基于自振与频谱特性影响的LRB连续梁桥隔震效果研究
|
摘要
为了探讨桥梁自振特性与地震波频谱特性对LRB隔震效果的影响,以典型三跨连续梁桥为工程背景,采用Bouc-Wen恢复力模型模拟LRB非线性滞回特性,采用Takeda三线性模型模拟桥墩非线性特性,编制了运用Newmark时间积分法和四阶显式Runge-Kutta迭代法联合求解增量形式的全桥非线性运动方程的时程分析程序。利用程序并结合算例对LRB隔震连续梁桥在不同地震激励和不同基本周期影响下的隔震效果进行了分析。结果表明,桥梁结构基本周期和地震激励频谱成分对LRB的隔震效果有较大影响;在易发生低频脉冲型地震波的场地上不宜使用LRB作为桥梁的隔震设备。
In order to investigate the isolated effect of LRB influenced by self-vibration characteristic of the bridge and spectrum characteristic of seismic,taking an typical three-spans continous beam bridge for example,the Bouc-Wen restoring force model is adopted to simulate the nonlinear hysteric characteristic for LRB,the Takeda three linear model is adopted to simulate the nonlinear for pier,and the time-history analyses procedure of the Newmark and the Runge-Kutta iterative strategy used to solve the increment form nonlinear governing equation of motion is programmed.Using the procedure and combining calculation example analyses isolated effect of isolated bridges with LRB influenced by structure self-vibration characteristic and seismic excitation spectrum characteristic.The consequences indicate that structure self-period and spectrum component of seismic excitation have a significant influence on the isolated effect of LRB;the LRB is not suitable for isolated.The impulse pulse with easiest to happened seismic of low-frequency should not take LRB as isolated equipment of bridges.
In order to investigate the isolated effect of LRB influenced by self-vibration characteristic of the bridge and spectrum characteristic of seismic,taking an typical three-spans continous beam bridge for example,the Bouc-Wen restoring force model is adopted to simulate the nonlinear hysteric characteristic for LRB,the Takeda three linear model is adopted to simulate the nonlinear for pier,and the time-history analyses procedure of the Newmark and the Runge-Kutta iterative strategy used to solve the increment form nonlinear governing equation of motion is programmed.Using the procedure and combining calculation example analyses isolated effect of isolated bridges with LRB influenced by structure self-vibration characteristic and seismic excitation spectrum characteristic.The consequences indicate that structure self-period and spectrum component of seismic excitation have a significant influence on the isolated effect of LRB;the LRB is not suitable for isolated.The impulse pulse with easiest to happened seismic of low-frequency should not take LRB as isolated equipment of bridges.
引文
[1]韩强,杜修力,刘晶波.考虑土-结构相互作用的隔震梁桥体系地震反应分析法[J].北京工业大学学报,2009,35(2):179-184.
[2]李黎,刘文静,张行.LRB体系连续梁桥的隔震性能分析[J].华中科技大学学报:自然科学版,2010,38(9):93-97.
[3]朱东升,劳远昌,沈大元,等.LRB隔震桥梁的地震反应特点[J].工程力学,2000,18(1):119-125.
[4]黄建文,朱晞,张静.隔震桥梁结构的简化反应分析及设计参数研究[J].北方交通大学学报,2004,28(1):17-22.
[5]李建中,辛学忠.连续梁桥减震、隔震体系非线性地震反应分析[J].地震工程与工程振动,1998,18(3):67-73.
[6]刘海卿,邵志姣.土-结构相互作用对铅芯橡胶支座[J].地震工程与工程振动,2010,30(3):161-165.
[7]Hwang J S,Sheng L H.Effective Stiffness and Equivalent Damping of Base-isolated Bridges[J].Journal of StructureEngineering,1993,119(10):3094-3101.
[8]Wen Y K.Method of Random Vibration of Hysteretic Systems[J].Journal of Engineering Mechanics Division,1976,102(2):249-263.
[9]Takeda T,Sozen M A,Nielson N N.Reinforced Concrete Response to Simulated Earthquakes[J].Journal of Structur-al Division,1970,96(12):2557-2573.
[10]杜修力,韩强,刘文光.考虑双向耦合非线性的LRB隔震桥梁地震反应分析[J].工程力学,2008,25(3):119-125.
[11]Jangid R S.Seismic Response of Isolated Bridge[J].Journal of Bridge Engineering,2004,9(2):156-166.
[12]陈水生,万益春,野田尚昭.隔震桥梁地震响应非线性分析[J].长安大学学报:自然科学版,2006,26(1):54-58.
[13]唐光武,李建中.JTG/T B02-01—2008,公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
[14]郭全全,张文芳,吴桂英.中国国家大剧院结构地震分析[J].工程力学,2003,20(2):43-48.
[15]柳国环,李宏男,林海.结构地震响应计算模型的比较与分析[J].工程力学,2009,26(2):10-15.
[2]李黎,刘文静,张行.LRB体系连续梁桥的隔震性能分析[J].华中科技大学学报:自然科学版,2010,38(9):93-97.
[3]朱东升,劳远昌,沈大元,等.LRB隔震桥梁的地震反应特点[J].工程力学,2000,18(1):119-125.
[4]黄建文,朱晞,张静.隔震桥梁结构的简化反应分析及设计参数研究[J].北方交通大学学报,2004,28(1):17-22.
[5]李建中,辛学忠.连续梁桥减震、隔震体系非线性地震反应分析[J].地震工程与工程振动,1998,18(3):67-73.
[6]刘海卿,邵志姣.土-结构相互作用对铅芯橡胶支座[J].地震工程与工程振动,2010,30(3):161-165.
[7]Hwang J S,Sheng L H.Effective Stiffness and Equivalent Damping of Base-isolated Bridges[J].Journal of StructureEngineering,1993,119(10):3094-3101.
[8]Wen Y K.Method of Random Vibration of Hysteretic Systems[J].Journal of Engineering Mechanics Division,1976,102(2):249-263.
[9]Takeda T,Sozen M A,Nielson N N.Reinforced Concrete Response to Simulated Earthquakes[J].Journal of Structur-al Division,1970,96(12):2557-2573.
[10]杜修力,韩强,刘文光.考虑双向耦合非线性的LRB隔震桥梁地震反应分析[J].工程力学,2008,25(3):119-125.
[11]Jangid R S.Seismic Response of Isolated Bridge[J].Journal of Bridge Engineering,2004,9(2):156-166.
[12]陈水生,万益春,野田尚昭.隔震桥梁地震响应非线性分析[J].长安大学学报:自然科学版,2006,26(1):54-58.
[13]唐光武,李建中.JTG/T B02-01—2008,公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
[14]郭全全,张文芳,吴桂英.中国国家大剧院结构地震分析[J].工程力学,2003,20(2):43-48.
[15]柳国环,李宏男,林海.结构地震响应计算模型的比较与分析[J].工程力学,2009,26(2):10-15.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心