索承式桥梁腐蚀吊索安全性能评估
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摘要
腐蚀蚀坑是索承式桥梁吊索力学性能退化的主要原因。基于断裂力学和蚀坑等效,考虑腐蚀蚀坑影响,以吊索在荷载作用下的安全系数小于2.5作为吊索失效判据,建立腐蚀吊索承载力安全性能评估方法,并以袁州大桥钢丝腐蚀速率数据为基础,进行参数敏感性分析和算例计算,研究了各工况下吊索失效时的断丝数量和安全系数小于2.5的时间。结果表明,该方法相比较均匀腐蚀理论模型,考虑了钢丝腐蚀蚀坑对吊索承载力的影响,能够预测钢丝断裂数量和安全系数小于2.5的时间。
Corrosion pit is the main cause of mechanical performance degradation for the cable of cablesupported bridge.Considering corrosion pits andwith the safety factor of cable under load less than 2.5as failure criterion,the method for assessing the safety capability for cable was established based on equivalent crack for corrosion pit and fracture mechanics.The Yuanzhou bridge wire corrosion rate data was taker to perform the parameter sensitivity analysis.,The quantity of broken wires when cable failed and the time with safety coefficient less than 2.5were studied.The results showed that this method could predict wire fracture number and the time with safety coefficient less than 2.5and compared with uniform corrosion theory model,this mehtod provided theoretical reference for cable-supported bridge operation andmaintenance.
Corrosion pit is the main cause of mechanical performance degradation for the cable of cablesupported bridge.Considering corrosion pits andwith the safety factor of cable under load less than 2.5as failure criterion,the method for assessing the safety capability for cable was established based on equivalent crack for corrosion pit and fracture mechanics.The Yuanzhou bridge wire corrosion rate data was taker to perform the parameter sensitivity analysis.,The quantity of broken wires when cable failed and the time with safety coefficient less than 2.5were studied.The results showed that this method could predict wire fracture number and the time with safety coefficient less than 2.5and compared with uniform corrosion theory model,this mehtod provided theoretical reference for cable-supported bridge operation andmaintenance.
引文
[1]Lichtenstein A G.The silver bridge collapse recounted[J].Journal of Performance of Constructed Facilities,1993,7(4):249-261.
[2]Hamilton H R,Breen III J E,Frank K H.Investigation of corrosion protection systems for bridge stay cables[R].Center for Transportation Research,Bureau of Engineering Research,University of Texas at Austin,November,1995.
[3]李宏江,王江,张永明,等.天津永和斜拉桥换索后的索力调整[J].公路交通科技,2008,25(10):79-83.Li H J,Wang J,Zhang Y M,et al.Cable force adjustment after cable replacement for Tianjin Yonghe cable-stayed bridge[J].Journal of Highway Transportation Research and Development,2008,25(10):79-83.(in Chinese)
[4]周诚华,梅秀道.南昌市八一大桥斜拉桥换索工程施工监控[J].世界桥梁,2011(2):73-76.Zhou C H,Mei X D.Construction monitoring and control of cable replacement for cable-stayed bridge of Bayi Bridge in Nanchang City[J].World Bridges,2011(2):73-76.(in Chinese)
[5]谢福君,廖龙辉.衡山湘江公路大桥换索方案研究[J].公路,2013,4:21-24.Xie F J,Miao L H.Research on scheme of cable replacement of Hengshan-Xiangjiang Highway Bridge[J].Highway,2013,4:21-24.(in Chinese)
[6]朱劲松,肖汝诚.大跨度斜拉桥拉索安全性分析方法研究[J].土木工程学报,2006,39(9):74-79.Zhu J S,Xiao R C.A study on the safety assessment method for stay cables of long-span cable-stayed bridges[J].China Civil Engineering Journal,2006,39(9):74-79.(in Chinese)
[7]Elachachi S M,Breysse D,Yotte S,et al.A probabilistic multi-scale time dependent model for corroded structural suspension cables[J].Probabilistic Engineering Mechanics,2006,21(3):235-245.
[8]马小利,王立彬,丁盛.平行钢索的锈蚀时变失效概率分析[J].工程力学,2012,29(4):210-216.Ma X L,Wang L B,Ding S.Time-dependent failure probability analysis of corroded parallel wire cable[J].Engineering Mechanics,2012,29(4):210-216.(in Chinese)
[9]Mahmoud K M.Fracture strength for a high strength steel bridge cable wire with a surface crack[J].Theoretical and Applied Fracture Mechanics,1997,48:152-160.
[10]Bridge Technology Consulting.Main cable investigation at the mid-hudson suspension bridge-fracture toughness identification of main cable ire[R].Technical Report Prepared for the New York State Bridge Authority,New York,2007.
[11]James L A,Mills W J.Review and synthesis of stress intensity factor solution applied to cracks in bolts[J].Engineering Fracture Mech,1988,30:641-654.
[12]Din A S S E,Lovegrove J M.Stress intensity factors for fatigue cracking of round bars[J].International Journal of Fatigue,1981,3(3):117-123.
[13]Daoud O E K,Cartwright D J.Strain energy release rate for a circular-arc edge crack in a bar under tension or bending[J].Journal of Strain Analysis for Engineering Design,1985,20(1):53-58.
[14]Wilhem D,Fitzgerald J,Carter J,et al.An empirical approach to determining K for surface cracks[C]//Proceedings of the Fifth International Conference on Fracture,Cannes,1981:11-21.
[15]Mackay T L,Alperin B J.Stress intensity factors for fatigue cracking in high-strength bolts[J].Engineering Fracture Mechanics,1985,21(2):391-397.
[16]Daoud O E K,Cartwright D J.Strain energy release rate for a circular arc edge crack in a bar under tension or bending[J].Journal of Strain Analysis for Engineering Design,1985,20(1):53-58.
[17]Nezu K,Machida S,Nakamura H.SIF of surface cracks and fatigue crack propagation behavior in a cylindrical bar[C]//Proceedings of the 25th Japan Congress on Material Research,Metallic Materials,1982:87-92.
[18]Wilhem D,Fitzgerald J,Carter J,et al.An empirical approach to determining K for surface cracks[C]//Proccedings of the Fifth International Conference of Fracture,Cannes,1981,1:11-21.
[19]曾勇,陈艾荣,马如进.带裂纹的悬索桥主缆钢丝的断裂强度分析[J].同济大学学报:自然科学版,2009,37(8):1010-1013.Zeng Y,Chen A R,Ma R J.Fracture strength of wires with cracks in suspension bridge[J].Journal of Tongji University:Naturnal Science,2009,37(8):1010-1013.(in Chinese)
[20]Proost Domasky S A,Brooks C L,Honeycutt K T.The application of p-version finite element methods to fracture-dominated problems encountered in engineering practice[J].Computers&Mathematics with Applications,2003,46(1):125-139.
[21]任克亮,吕国志,张有宏.老龄结构分析中腐蚀坑与等效裂纹间的量化关系[J].强度与环境,2006,33(2):50-57.Ren K L,Lyu G Z,Zhang Y H.The correlation between corrosion pit with equivalent initial surface crack[J].Structure&Environment Engineering,2006,33(2):50-57.(in Chinese)
[22]郁大照,陈跃良,柳文林,等.服役环境下腐蚀坑等效为表面裂纹的有效性分析[J].应用力学学报,2011,28(1):79-84.Yu D Z,Chen Y L,Liu W L,et al.Analysis of validation of real pit as surface crack under service environment[J].Chinese Journal of Applied Mechanics,2011,28(1):79-84.(in Chinese)
[23]梁雄.斜拉桥拉索腐蚀行为及其使用寿命预测研究[D].重庆:重庆交通大学,2008.Liang X.Corrosion behavior and service life evaluation study on cable of cable-stayed bridge[D].Chongqing:Chongqing Jiaotong University,2008.(in Chinese)
[24]杨文治.电化学基础[M].北京:北京大学出版社,1982.
[25]Czarnecki A A,Nowak A S.Time-variant reliability profiles for steel girder bridges[J].Structural Safety,2008,30:49-64.
[26]徐宏,黄平明.平行钢丝拉索Daniel效应分析[J].铁道科学与工程学报,2008,5(2):38-41.Xu H,Huang P M.Analysis of Daniel effect for parallel wire cable[J].Journal of Railway Science and Engineering,2008,5(2):38-41.(in Chinese)
[2]Hamilton H R,Breen III J E,Frank K H.Investigation of corrosion protection systems for bridge stay cables[R].Center for Transportation Research,Bureau of Engineering Research,University of Texas at Austin,November,1995.
[3]李宏江,王江,张永明,等.天津永和斜拉桥换索后的索力调整[J].公路交通科技,2008,25(10):79-83.Li H J,Wang J,Zhang Y M,et al.Cable force adjustment after cable replacement for Tianjin Yonghe cable-stayed bridge[J].Journal of Highway Transportation Research and Development,2008,25(10):79-83.(in Chinese)
[4]周诚华,梅秀道.南昌市八一大桥斜拉桥换索工程施工监控[J].世界桥梁,2011(2):73-76.Zhou C H,Mei X D.Construction monitoring and control of cable replacement for cable-stayed bridge of Bayi Bridge in Nanchang City[J].World Bridges,2011(2):73-76.(in Chinese)
[5]谢福君,廖龙辉.衡山湘江公路大桥换索方案研究[J].公路,2013,4:21-24.Xie F J,Miao L H.Research on scheme of cable replacement of Hengshan-Xiangjiang Highway Bridge[J].Highway,2013,4:21-24.(in Chinese)
[6]朱劲松,肖汝诚.大跨度斜拉桥拉索安全性分析方法研究[J].土木工程学报,2006,39(9):74-79.Zhu J S,Xiao R C.A study on the safety assessment method for stay cables of long-span cable-stayed bridges[J].China Civil Engineering Journal,2006,39(9):74-79.(in Chinese)
[7]Elachachi S M,Breysse D,Yotte S,et al.A probabilistic multi-scale time dependent model for corroded structural suspension cables[J].Probabilistic Engineering Mechanics,2006,21(3):235-245.
[8]马小利,王立彬,丁盛.平行钢索的锈蚀时变失效概率分析[J].工程力学,2012,29(4):210-216.Ma X L,Wang L B,Ding S.Time-dependent failure probability analysis of corroded parallel wire cable[J].Engineering Mechanics,2012,29(4):210-216.(in Chinese)
[9]Mahmoud K M.Fracture strength for a high strength steel bridge cable wire with a surface crack[J].Theoretical and Applied Fracture Mechanics,1997,48:152-160.
[10]Bridge Technology Consulting.Main cable investigation at the mid-hudson suspension bridge-fracture toughness identification of main cable ire[R].Technical Report Prepared for the New York State Bridge Authority,New York,2007.
[11]James L A,Mills W J.Review and synthesis of stress intensity factor solution applied to cracks in bolts[J].Engineering Fracture Mech,1988,30:641-654.
[12]Din A S S E,Lovegrove J M.Stress intensity factors for fatigue cracking of round bars[J].International Journal of Fatigue,1981,3(3):117-123.
[13]Daoud O E K,Cartwright D J.Strain energy release rate for a circular-arc edge crack in a bar under tension or bending[J].Journal of Strain Analysis for Engineering Design,1985,20(1):53-58.
[14]Wilhem D,Fitzgerald J,Carter J,et al.An empirical approach to determining K for surface cracks[C]//Proceedings of the Fifth International Conference on Fracture,Cannes,1981:11-21.
[15]Mackay T L,Alperin B J.Stress intensity factors for fatigue cracking in high-strength bolts[J].Engineering Fracture Mechanics,1985,21(2):391-397.
[16]Daoud O E K,Cartwright D J.Strain energy release rate for a circular arc edge crack in a bar under tension or bending[J].Journal of Strain Analysis for Engineering Design,1985,20(1):53-58.
[17]Nezu K,Machida S,Nakamura H.SIF of surface cracks and fatigue crack propagation behavior in a cylindrical bar[C]//Proceedings of the 25th Japan Congress on Material Research,Metallic Materials,1982:87-92.
[18]Wilhem D,Fitzgerald J,Carter J,et al.An empirical approach to determining K for surface cracks[C]//Proccedings of the Fifth International Conference of Fracture,Cannes,1981,1:11-21.
[19]曾勇,陈艾荣,马如进.带裂纹的悬索桥主缆钢丝的断裂强度分析[J].同济大学学报:自然科学版,2009,37(8):1010-1013.Zeng Y,Chen A R,Ma R J.Fracture strength of wires with cracks in suspension bridge[J].Journal of Tongji University:Naturnal Science,2009,37(8):1010-1013.(in Chinese)
[20]Proost Domasky S A,Brooks C L,Honeycutt K T.The application of p-version finite element methods to fracture-dominated problems encountered in engineering practice[J].Computers&Mathematics with Applications,2003,46(1):125-139.
[21]任克亮,吕国志,张有宏.老龄结构分析中腐蚀坑与等效裂纹间的量化关系[J].强度与环境,2006,33(2):50-57.Ren K L,Lyu G Z,Zhang Y H.The correlation between corrosion pit with equivalent initial surface crack[J].Structure&Environment Engineering,2006,33(2):50-57.(in Chinese)
[22]郁大照,陈跃良,柳文林,等.服役环境下腐蚀坑等效为表面裂纹的有效性分析[J].应用力学学报,2011,28(1):79-84.Yu D Z,Chen Y L,Liu W L,et al.Analysis of validation of real pit as surface crack under service environment[J].Chinese Journal of Applied Mechanics,2011,28(1):79-84.(in Chinese)
[23]梁雄.斜拉桥拉索腐蚀行为及其使用寿命预测研究[D].重庆:重庆交通大学,2008.Liang X.Corrosion behavior and service life evaluation study on cable of cable-stayed bridge[D].Chongqing:Chongqing Jiaotong University,2008.(in Chinese)
[24]杨文治.电化学基础[M].北京:北京大学出版社,1982.
[25]Czarnecki A A,Nowak A S.Time-variant reliability profiles for steel girder bridges[J].Structural Safety,2008,30:49-64.
[26]徐宏,黄平明.平行钢丝拉索Daniel效应分析[J].铁道科学与工程学报,2008,5(2):38-41.Xu H,Huang P M.Analysis of Daniel effect for parallel wire cable[J].Journal of Railway Science and Engineering,2008,5(2):38-41.(in Chinese)