons of the corrosion of space truss for welding hollow ball in a swimming pool[J].Shanxi Architecture,2009,35(13):150-151(in Chinese).
[19]施伟,吕鑫,徐大州,等.游泳馆环境下重防腐体系的质量控制方法分析[J].建筑技术开发,2017,44(22):129-131.Shi Wei,LüXin,Xu Dazhou,et al.Analysis on quality control of heavy-duty anticorrosion system for swimming hall[J].Building Technology Development,2017,44(22):129-131(in Chinese).
[20]黎学明,周杰敏,刘强,等.张力对斜拉桥拉索镀锌钢绞线腐蚀行为影响[J].电化学,2007,13(3):297-301.Li Xueming,Zhou Jiemin,Liu Qiang,et al.Effect of tension on the corrosion behavior of galvanized steel wire for cable-stayed bridge[J].Electrochemistry,2007,13(3):297-301(in Chinese).
[21]缪长青,孙传智,陈亮.大跨桥梁缆索构件环境腐蚀当量关系研究[J].水利与建筑工程学报,2010,8(6):5-7.Miao Changqing,Sun Chuanzhi,Chen Liang.Research on equivalent conversion method of environmental corrosion for cable components of large span bridges[J].Journal of Water Conservancy and Construction Engineering,2010,8(6):5-7(in Chinese).
[22]刘成臣,鲁国富,张金奎,等.2A12与30CrMnSiA在相同海洋大气环境中的加速环境谱差异[J].腐蚀与防护,2015,36(7):609-613.Liu Chengchen,Lu Guofu,Zhang Jinkui,et al.Differences between environment spectrum of 2A12 and30Cr Mn Si A in the same ocean atmospheric environment[J].Corrosion&Protection,2015,36(7):609-613(in Chinese).
[2]余玉洁,陈志华,王霄翔.拉索半精细化有限元模型及其敏感性分析[J].天津大学学报:自然科学与工程技术版,2015,48(增):96-101.Yu Yujie,Chen Zhihua,Wang Xiaoxiang.Refined simplified finite element model of cable and its sensitivity analysis[J].Journal of Tianjin University:Science and Technology,2015,48(Suppl):96-101(in Chinese).
[3]Jiang Chao,Wu Chong,Jiang Xu.Experimental study on fatigue performance of corroded high-strength steel wires used in bridges[J].Construction and Building Materials,2018,187:681-690.
[4]Nakamura S I,Suzumura K,Tarui T.Mechanical properties and remaining strength of corroded bridge wires[J].Structural Engineering International,2004,14(1):50-54.
[5]Nakamura S I,Suzumura K.Hydrogen embrittlement and corrosion fatigue of corroded bridge wires[J].Journal of Constructional Steel Research,2009,65(2):269-277.
[6]张婷婷.拱桥吊杆承载能力计算方法及锈蚀钢丝力学特性研究[D].杭州:浙江大学建筑工程学院,2016.Zhang Tingting.Research on Residual Bearing Capacity of Hangers and Mechanical Properties of Corroded Wires[D].Hangzhou:School of Architectural Engineering,Zhejiang University,2016(in Chinese).
[7]钟力.斜拉索腐蚀损伤与安全性能评定方法研究[D].重庆:重庆交通大学土木工程学院,2014.Zhong Li.Damage and Safety Performance Evaluation of the Cable-Stayed Corrosion[D].Chongqing:School of Civil Engineering,Chongqing Jiaotong University,2014(in Chinese).
[8]潘骁宇.中下承拱桥的吊桥锈蚀损伤研究[D].杭州:浙江大学建筑工程学院,2015.Pan Xiaoyu.Study on the Corrosion Damage of Suspension Bridges in the Middle and Lower Arch Bridges[D].Hangzhou:School of Architectural Engineering,Zhejiang University,2015(in Chinese).
[9]徐俊.拉索损伤演化机理与剩余使用寿命评估[D].上海:同济大学土木工程学院,2006.Xu Jun.Damage Evolution Mechanism and Residual Life Evaluation of Stayed Cables[D].Shanghai:School of Civil Engineering,Tongji University,2006(in Chinese).
[10]Hopwood T,Havens J H.Inspection,Prevention,and Remedy of Suspension Bridge Cable Corrosion Problems[R].Kentucky Transportation Research Program Report,1984.
[11]Mayrbaurl Ronald M.Corrosion in Suspension Bridge Cables[C]//Lucerne,Switzland:16 th Conference of LABSE,2000.
[12]Sante Camo.Probabilistic strength estimates and reliability of damaged parallel wire cables[J].Journal of Bridge Engineering,2003,8(5):297-311.
[13]中国国家标准化管理委员会.GB/T 10125-2012人造气氛腐蚀试验盐雾试验[S].北京:中国标准出版社,2013.Standardization Administration of the People's Republic of China.GB/T 10125-2012 Corrosion Tests in Artificial Atmosphere-Salt Spray Tests[S].Beijing:Standards Press of China,2013.
[14]张岩,黄一.点蚀损伤船体板格单轴压缩极限强度[J].天津大学学报:自然科学与工程技术版,2016,49(4):429-436.Zhang Yan,Huang Yi.Ultimate strength of ship structural plate with pitting corrosion damnification under uniaxial compression[J].Journal of Tianjin University:Science and Technology,2016,49(4):429-436(in Chinese).
[15]杨姝姮.拉索腐蚀及在役结构检测评估方法研究[D].天津:天津大学建筑工程学院,2016.Yang Shuheng.Study on the Corrosion of Cable and the Evaluation Method of Service Structure[D].Tianjin:School of Civil Engineering,Tianjin University,2016(in Chinese).
[16]葛娈.某焊接空心球网架车间坍塌事故分析[D].太原:太原理工大学土木工程学院,2014.Ge Luan.Analysis on Collapse Accident of a Welded Hollow Ball Net Frame Workshop[D].Taiyuan:College of Civil Engineering,Taiyuan University of Technology,2014(in Chinese).
[17]武岳,王凤来,陈波,等.某游泳馆屋盖网架结构检测及安全性评估[J].建筑结构,2008,38(12):110-112.Wu Yue,Wang Fenglai,Chen Bo,et al.Structural safety assessment of a grid structure as the roof of a swimming pool[J].Building Structure,2008,38(12):110-112(in Chinese).
[18]孔祥.某游泳馆焊接空心球网架腐蚀评价及原因探讨[J].山西建筑,2009,35(13):150-151.Kong Xiang.The evaluations and reasons of the corrosion of space truss for welding hollow ball in a swimming pool[J].Shanxi Architecture,2009,35(13):150-151(in Chinese).
[19]施伟,吕鑫,徐大州,等.游泳馆环境下重防腐体系的质量控制方法分析[J].建筑技术开发,2017,44(22):129-131.Shi Wei,LüXin,Xu Dazhou,et al.Analysis on quality control of heavy-duty anticorrosion system for swimming hall[J].Building Technology Development,2017,44(22):129-131(in Chinese).
[20]黎学明,周杰敏,刘强,等.张力对斜拉桥拉索镀锌钢绞线腐蚀行为影响[J].电化学,2007,13(3):297-301.Li Xueming,Zhou Jiemin,Liu Qiang,et al.Effect of tension on the corrosion behavior of galvanized steel wire for cable-stayed bridge[J].Electrochemistry,2007,13(3):297-301(in Chinese).
[21]缪长青,孙传智,陈亮.大跨桥梁缆索构件环境腐蚀当量关系研究[J].水利与建筑工程学报,2010,8(6):5-7.Miao Changqing,Sun Chuanzhi,Chen Liang.Research on equivalent conversion method of environmental corrosion for cable components of large span bridges[J].Journal of Water Conservancy and Construction Engineering,2010,8(6):5-7(in Chinese).
[22]刘成臣,鲁国富,张金奎,等.2A12与30CrMnSiA在相同海洋大气环境中的加速环境谱差异[J].腐蚀与防护,2015,36(7):609-613.Liu Chengchen,Lu Guofu,Zhang Jinkui,et al.Differences between environment spectrum of 2A12 and30Cr Mn Si A in the same ocean atmospheric environment[J].Corrosion&Protection,2015,36(7):609-613(in Chinese).