Lock-up装置在连续梁桥上的减震性能研究
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摘要
以某客运专线上大跨连续梁桥为实际工程背景,研究了Lock-up装置对结构纵向抗震性能的影响。根据Lock-up装置在地震作用下具有反复锁止的受力特点,采用非线性时程分析方法,分析了锁止速度对结构减震性能的影响。结果表明:对于大跨连续梁桥,Lock-up装置能够充分发挥活动墩的抗震承载能力,有效地提高桥梁结构整体抗震性能。当锁止速度较小时,Lock-up装置可以采用大刚度连杆模拟,并假定其始终处于完全锁定状态。但当锁止速度较高时,应考虑Lock-up装置反复锁止的实际工作特点,否则应用上述计算方法所得的结果偏于不安全。
Research on longitudinal seismic performance of the long span continuous girder bridge is presented.According to mechanical characteristic of the lock-up device locked repeatedly,the influnce of lock speed on seismic response reduction of the structure is analyzed by using the non-linear history analysis.The results show that seismic performance of whole long span continuous girder bridge is effectively improved because seismic bearing capacity of movable pier can be made full use of.When lock speed of lock-up device is relatively low,the device can be analyzed with large stiffness rod and assumed that the device is fully locked all the time.when lock speed is relatively high,the mechanical characteristic of the lock-up device locked repeatedly should be considered,otherwise the results obtained by above analytical method is unsafe.
Research on longitudinal seismic performance of the long span continuous girder bridge is presented.According to mechanical characteristic of the lock-up device locked repeatedly,the influnce of lock speed on seismic response reduction of the structure is analyzed by using the non-linear history analysis.The results show that seismic performance of whole long span continuous girder bridge is effectively improved because seismic bearing capacity of movable pier can be made full use of.When lock speed of lock-up device is relatively low,the device can be analyzed with large stiffness rod and assumed that the device is fully locked all the time.when lock speed is relatively high,the mechanical characteristic of the lock-up device locked repeatedly should be considered,otherwise the results obtained by above analytical method is unsafe.
引文
[1]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 of Shi-jiazhuang Railway Institute,2006,19(1):5-9.
[2]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 Xingchong,Shang Yaozhao,Zhang Yongliang,et al.Analysis of seismic reduction performance on the high pier and long span railway simply-supported steel turss girders[J].World Earthquake Engineering,2008,24(1):6-11.
[3]Xie Hongbin.Design of shock transmission units and its application on the paksey bridge in bangladesh[J].Journal of HUST(Urban Science Edi-tion),2004,21(1):91-96.
[4]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 newearthquake protecive system[J].Journal of Shi-jiazhuang Railway Institute,2004,36(12):1665-1668.
[5]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 Cvil EngineeringJournal,2007,40(7):55-61.
[6]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 Disaster Preven-tion and Mitigation Engineering,2007k,27(Suppl.):292-296.
[7]Section 32 Shock Transmission Units AASHTO LRFD Bridge Construction Specifications[S].
[8]Brown D S.Bridge strengthening with shock transmission units[C]//11th World Conference on Earthquake Enguneering.Acapulco,Mexico:PaperNo.1849,1996.
[2]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 Xingchong,Shang Yaozhao,Zhang Yongliang,et al.Analysis of seismic reduction performance on the high pier and long span railway simply-supported steel turss girders[J].World Earthquake Engineering,2008,24(1):6-11.
[3]Xie Hongbin.Design of shock transmission units and its application on the paksey bridge in bangladesh[J].Journal of HUST(Urban Science Edi-tion),2004,21(1):91-96.
[4]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 newearthquake protecive system[J].Journal of Shi-jiazhuang Railway Institute,2004,36(12):1665-1668.
[5]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 Cvil EngineeringJournal,2007,40(7):55-61.
[6]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 Disaster Preven-tion and Mitigation Engineering,2007k,27(Suppl.):292-296.
[7]Section 32 Shock Transmission Units AASHTO LRFD Bridge Construction Specifications[S].
[8]Brown D S.Bridge strengthening with shock transmission units[C]//11th World Conference on Earthquake Enguneering.Acapulco,Mexico:PaperNo.1849,1996.
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