凤台淮河大桥斜拉索索力测试
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摘要
由于现场环境的复杂性以及斜拉索自身的特性,很难由频谱图直接得出索体的基本频率。在直接频差法的基础上,运用最小二乘法原理,介绍了一种求拉索基频的间接方法(简称"间接频差法"),并应用于凤台淮河大桥的索力测试中,与1993,1999和2004年实测值进行对比,证明了这种方法的有效性。
Owing to the complexity of environment and the character of cable itself,it is difficult to identify the fundamental frequency from spectrum.The paper proposes another method to identify the fundamental frequency,called indirect method using least-squares,based on direct frequency difference method.This method was used in force testing of Fengtai Huaihe River Bridge.The test result proved that this method was effective compared with the measured value of year 1993,1999,2004.
Owing to the complexity of environment and the character of cable itself,it is difficult to identify the fundamental frequency from spectrum.The paper proposes another method to identify the fundamental frequency,called indirect method using least-squares,based on direct frequency difference method.This method was used in force testing of Fengtai Huaihe River Bridge.The test result proved that this method was effective compared with the measured value of year 1993,1999,2004.
引文
[1]方志,张智勇.斜拉索的索力测试[J].中国公路学报,1997,10(1):51-58.FANG Zhi,ZHANG Zhi-yong.Test of cable tension in cable-stayed bridges[J].China Journal of Highway and Transport,1997,10(1):51-58.(in Chinese)
[2]郭良友,林一宁,李文波,等.武汉长江二桥的索力、温度和应力测量[J].桥梁建设,1995(3):44-53.GUO Liang-you,LIN Yi-ning,LI Wen-bo,et al.Measurement of cable force,temperature and stress about the 2nd YangtzeRiver Bridge at Wuhan City[J].Bridge Construction,1995(3):44-53.(in Chinese)
[3]李枝军,李爱群,缪长青,等.运营状态下南京长江二桥拉索索力测试与分析[J].东南大学学报:自然科学版,2007,37(6):1057-1060.LI Zhi-jun,LI Ai-qun,MIAO Chang-qing,et al.Measurement and analysis of cable tension in the second Nanjing Yangtza RiverBridge under running condition[J].Journal of Southeast University:Natural Science Edition,2007,37(6):1057-1060.(inChinese)
[4]孔祥杰,崔来军,张宾,等.大直径高吨位斜拉索索力测试于分析[J].铁道建筑技术,2008(2):23-26.KONG Xiang-jie,CUI Lai-jun,ZHANG Bin,et al.Cable tension measurement and analysis of heavy-load larger-diameter cables[J].Railway Construction Technology,2008(2):23-26.(in Chinese)
[5]张宏跃,田石柱.提高斜拉索索力估计精度的方法[J].地震工程与工程振动,2004,24(4):148-151.ZHANG Hong-yue,TIAN Shi-zhu.A method to enhance the estimation accuracy of stay cable tension[J].EarthquakeEngineering and Engineering Vibration,2004,24(4):148-151.(in Chinese)
[6]陈文革,蔡键.斜拉索索力的测试方法[J].华东公路,1998,110(1):61-63.CHEN Wen-ge,CAI Jian.The method of cable force test about cable-stayed bridge[J].East China Highway,1998,110(1):61-63.(in Chinese)
[2]郭良友,林一宁,李文波,等.武汉长江二桥的索力、温度和应力测量[J].桥梁建设,1995(3):44-53.GUO Liang-you,LIN Yi-ning,LI Wen-bo,et al.Measurement of cable force,temperature and stress about the 2nd YangtzeRiver Bridge at Wuhan City[J].Bridge Construction,1995(3):44-53.(in Chinese)
[3]李枝军,李爱群,缪长青,等.运营状态下南京长江二桥拉索索力测试与分析[J].东南大学学报:自然科学版,2007,37(6):1057-1060.LI Zhi-jun,LI Ai-qun,MIAO Chang-qing,et al.Measurement and analysis of cable tension in the second Nanjing Yangtza RiverBridge under running condition[J].Journal of Southeast University:Natural Science Edition,2007,37(6):1057-1060.(inChinese)
[4]孔祥杰,崔来军,张宾,等.大直径高吨位斜拉索索力测试于分析[J].铁道建筑技术,2008(2):23-26.KONG Xiang-jie,CUI Lai-jun,ZHANG Bin,et al.Cable tension measurement and analysis of heavy-load larger-diameter cables[J].Railway Construction Technology,2008(2):23-26.(in Chinese)
[5]张宏跃,田石柱.提高斜拉索索力估计精度的方法[J].地震工程与工程振动,2004,24(4):148-151.ZHANG Hong-yue,TIAN Shi-zhu.A method to enhance the estimation accuracy of stay cable tension[J].EarthquakeEngineering and Engineering Vibration,2004,24(4):148-151.(in Chinese)
[6]陈文革,蔡键.斜拉索索力的测试方法[J].华东公路,1998,110(1):61-63.CHEN Wen-ge,CAI Jian.The method of cable force test about cable-stayed bridge[J].East China Highway,1998,110(1):61-63.(in Chinese)
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