客运专线桥梁的地震能量响应分析
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摘要
在依据能量平衡原理建立的客运专线桥梁地震能量方程的基础上,考虑柔性地基效应和地震动特性的影响,利用大型有限元分析(FEA)软件ANSYS建立某客运专线双柱式桥墩的FEA模型。研究了考虑土-结构相互作用效应的客运专线桥梁进入非弹性状态后的地震能量响应以及各类能量在结构整体系统中的分配规律。分析结果表明:结构滞回耗能和阻尼耗能是客运专线桥梁消耗地震能量的主要方式,而土-结构相互作用和地震动峰值加速度(PGA)对客运专线桥梁的地震总输入能、滞回耗能、阻尼耗能有显著影响,不容忽视。
The energy equations of bridges of passenger dedicated line are established based on the energy equilibrium theory.Considering the effect of flexible base effects and seismic characteristics,the FEA(Finite Element Analysis) model of one double-column pier of passenger dedicated line is established by using FEA software ANSYS.Then,the seismic energy response and its distribution rules at the nonlinear state of bridges are studied.The study results show that the seismic input energy is mainly consumed by hysteretic energy dissipation and damping energy dissipation.Meanwhile,the soil-structure interaction effects and peak ground acceleration have great effects on the seismic input energy,hysteretic energy dissipation and damping energy dissipation.
The energy equations of bridges of passenger dedicated line are established based on the energy equilibrium theory.Considering the effect of flexible base effects and seismic characteristics,the FEA(Finite Element Analysis) model of one double-column pier of passenger dedicated line is established by using FEA software ANSYS.Then,the seismic energy response and its distribution rules at the nonlinear state of bridges are studied.The study results show that the seismic input energy is mainly consumed by hysteretic energy dissipation and damping energy dissipation.Meanwhile,the soil-structure interaction effects and peak ground acceleration have great effects on the seismic input energy,hysteretic energy dissipation and damping energy dissipation.
引文
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[9]Gaetano Manfredi.Evaluation of seismic energy demand[J].Earthquake Engineering and Structural Dynamics,2001,30(7):485-499.
[10]Mario Ordaz,Benjamin Huerta.Exact computation of input-energy spectra from fourier amplitude spectra[J].Earth-Quake Engineering and Structural Dynamics,2003,32(6):597-605.
[11]李宇.考虑残余位移和土一结构相互作用的桥梁结构基于性能的抗震设计及评估[D].北京:北京交通大学,2010.LI Yu.Research on Performance-based Seismic Design and Evaluation for Bridge Structures Considering ResidualDisplacement and Soil-structure Interaction Effects[D].Beijing:Beijing Jiaotong Univercity,2010.
[12]GB50111—2006.铁路工程抗震设计规范[S].GB50111—2006.Code for Seismic Design of Railway Engineering[S].JTG/TB02-01—2008.公路桥梁抗震设计细则[S].
[13]JTG/TB02-01—2008.Guidelines for Seismic Design of Highway[S].
[2]Akiyama H.Earthquake resistant design based on the energy concept[A].Proceedings of 9th WCEE[C],1988:905-910.
[3]Michel Bruneau,Niandi Wang.Some aspects of energy methods for the inelastic seismic response of ductile SDOF struc-tures[J].Engineering Structures,1996,18(1):1-12.
[4]Luis D.Decanini,Fbrizio MollaioliTTiandi.An energy-based methodology for the assessment of seismic demand[J].SoilDynamics and Earthquake Engineering,2001,21(2):113-137.
[5]熊仲明,史庆轩.框架结构基于能量地震反应分析及设计方法的理论研究[J].世界地震工程,2005,21(2):141-146.XIONG Zhong-ming,SHI Qing-xuan.Theoretical study on seismic response and design method of frame structures withenergy method[J].World Information on Earthquake Engineering,2005,21(2):141-146.
[6]Anindya Dutta.Bridge on Energy Based Seismic Analysis and Design of Highway[D].New York:State University of NewYork at Buffalo,1999.
[7]江辉,朱晞.近断层强震速度脉冲效应及连续梁桥减隔震特性分析[J].中国安全科学学报,2003,13(12):57-62.JIANG Hui,ZHU Xi.Velocity pulse effects of near-fault earthquakes and isolation characteristic of continuous girderbridge[J].China Safety Science Journal,2003,13(12):57-62.
[8]Uang CM,Bertero V.V.Evaluation of seismic energy in structures[J].Earthquake Engineering and Structural Dynam-ics,1990,19(5):77-90.
[9]Gaetano Manfredi.Evaluation of seismic energy demand[J].Earthquake Engineering and Structural Dynamics,2001,30(7):485-499.
[10]Mario Ordaz,Benjamin Huerta.Exact computation of input-energy spectra from fourier amplitude spectra[J].Earth-Quake Engineering and Structural Dynamics,2003,32(6):597-605.
[11]李宇.考虑残余位移和土一结构相互作用的桥梁结构基于性能的抗震设计及评估[D].北京:北京交通大学,2010.LI Yu.Research on Performance-based Seismic Design and Evaluation for Bridge Structures Considering ResidualDisplacement and Soil-structure Interaction Effects[D].Beijing:Beijing Jiaotong Univercity,2010.
[12]GB50111—2006.铁路工程抗震设计规范[S].GB50111—2006.Code for Seismic Design of Railway Engineering[S].JTG/TB02-01—2008.公路桥梁抗震设计细则[S].
[13]JTG/TB02-01—2008.Guidelines for Seismic Design of Highway[S].
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