矮塔斜拉桥的减震方案对比研究
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摘要
针对位于高烈度地震区的刚构连续梁体系矮塔斜拉桥的受力特点,提出了分别采用粘滞液体阻尼器、Lock-up装置及摩擦型滑动支座3种减隔震方案,并采用非线性时程反应分析方法分析了3种方案的减震效果。结果表明:3种减隔震装置对矮塔斜拉桥均有明显的减震效果,粘滞阻尼器及Lock-up装置减震效果较好,滑动摩擦支座的减震效果次之。但从结构的正常使用及结构体系的地震响应分布规律来看,粘滞液体阻尼器的减震方案最优。
Based on mechanical properties of a cable-stayed bridge with low towers and the rigid continuous beam system in the high-intensity earthquake zone,three kinds of schemes on seismic response reduction including viscous dampers,Lock-up device and friction sliding bearings are presented for the cable-stayed bridge,and effectiveness of seismic response reduction is analyzed by using non-linear time history response analysis.The results show that the three types of isolation devices are significantly effective for the cable-stayed bridge.The seismic response reduction of the viscous damper and the Lock-up device is better,that of friction sliding bearing is second.But the viscous damper is optimal for considering normal use of the structure and the distribution rule of its seismic response.
Based on mechanical properties of a cable-stayed bridge with low towers and the rigid continuous beam system in the high-intensity earthquake zone,three kinds of schemes on seismic response reduction including viscous dampers,Lock-up device and friction sliding bearings are presented for the cable-stayed bridge,and effectiveness of seismic response reduction is analyzed by using non-linear time history response analysis.The results show that the three types of isolation devices are significantly effective for the cable-stayed bridge.The seismic response reduction of the viscous damper and the Lock-up device is better,that of friction sliding bearing is second.But the viscous damper is optimal for considering normal use of the structure and the distribution rule of its seismic response.
引文
[1]陈永祁,耿瑞琦,马良喆.桥梁用液体粘滞阻尼器的减震设计和类型选择[J].土木工程学报,2007,40(7):55-61.Chen Yongqi,Geng Ruiqi,Ma Liangzhe.Design and selection of the fluid viscous devices in shock control of bridges[J].China Civil EngineeringJournal,2007,40(7):55-61.
[2]Section 32 Shock Transmission Units AASHTO LRFD Bridge Construction Specifications(interim edition)[S],2002.
[3]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.Cheng Xingchong,Shang Yaozhao,Zhang Yongliang,et al.Analysis of seismic reduction performance on the high pier and long span railway sim-ply-supported steel truss girders[J].World Earthquake Engineering,2008,24(1):6-11.
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[5]殷海军,王志强,胡世德.连续梁桥设置阻尼器参数分析[J].同济大学学报(自然科学版),2004,32(11):1437-1441.Yin Haijun,Wang Zhiqiang,Hu Shide.Analysis of continuous bridge adopted dampers[J].Journal of TongJi University(Natural Science),2004,32(11):1437-1441.
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[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 Aijun,Fan Lichu.Seismic response reduction of a super-long-span cable-stayed bridge by adding dampers[J].Journal of TongJi University(Natural Science),2006,34(7):859-863.
[8]王志强,葛继平.粘滞阻尼器和Lock-up装置在连续梁桥抗震中应用[J].石家庄铁道学院学报,2006,19(1):5-9.Wang Zhiqiang,Ge Jiping.Application of viscous damper and lock-up devices in the seismic design of continuous girder bridges[J].Journal ofShijiazhuang Railway Institute,2006,19(1):5-9.
[9]王磊,刘寒冰,吴斌喧,等.新型地震结构保护系统的大跨径桥梁抗震分析[J].哈尔滨工业大学学报,2004,36(12):1665-1668.Wang Lei,Liu Hanbing,Wu Binxuan,et al.Seismic response analysis for long span bridge with new earthquake protective system[J].Journal ofHarbin University of Techrology 2004,36(12):1665-1668.
[10]许广,闫维明.大跨度连续梁桥中Lock-up装置计算模型的改进[J].防灾减灾工程学报,2007,27(增刊):292-296.Xu Guang,Yan Weiming.Improvement of analytical model on lock-up devices for long span continuous girder bridge[J].Journal of DisasterPrevention and Mitigation Engineering,2007,27(Suppl.):292-296.
[11]Brown D S.Bridge strengthening with shock transmission units[A].11th World Conference on Earthquake Enguneering[C].Acapulco,Mexico:Paper No.1849,1996.
[12]范立础,聂利英,李建中.地震作用下板式橡胶支座滑动的动力性能分析[J].中国公路学报,2003,16(4):30-35.Fan Lichu,Nie Liying,Li Jianzhong.Dynamic characteristic analysis of laminated rubber bearing sliding under earthquake[J].China Journal ofHighway and Transport,2003,16(4):30-35.
[13]王常峰,陈兴冲,朱东生.活动支座摩擦力对桥梁抗震性能的影响参数分析[J].世界地震工程,2005,21(4):82-87.Wang Changfeng,Chen Xingchong,Zhu Dongsheng.Analysis on the influence of the friction force at the movable supports on the seismic per-formance of a bridge[J].World Earthquake Engineering,2005,21(4):82-87.
[2]Section 32 Shock Transmission Units AASHTO LRFD Bridge Construction Specifications(interim edition)[S],2002.
[3]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.Cheng Xingchong,Shang Yaozhao,Zhang Yongliang,et al.Analysis of seismic reduction performance on the high pier and long span railway sim-ply-supported steel truss girders[J].World Earthquake Engineering,2008,24(1):6-11.
[4]张永亮,陈兴冲,吴海燕.基于粘滞液体阻尼器的铁路钢桁梁桥减震分析[J].世界地震工程,2009,25(4):97-102.Zhang Yongliang,Cheng Xingchong,Wu Haiyan.Research of viscous damper on seismic response reduction in the railwaysteel truss girder bridge[J].World Earthquake Engineering,2009,25(4):97-102.
[5]殷海军,王志强,胡世德.连续梁桥设置阻尼器参数分析[J].同济大学学报(自然科学版),2004,32(11):1437-1441.Yin Haijun,Wang Zhiqiang,Hu Shide.Analysis of continuous bridge adopted dampers[J].Journal of TongJi University(Natural Science),2004,32(11):1437-1441.
[6]方海,李升玉,王曙光,等.高烈度区连续梁桥的减震设计方法研究[J].地震工程与工程振动,2005,25(6):178-182.Fang Hai,Li Shengyu,Wang Shuguang,et al.Research on earthquake-reduction design method of continuous bridge in a high-intensity earth-quake area[J].Journal of Earthquake Engineering and Engineering Vibration,2005,25(6):178-182.
[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 Aijun,Fan Lichu.Seismic response reduction of a super-long-span cable-stayed bridge by adding dampers[J].Journal of TongJi University(Natural Science),2006,34(7):859-863.
[8]王志强,葛继平.粘滞阻尼器和Lock-up装置在连续梁桥抗震中应用[J].石家庄铁道学院学报,2006,19(1):5-9.Wang Zhiqiang,Ge Jiping.Application of viscous damper and lock-up devices in the seismic design of continuous girder bridges[J].Journal ofShijiazhuang Railway Institute,2006,19(1):5-9.
[9]王磊,刘寒冰,吴斌喧,等.新型地震结构保护系统的大跨径桥梁抗震分析[J].哈尔滨工业大学学报,2004,36(12):1665-1668.Wang Lei,Liu Hanbing,Wu Binxuan,et al.Seismic response analysis for long span bridge with new earthquake protective system[J].Journal ofHarbin University of Techrology 2004,36(12):1665-1668.
[10]许广,闫维明.大跨度连续梁桥中Lock-up装置计算模型的改进[J].防灾减灾工程学报,2007,27(增刊):292-296.Xu Guang,Yan Weiming.Improvement of analytical model on lock-up devices for long span continuous girder bridge[J].Journal of DisasterPrevention and Mitigation Engineering,2007,27(Suppl.):292-296.
[11]Brown D S.Bridge strengthening with shock transmission units[A].11th World Conference on Earthquake Enguneering[C].Acapulco,Mexico:Paper No.1849,1996.
[12]范立础,聂利英,李建中.地震作用下板式橡胶支座滑动的动力性能分析[J].中国公路学报,2003,16(4):30-35.Fan Lichu,Nie Liying,Li Jianzhong.Dynamic characteristic analysis of laminated rubber bearing sliding under earthquake[J].China Journal ofHighway and Transport,2003,16(4):30-35.
[13]王常峰,陈兴冲,朱东生.活动支座摩擦力对桥梁抗震性能的影响参数分析[J].世界地震工程,2005,21(4):82-87.Wang Changfeng,Chen Xingchong,Zhu Dongsheng.Analysis on the influence of the friction force at the movable supports on the seismic per-formance of a bridge[J].World Earthquake Engineering,2005,21(4):82-87.
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