摩擦单摆支座等效摩擦系数数值仿真及试验研究
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摘要
对摩擦单摆支座的主要参数等效摩擦系数进行了数值仿真及试验研究,为桥梁结构的减隔震设计提供了参考。数值仿真包括等效摩擦系数与滑动面和转动面的摩擦系数、竖向承载力及加载频率三者关系的研究,对比分析了模拟结果与试验结果。结果表明:当滑动面与转动面的摩擦系数为不同取值时,支座等效摩擦系数的模拟值略大于理论值,初步验证了支座等效摩擦系数理论公式的正确性;通过模拟结果与试验结果的对比分析,进一步验证了该理论公式的合理性。
In order to guide bridge structure seismic isolation design,numerical simulation and experimental research were done to study equivalent friction coefficient,which is the main parameter for friction sliding bearing with simple pendulum. The numerical simulation includes the analysis of relationship between the equivalent friction coefficient and the friction coefficients of sliding surface and rotating surface,the vertical bearing capacity and the loading frequency,and its results were compared with experimental results. The results show that when the friction coefficients between the sliding surface and the rotating surface are different or not,the simulation value of the equivalent friction coefficient is slightly larger than the theoretical value,which preliminarily verifies the correctness of the theoretical formula of the bearing equivalent friction coefficient. The rationality of the formula is further verified by the comparative analysis between the simulation results and the experimental results.
In order to guide bridge structure seismic isolation design,numerical simulation and experimental research were done to study equivalent friction coefficient,which is the main parameter for friction sliding bearing with simple pendulum. The numerical simulation includes the analysis of relationship between the equivalent friction coefficient and the friction coefficients of sliding surface and rotating surface,the vertical bearing capacity and the loading frequency,and its results were compared with experimental results. The results show that when the friction coefficients between the sliding surface and the rotating surface are different or not,the simulation value of the equivalent friction coefficient is slightly larger than the theoretical value,which preliminarily verifies the correctness of the theoretical formula of the bearing equivalent friction coefficient. The rationality of the formula is further verified by the comparative analysis between the simulation results and the experimental results.
引文
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[10]苏良建.摩擦摆支座的摩擦系数影响因素分析[J].广东建材,2015,10:54-56.SU Liangjian.Analysis of friction coefficient influencing factors of friction pendulum bearing[J].Guangdong Building Materials,2015,10:54-56.(in Chinese)
[11]焦驰宇,胡世德,管仲国.FPS抗震支座分析模型的比较研究[J].振动与冲击,2007,26(10):113-117.JIAO Chiyu,HU Shide,GUAN Zhongguo.Comparison study on analysis models of FPS seismic isolation support[J].Journal of Vibration and Shock,2007,26(10):113-117.(in Chinese)
[12]董擎.基于摩擦摆支座的城市大跨连续梁桥减震性能研究[J].世界桥梁,2014,42(6):46-49.DONG Qing.Study of vibration mitigation property of urban long-span continuous girder bridge with friction pendulum bearings[J].World Bridge,2014,42(6):46-49.(in Chinese)
[13]王建强,攸青言,丁永刚等.支座摩擦系数对摩擦摆基础隔震结构地震反应的影响[J].世界地震工程,2012,28(2):98-102.WANG Jianqiang,YOU Qingyan,DING Yonggang,et al.Influence of friction coefficient of bearing on seismic response of base-isolated structure with friction pendulum bearing[J].World Earthquake Engineering,2012,28(2):98-102.(in Chinese)
[2]陈志江,黄利顺,俞奇效.双曲面球形铸钢支座设计与应用[J].施工技术,2010,39(6):124-126.CHEN Zhijiang,HUANG Lishun,YU Qixiao.Design and application of hyperboloid steel ball bearings[J].Construction Technology,2010,39(6):124-126.(in Chinese)
[3]周云,龚健,邓雪松.变曲率摩擦复摆隔震支座的简化分析与数值仿真[J].工程力学,2012,29(7):163-171.ZHOU Yun,GONG Jian,DENG Xuesong.Simplified analysis and numerical simulation of double variable curvature friction pendulum isolation bearing[J].Engineering Mechanics,2012,29(7):163-171.(in Chinese)
[4]韩强,刘卫刚,杜修力,等.多球面滑动摩擦隔震支座计算模型及试验确认[J].中国公路学报,2012,25(5):82-88.HAN Qiang,LIU Weigang,DU Xiuli,et al.Computational model and experimental validation of multi-spherical sliding friction isolation bearings[J].China Journal of Highway and Transport,2012,25(5):82-88.(in Chinese)
[5]VIRGINIO Quaglini,PAOLO Dubini.Bearings and seismic systems for concrete structures[C].Assessment sliding materials for pendulum isolation bearings[A].7th World Congress on Joints,2011.10:1-7.
[6]李雄彦,薛素铎,潘克君.铜基面抗拔摩擦摆支座的力学性能研究[J].振动与冲击,2013,32(6):84-89.LI Xiongyan,XUE Suduo,PAN Kejun.Mechanical property of uplift-restraint friction pendulum bearing support with Cu-stainless interfaces[J].Journal of Vibration and Shock,2013,32(6):84-89.(in Chinese)
[7]MOKHA A,CONSTANTINOU M,REINHORN A.Experimental study of friction-pendulum isolation system[J].Structural Engineering,ASCE,1991,117(4):1201-1207.
[8]MOKHA A,CONSTANTINOU M,REINHORN A.Verification of friction model of Teflon bearings under Triaxial load[J].Structural Engineering,ASCE,1993,119(1):240-261.
[9]曾聪,陶忠,潘文,等.PTFE-不锈钢摩擦滑移隔震支座摩擦系数的影响因素研究[J].工程抗震与加固改造,2009,31(1):58-63.ZENG Cong,TAO Zhong,PAN Wen,et al.Research of the influence factors of the friction coefficient between PTFE and stainless steel plate of FPE[J].Earthquake Resistant Engineering and Retrofitting,2009,31(1):58-63.(in Chinese)
[10]苏良建.摩擦摆支座的摩擦系数影响因素分析[J].广东建材,2015,10:54-56.SU Liangjian.Analysis of friction coefficient influencing factors of friction pendulum bearing[J].Guangdong Building Materials,2015,10:54-56.(in Chinese)
[11]焦驰宇,胡世德,管仲国.FPS抗震支座分析模型的比较研究[J].振动与冲击,2007,26(10):113-117.JIAO Chiyu,HU Shide,GUAN Zhongguo.Comparison study on analysis models of FPS seismic isolation support[J].Journal of Vibration and Shock,2007,26(10):113-117.(in Chinese)
[12]董擎.基于摩擦摆支座的城市大跨连续梁桥减震性能研究[J].世界桥梁,2014,42(6):46-49.DONG Qing.Study of vibration mitigation property of urban long-span continuous girder bridge with friction pendulum bearings[J].World Bridge,2014,42(6):46-49.(in Chinese)
[13]王建强,攸青言,丁永刚等.支座摩擦系数对摩擦摆基础隔震结构地震反应的影响[J].世界地震工程,2012,28(2):98-102.WANG Jianqiang,YOU Qingyan,DING Yonggang,et al.Influence of friction coefficient of bearing on seismic response of base-isolated structure with friction pendulum bearing[J].World Earthquake Engineering,2012,28(2):98-102.(in Chinese)
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