减隔震装置在飘浮体系斜拉桥纵桥向的应用
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摘要
以某双塔飘浮体系斜拉桥为工程背景,对比分析了拉索限位器和黏滞阻尼器两种减隔震装置在飘浮体系斜拉桥纵桥向的减震特点,并进一步探讨了拉索限位器和黏滞阻尼器联合使用方式对飘浮体系斜拉桥纵桥向地震响应的影响.结果表明:拉索限位器同黏滞阻尼器相比,可以更有效地控制结构位移,而黏滞阻尼器在内力控制上具有一定的优越性;联合使用方式有助于发挥各自的优势,达到拉索限位器控制梁端位移、黏滞阻尼器改善塔底受力的理想状况,是一种更为经济有效的减震措施,且在脉冲型地震动作用下同样具有良好的减震效果.
On the background of a double pylon cable-stayed bridge of floating system,the aseismic characteristics of cable displacement restrainers and viscous dampers was compared.The effect of hybrid application of cable displacement restrainers and viscous dampers on the longitudinal seismic response of floating system cable-stayed bridge was discussed.The results show that the cable displacement restrainer is able to control the displacement response effectively compared with the viscous damper,but the viscous damper has certain advantages in the internal force control.The hybrid application can achieve the goal that cable displacement restrainers control the displacement at beam ends and viscous dampers improve the force situation at the tower bottom,which is a more costeffective seismic measure and has an excellent earthquake mitigation effect under pulse ground motions.
On the background of a double pylon cable-stayed bridge of floating system,the aseismic characteristics of cable displacement restrainers and viscous dampers was compared.The effect of hybrid application of cable displacement restrainers and viscous dampers on the longitudinal seismic response of floating system cable-stayed bridge was discussed.The results show that the cable displacement restrainer is able to control the displacement response effectively compared with the viscous damper,but the viscous damper has certain advantages in the internal force control.The hybrid application can achieve the goal that cable displacement restrainers control the displacement at beam ends and viscous dampers improve the force situation at the tower bottom,which is a more costeffective seismic measure and has an excellent earthquake mitigation effect under pulse ground motions.
引文
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[7]焦驰宇,李建中,彭天波.塔梁连接方式对大跨度斜拉桥地震反应的影响[J].振动与冲击,2009,28(10):179.JIAO Chiyu,LI Jianzhong,PENG Tianbo.Effects of different connecting styles between towers and deck on seismic responses of a long-span cable-stayed bridge[J].Journal of Vibration and Shock,2009,28(10):179.
[8]YUAN Wancheng,CAO Xinjian,RONG Zhaojun.Development and experimental study on cable-sliding friction aseismic bearing[J].Journal of Harbin Engineering University,2010,31(12):1593.
[9]钟剑,荣肇骏,袁万城,等.桥梁拉索减震限位器:中国,ZL201120534749.6[P].2012-11-07.ZHONG Jian,RONG Zhaojun,YUAN Wancheng,et al.Bridge cable aseismic displacement restrainer:China,ZL201120534749.6[P].2012-11-07.
[10]蔡茂江.考虑近断层脉冲特性的斜拉桥黏滞阻尼器参数优化设计[D].上海:同济大学,2013.CAI Maojiang.Viscous damper parameters optimization analysis of cable stayed bridges subjected to pulse type near fault ground motions[D].Shanghai:Tongji University,2013.
[2]中华人民共和国住房和城乡建设部.CJJ 166—2011城市桥梁抗震设计规范[S].北京:中国建筑工业出版社,2011.Ministry of Housing and Urban-Rural Development of the People’s Republic of China.CJJ 166—2011 Code for seismic design of urban bridges[S].Beijing:China Architecture and Building Press,2011.
[3]叶爱君,胡世德,范立础.斜拉桥抗震结构体系研究[J].桥梁建设,2002(4):1.YE Aijun,HU Shide,FAN Lichu.Research on aseismatic structural system of cable-stayed bridge[J].Bridge Construction,2002(4):1.
[4]叶爱君,范立础.附加阻尼器对超大跨度斜拉桥的减震效果[J].同济大学学报:自然科学版,2006,34(7):859.YE Aijun,FAN Lichu.Seismic response reduction of a superlong-span cable-stayed bridge by adding dampers[J].Journal of Tongji University:Natural Science,2006,34(7):859.
[5]李建中,袁万城.斜拉桥减震、耗能体系非线性纵向地震反应分析[J].中国公路学报,1998,11(1):71.LI Jianzhong,YUAN Wancheng.Nonlinear longitudinal seismic response analysis of cable-stayed bridge systems with energy dissipation[J].China Journal of Highway and Transport,1998,11(1):71.
[6]胡庆安,崔刚,刘健新.黏滞阻尼器在斜拉桥减震设计中的应用[J].公路,2006(8):77.HU Qing’an,CUI Gang,LIU Jianxin.Application of viscous damper to aseismatic design of cable-stayed bridge[J].Highway,2006(8):77.
[7]焦驰宇,李建中,彭天波.塔梁连接方式对大跨度斜拉桥地震反应的影响[J].振动与冲击,2009,28(10):179.JIAO Chiyu,LI Jianzhong,PENG Tianbo.Effects of different connecting styles between towers and deck on seismic responses of a long-span cable-stayed bridge[J].Journal of Vibration and Shock,2009,28(10):179.
[8]YUAN Wancheng,CAO Xinjian,RONG Zhaojun.Development and experimental study on cable-sliding friction aseismic bearing[J].Journal of Harbin Engineering University,2010,31(12):1593.
[9]钟剑,荣肇骏,袁万城,等.桥梁拉索减震限位器:中国,ZL201120534749.6[P].2012-11-07.ZHONG Jian,RONG Zhaojun,YUAN Wancheng,et al.Bridge cable aseismic displacement restrainer:China,ZL201120534749.6[P].2012-11-07.
[10]蔡茂江.考虑近断层脉冲特性的斜拉桥黏滞阻尼器参数优化设计[D].上海:同济大学,2013.CAI Maojiang.Viscous damper parameters optimization analysis of cable stayed bridges subjected to pulse type near fault ground motions[D].Shanghai:Tongji University,2013.
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