刚构连续梁体系铁路矮塔斜拉桥的减震研究
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摘要
以新型刚构连续梁体系铁路矮塔斜拉桥为实际工程背景,研究黏滞液体阻尼器对结构纵向抗震性能的影响。采用非线性时程反应分析方法,从结构的减震效果及便于阻尼器的局部连接构造设计角度出发,对非线性黏滞液体阻尼器的阻尼系数和阻尼指数进行参数敏感性分析,并探讨地震动加速度峰值及频谱特性对减震效果的影响。结果表明:合理选择黏滞阻尼器的力学参数,刚构连续梁体系铁路矮塔斜拉桥具有显著的减震效果,但减震效果受地震动的频谱特性影响较为敏感。
Research on Longitudinal anti-seismic performance of the extradosed cable-stayed railway bridge with the rigid continuous beam system was conducted under the action of instulled viscous liquid dampers.Sensitivity analysis on the damping coefficient and damping exponent of the viscous liquid damper was made with the non-linear time history response analysis method and from the point of improving structural seismic responses and facilitating design of local connection of the dampers,and the influnce of peak acceleration and spectrum characteristics of earthquake vibration on damping of seismic responses was studied.The results show that if mechanical parameters of the viscous liquid damper is reasonably selected,significant damping of seismic responses can be obtained for extradosed cable-stayed railway bridges with the rigid continuous beam systems,however damping of seismic responses is sensitive to spectrum characteristics of earthquake vibrations.
Research on Longitudinal anti-seismic performance of the extradosed cable-stayed railway bridge with the rigid continuous beam system was conducted under the action of instulled viscous liquid dampers.Sensitivity analysis on the damping coefficient and damping exponent of the viscous liquid damper was made with the non-linear time history response analysis method and from the point of improving structural seismic responses and facilitating design of local connection of the dampers,and the influnce of peak acceleration and spectrum characteristics of earthquake vibration on damping of seismic responses was studied.The results show that if mechanical parameters of the viscous liquid damper is reasonably selected,significant damping of seismic responses can be obtained for extradosed cable-stayed railway bridges with the rigid continuous beam systems,however damping of seismic responses is sensitive to spectrum characteristics of earthquake vibrations.
引文
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[2]刘世忠,欧阳永金.独塔单索面部分斜拉桥力学性能及建设实践[M].北京:中国铁道出版社,2006.
[3]上官萍,蔡鹏程,卓卫东,等.部分斜拉桥体系参数对动力特性的影响[J].福州大学学报(自然科学版),2007,35(6):888-892.SHANGGUAN Ping,CAI Peng-cheng,ZHUO Wei-dong,et al.Parameter Influencing Analysis on Dynamic Charac-teristic of Extradosed PC Bridge[J].Journal of Fuzhou U-niversity(Natural Science),2007,35(6):888-892.
[4]蔺鹏臻,周世军,刘凤奎,等.单索面矮塔斜拉桥的动力特征参数研究[J].振动与冲击,2006,25(6):150-153.LIN Peng-zhen,ZHOU Shi-jun,LIU Feng-kui,et al.Study on Dynamic Characteristic Parameter of an Extra-dosed Cable-stayed Bridge with Single Cable Plane[J].Journal of Vibration and Shock,2006,25(6):150-153.
[5]陈兴冲,商耀兆,张永亮,等.高墩大跨度铁路简支钢桁梁桥的减震性能分析[J].世界地震工程,2008,24(1):6-11.CHEN Xing-chong,SHANG Yao-zhao,ZHANG Yong-li-ang,et al.Analysis of Seismic Reduction Performance onthe High Pier and Long Span Railway Simply-supportedSteel Truss Girders[J].World Earthquake Engineering,2008,24(1):6-11.
[6]徐秀丽,于兰珍,王曙光,等.高墩连续梁桥减震设计研究[J].工程抗震与加固改造,2005,27(5):63-67.XU Xiu-li,YU Lan-zhen,WANG Shu-guang,et al.Stud-y on Seismic Design for High-pier Continuous Girder Bridg-es[J].Earthquake Resistant Engineering and Retrofitting,2005,27(5):63-67.
[7]叶爱君,范立础.附加阻尼器对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):859-863.YE Ai-jun,FAN Li-chu.Seismic Response Reduction of aSuper-Long-Span Cable-Stayed Bridge by Adding Dampers[J].Journal of TongJi University(Natural Science),2006,34(7):859-863.
[8]王志强,胡世德,范立础.东海大桥黏滞阻尼器参数研究[J].中国公路学报,2005,18(3):37-42.WANG Zhi-qiang,HU Shi-de,FAN Li-chu.Research onViscous Damper Parameters of Donghai Bridge[J].ChinaJournal of Highway and Transport,2005,18(3):37-42.
[9]梁智垚,李建中.大跨度公铁两用斜拉桥阻尼参数研究[J].同济大学学报(自然科学版),2007,35(6):728-733.LIANG Zhi-yao,LI Jian-zhong.Research on Damper Pa-rameters of Long-Span Rail-Cum-Road CabIe-Stayed Bridge[J].Journal of TongJi University(Natural Science),2007,35(6):728-733.
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