悬索桥锈蚀主缆钢丝力学性能退化研究
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摘要
为研究悬索桥锈蚀主缆钢丝的力学性能退化状态,以运营使用18年的高强钢丝为对象,通过对从悬索桥截取的完整主缆进行检查,提出了最小截面积损失率的锈蚀程度评价指标。根据对服役锈蚀钢丝拉伸试验及破坏断口形貌分析,研究了锈蚀主缆钢丝的力学性能退化规律,建立了锈蚀钢丝退化模型。试验结果表明:锈蚀对钢丝弹性模量基本没有影响,但是锈蚀程度的增大会引起钢丝的延伸率和极限应变大幅度下降,同时也造成极限强度和屈服强度的降低。基于试验结果建立了最小截面积损失率小于10%的锈蚀钢丝本构关系模型,为主缆钢丝力学性能和剩余强度评估提供依据。
To study the mechanical degradation state of the corroded main cable wires of suspension bridge,the high-tensile wires from main cables with 18-year service life were employed and the complete main cable that intercepted from the suspension bridge was inspected. The corrosion degree evaluation index of loss rate of the minimum sectional area was proposed. The degradation rule of mechanical properties of the corroded main cable wires was studied and the degradation model of corroded steel wires was established,according to the tensile test and fracture surface analysis of corroded steel wire in service. The experiment results show that the corrosion has little effect on the elastic modulus of the steel wires.However,the increase of corrosion degree will lead to a significant decrease in elongation and ultimate strain of steel wire;meanwhile,it will also reduce the ultimate strength and yield strength. Based on the test results,the constitutive relation model for the corroded steel wires with the loss rate of the minimum cross-sectional area less than 10% was established,which provided the basis for evaluating the mechanical properties and residual strength of main cable steel wires.
To study the mechanical degradation state of the corroded main cable wires of suspension bridge,the high-tensile wires from main cables with 18-year service life were employed and the complete main cable that intercepted from the suspension bridge was inspected. The corrosion degree evaluation index of loss rate of the minimum sectional area was proposed. The degradation rule of mechanical properties of the corroded main cable wires was studied and the degradation model of corroded steel wires was established,according to the tensile test and fracture surface analysis of corroded steel wire in service. The experiment results show that the corrosion has little effect on the elastic modulus of the steel wires.However,the increase of corrosion degree will lead to a significant decrease in elongation and ultimate strain of steel wire;meanwhile,it will also reduce the ultimate strength and yield strength. Based on the test results,the constitutive relation model for the corroded steel wires with the loss rate of the minimum cross-sectional area less than 10% was established,which provided the basis for evaluating the mechanical properties and residual strength of main cable steel wires.
引文
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[4]严琨,沈锐利,闫勇.大跨度悬索桥鞍座出口处主缆的二次应力[J].重庆交通大学学报(自然科学版),2012,31(2):191-194.YAN Kun,SHEN Ruili,YAN Yong. Secondary stress of the first segment main cable near the saddles in long-span suspension bridge[J]. Journal of Chongqing Jiaotong University(Natural Science),2012,31(2):191-194.
[5]潘骁宇,谢旭,李晓章,等.锈蚀高强度钢丝的力学性能与评级方法[J].浙江大学学报(工学版),2014,48(11):1917-1924.PAN Xiaoyu,XIE Xu,LI Xiaozhang,et al. Mechanical properties and grading method of corroded high-tensile steel wires[J]. Journal of Zhejiang University(Engineering Science),2014,48(11):1917-1924.
[6]李晓章,谢旭,潘骁宇,等.拱桥吊杆锈蚀高强钢丝疲劳性能试验研究[J].土木工程学报,2015,48(11):68-76.LI Xiaozhang,XIE Xu,PAN Xiaoyu,et al. Experimental study on fatigue performance of corroded high tensile steel wires of arch bridge hangers[J]. China Civil Engineering Journal,2015,48(11):68-76.
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[9]NAKAMURA S I. Mechanical properties and remaining strength of corroded bridge wires[J]. Structural Engineering International,2004,14(1):50-54.
[10]NAKAMURA S I,SUZUMURA K. Experimental study on fatigue strength of corroded bridge wires[J]. Journal of Bridge Engineering,2013,18(3):200-209.
[11]李翠娟,石峰,舒新,等.悬索桥主缆中高强钢丝的腐蚀与脆化[J].中外公路,2015,35(4):95-102.LI Cuijuan,SHI Feng,SHU Xin,et al. Corrosion and embrittlement in high-strength wires of suspension bridge cables[J]. Journal of China&Foreign Highway,2015,35(4):95-102.
[12]ROFFEY P. The fracture mechanisms of main cable wires from the forth road suspension[J]. Engineering Failure Analysis,2013,31:430-441.
[13]CLACK C A,COLFORD B R. Forth road bridge main cables:replacement/augmentation study[J]. Bridge Engineering,2010,163(2):79-89.
[14]BARTON S C,VERMAAS G W,DUBY P F,et al. Accelerated corrosion and embrittlement of high-strength bridge wire[J]. Journal of Materials in Civil Engineering,2000,12(1):33-38.
[15]徐俊,陈惟珍,刘学.斜拉索退化机理及钢丝力学模型[J].同济大学学报(自然科学版),2008,36(7):911-915.XU Jun,CHEN Weizhen,LIU Xue. Deterioration mechanism of cables and mechanics model of wires[J]. Journal of Tongji University(Natural Science),2008,36(7):911-915.
[16]XU Jun,CHEN Weizhen. Behavior of wires in parallel wire stayed cable under general corrosion effects[J]. Journal of Constructional Steel Research,2013,85(2):40-47.
[17]乔燕,李爱群,缪长青,等.腐蚀吊索钢丝力学性能退化及分布模型研究[J].武汉理工大学学报(交通科学与工程版),2015,39(2):268-272.QIAO Yan,LI Aiqun,MIU Changqing,et al. Study on distribution of mechanical properties degradation and model of corroded cable wires[J]. Journal of Wuhan University of Technology(Transportation Science&Engineering),2015,39(2):268-272.
[18]徐阳.腐蚀环境下斜拉索高强钢丝退化状态研究[D].哈尔滨:哈尔滨工业大学,2014.XU Yang. Degradation State Research of High-Strength Steel Wires in Corrosive Conditions[D]. Harbin:Harbin Institute of Technology,2014.
[19]SUZUMURA K,NAKAMURA S I,TARUI T. Strength characteristics of corroded galvanized bridge wires[J]. Proceedings of the Japan Society of Civil Engineers,2003(731):367-377.
[20] 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.
[21]王磊,佘强,张旭辉,等.人工气候下腐蚀预应力钢绞线的力学性能研究[J].公路交通科技,2017,34(1):97-102.WANG Lei, SHE Qiang, ZHANG Xuhui, et al. Study on mechanical property of prestressed strands corroded in artificial climate[J]. Journal of Highway and Transportation Research and Development,2017,34(1):97-102.
[22]李富民,袁迎曙,杜健民,等.氯盐腐蚀钢绞线的受拉性能退化特征[J].东南大学学报(自然科学版),2009,39(2):340-344.LI Fumin,YUAN Yingshu,DU Jianmin,et al. Deterioration of tensile behavior of steel strands corroded by chloride[J]. Journal of Southeast University(Natural Science Edition),2009,39(2):340-344.
[23]辛付开,韩依璇,张国荣,等.某在役悬索桥平行钢丝主缆检查及腐蚀规律研究[J].水利与建筑工程学报,2017,15(3):118-122.XIN Fukai,HAN Yixuan,ZHANG Guorong,et al. Inspection and corrosion rule of parallel steel wire main cables of suspension bridge in service[J]. Journal of Water Resources and Architectural Engineering,2017,15(3):118-122.
[24]高怡斐,梁新帮,邓星临.GB/T 228.1—2010《金属材料拉伸试验第1部分:室温试验方法》实施指南[M].北京:中国质检出版社,中国标准出版社,2012.GAO Yifei,LIANG Xinbang,DENG Xinglin. Implementation Guide of GB/T 228. 1—2010 “Tensile Test of Metallic Materials First Parts:Room Temperature Test Method”[M]. Beijing:China Quality Inspection Press,China Standard Press,2012.
[25]李一心,陈华青,张伟君,等.桥梁缆索用热镀锌钢丝:GB/T1701—2008[S].北京:中国标准出版社,2008.LI Yixin, CHEN Huaqing, ZHANG Weijun, et al. Hot-Dip Galvanized Steel Wire for Bridge Cable:GB/T1701—2008[S].Beijing:China Standard Press,2008.
[26]陈先亮.桥梁索体钢丝腐蚀特征和力学性能试验研究[D].南京:东南大学,2015.CHEN Xianliang. Experimental Study on Corrosion Characteristics and Mechanical Properties of Bridge Cable Wires[D]. Nanjing:Southeast University,2015.
[27]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,2006.XU Jun. Damage Evolution Mechanism and Remained Service Life Evaluation of Stayed Cable[D]. Shanghai:Tongji University,2006.
[2]陈小雨,唐茂林,沈锐利.悬索桥主缆钢丝腐蚀速率的影响因素分析[J].重庆交通大学学报(自然科学版),2015,34(1):25-29.CHEN Xiaoyu,TANG Maolin,SHEN Ruili. Influencing factors of main cable wires corrosion rate of suspension bridge[J]. Journal of Chongqing Jiaotong University(Natural Science),2015,34(1):25-29.
[3]陈小雨,沈锐利,唐茂林.悬索桥主缆检测及承载力评估现状与发展[J].重庆交通大学学报(自然科学版),2013,32(增刊1):760-763.CHEN Xiaoyu,SHEN Ruili,TANG Maolin. Current situation and development for detection and bearing capacity evaluation of main cable of suspension bridge[J]. Journal of Chongqing Jiaotong University(Natural Science),2013,32(Sup1):760-763.
[4]严琨,沈锐利,闫勇.大跨度悬索桥鞍座出口处主缆的二次应力[J].重庆交通大学学报(自然科学版),2012,31(2):191-194.YAN Kun,SHEN Ruili,YAN Yong. Secondary stress of the first segment main cable near the saddles in long-span suspension bridge[J]. Journal of Chongqing Jiaotong University(Natural Science),2012,31(2):191-194.
[5]潘骁宇,谢旭,李晓章,等.锈蚀高强度钢丝的力学性能与评级方法[J].浙江大学学报(工学版),2014,48(11):1917-1924.PAN Xiaoyu,XIE Xu,LI Xiaozhang,et al. Mechanical properties and grading method of corroded high-tensile steel wires[J]. Journal of Zhejiang University(Engineering Science),2014,48(11):1917-1924.
[6]李晓章,谢旭,潘骁宇,等.拱桥吊杆锈蚀高强钢丝疲劳性能试验研究[J].土木工程学报,2015,48(11):68-76.LI Xiaozhang,XIE Xu,PAN Xiaoyu,et al. Experimental study on fatigue performance of corroded high tensile steel wires of arch bridge hangers[J]. China Civil Engineering Journal,2015,48(11):68-76.
[7]BETTI R,WEST A C,VEMAAS G,et al. Corrosion and embrittlement in high-strength wires of suspension bridge cables[J]. Journal of Bridge Engineering,2005,10(2):151-162.
[8]BETTI R,YANEV B. Conditions of suspension bridge cables:New York city case study[J]. Journal of the Transportation Research Board,1999,1654(1):105-112.
[9]NAKAMURA S I. Mechanical properties and remaining strength of corroded bridge wires[J]. Structural Engineering International,2004,14(1):50-54.
[10]NAKAMURA S I,SUZUMURA K. Experimental study on fatigue strength of corroded bridge wires[J]. Journal of Bridge Engineering,2013,18(3):200-209.
[11]李翠娟,石峰,舒新,等.悬索桥主缆中高强钢丝的腐蚀与脆化[J].中外公路,2015,35(4):95-102.LI Cuijuan,SHI Feng,SHU Xin,et al. Corrosion and embrittlement in high-strength wires of suspension bridge cables[J]. Journal of China&Foreign Highway,2015,35(4):95-102.
[12]ROFFEY P. The fracture mechanisms of main cable wires from the forth road suspension[J]. Engineering Failure Analysis,2013,31:430-441.
[13]CLACK C A,COLFORD B R. Forth road bridge main cables:replacement/augmentation study[J]. Bridge Engineering,2010,163(2):79-89.
[14]BARTON S C,VERMAAS G W,DUBY P F,et al. Accelerated corrosion and embrittlement of high-strength bridge wire[J]. Journal of Materials in Civil Engineering,2000,12(1):33-38.
[15]徐俊,陈惟珍,刘学.斜拉索退化机理及钢丝力学模型[J].同济大学学报(自然科学版),2008,36(7):911-915.XU Jun,CHEN Weizhen,LIU Xue. Deterioration mechanism of cables and mechanics model of wires[J]. Journal of Tongji University(Natural Science),2008,36(7):911-915.
[16]XU Jun,CHEN Weizhen. Behavior of wires in parallel wire stayed cable under general corrosion effects[J]. Journal of Constructional Steel Research,2013,85(2):40-47.
[17]乔燕,李爱群,缪长青,等.腐蚀吊索钢丝力学性能退化及分布模型研究[J].武汉理工大学学报(交通科学与工程版),2015,39(2):268-272.QIAO Yan,LI Aiqun,MIU Changqing,et al. Study on distribution of mechanical properties degradation and model of corroded cable wires[J]. Journal of Wuhan University of Technology(Transportation Science&Engineering),2015,39(2):268-272.
[18]徐阳.腐蚀环境下斜拉索高强钢丝退化状态研究[D].哈尔滨:哈尔滨工业大学,2014.XU Yang. Degradation State Research of High-Strength Steel Wires in Corrosive Conditions[D]. Harbin:Harbin Institute of Technology,2014.
[19]SUZUMURA K,NAKAMURA S I,TARUI T. Strength characteristics of corroded galvanized bridge wires[J]. Proceedings of the Japan Society of Civil Engineers,2003(731):367-377.
[20] 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.
[21]王磊,佘强,张旭辉,等.人工气候下腐蚀预应力钢绞线的力学性能研究[J].公路交通科技,2017,34(1):97-102.WANG Lei, SHE Qiang, ZHANG Xuhui, et al. Study on mechanical property of prestressed strands corroded in artificial climate[J]. Journal of Highway and Transportation Research and Development,2017,34(1):97-102.
[22]李富民,袁迎曙,杜健民,等.氯盐腐蚀钢绞线的受拉性能退化特征[J].东南大学学报(自然科学版),2009,39(2):340-344.LI Fumin,YUAN Yingshu,DU Jianmin,et al. Deterioration of tensile behavior of steel strands corroded by chloride[J]. Journal of Southeast University(Natural Science Edition),2009,39(2):340-344.
[23]辛付开,韩依璇,张国荣,等.某在役悬索桥平行钢丝主缆检查及腐蚀规律研究[J].水利与建筑工程学报,2017,15(3):118-122.XIN Fukai,HAN Yixuan,ZHANG Guorong,et al. Inspection and corrosion rule of parallel steel wire main cables of suspension bridge in service[J]. Journal of Water Resources and Architectural Engineering,2017,15(3):118-122.
[24]高怡斐,梁新帮,邓星临.GB/T 228.1—2010《金属材料拉伸试验第1部分:室温试验方法》实施指南[M].北京:中国质检出版社,中国标准出版社,2012.GAO Yifei,LIANG Xinbang,DENG Xinglin. Implementation Guide of GB/T 228. 1—2010 “Tensile Test of Metallic Materials First Parts:Room Temperature Test Method”[M]. Beijing:China Quality Inspection Press,China Standard Press,2012.
[25]李一心,陈华青,张伟君,等.桥梁缆索用热镀锌钢丝:GB/T1701—2008[S].北京:中国标准出版社,2008.LI Yixin, CHEN Huaqing, ZHANG Weijun, et al. Hot-Dip Galvanized Steel Wire for Bridge Cable:GB/T1701—2008[S].Beijing:China Standard Press,2008.
[26]陈先亮.桥梁索体钢丝腐蚀特征和力学性能试验研究[D].南京:东南大学,2015.CHEN Xianliang. Experimental Study on Corrosion Characteristics and Mechanical Properties of Bridge Cable Wires[D]. Nanjing:Southeast University,2015.
[27]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,2006.XU Jun. Damage Evolution Mechanism and Remained Service Life Evaluation of Stayed Cable[D]. Shanghai:Tongji University,2006.