设置限位器双向隔震铁路桥梁车桥耦合动力响应研究
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摘要
对铅芯橡胶双向隔震铁路桥梁在列车荷载作用下的力学性能进行了研究,针对双向隔震铁路桥梁中存在的问题,提出了设置限位器的解决方案,并对设置限位器的双向隔震铁路桥梁进行了车桥耦合动力响应分析。研究结果表明,采用常规隔震设计方法的铅芯橡胶支座在横桥向的初始刚度和屈服强度均不能满足规范要求,设置限位器后,双向隔震铁路桥梁的力学性能有了很大的改善,各项指标均满足列车运行安全性和平稳性要求。
The mechanical properties of lead rubber bidirectional seismic isolated railway bridges under train loads were studied,and a real time modal synthesis method for researching the train-bridge coupling vibration responses of non-linear bridges was proposed.With respect to the problems in bidirectional seismic isolated railroad bridges,the solution by installing steel restrainers was presented,and then,the train-bridge coupling vibration dynamic response analysis of the bidirectional seismic isolated railway bridges with steel restrainers was carried out.The studies show that,when using the conventional isolation design approaches,the initial stiffness and yield strength of lead rubber bearing in the lateral direction cannot meet the requirements of the standard.However,after installing the steel displacement restrainer, the mechanical properties of bidirectional seismic isolated railroad bridges were improved greatly and each indicator can meet the demand of safety and stationarity for train operating.
The mechanical properties of lead rubber bidirectional seismic isolated railway bridges under train loads were studied,and a real time modal synthesis method for researching the train-bridge coupling vibration responses of non-linear bridges was proposed.With respect to the problems in bidirectional seismic isolated railroad bridges,the solution by installing steel restrainers was presented,and then,the train-bridge coupling vibration dynamic response analysis of the bidirectional seismic isolated railway bridges with steel restrainers was carried out.The studies show that,when using the conventional isolation design approaches,the initial stiffness and yield strength of lead rubber bearing in the lateral direction cannot meet the requirements of the standard.However,after installing the steel displacement restrainer, the mechanical properties of bidirectional seismic isolated railroad bridges were improved greatly and each indicator can meet the demand of safety and stationarity for train operating.
引文
[1]Kunde M C,Jiangid R S.Seismic behavior of isolated bridges:A-state-of-the-art review[J].Electronic Journal of Structural Engineering,2003,3(2):140- 169.
[2]Huang W H.Bi-directional testing,modeling,and system response of seismically isolated bridges[D]. Berkeley:University of California,2002.
[3]Ghosh G,Sing Y.Bi-directional effects on the response of an isolated bridge[J].International Journal of Recent Trends in Engineering,2009,1(6):6-10.
[4]夏禾.车辆与结构动力相互作用[M].北京:科学出版社,2005.154-171. Xia H.Dynamic Interaction of Vehicles and Structures [M].Beijing:Science Press,2005.154-171.
[5]钟铁毅,杨风利,吴彬.铅芯橡胶支座隔震铁路简支梁桥双向地震响应分析[J].中国铁道科学,2007,28 (3):38-43. Zhong T Y,Yang F L,Wu B.Analysis of the bidirectional seismic responses for seismically isolated railway simple supported beam bridge by Lead Rubber Bearing[J].China Railway Science,2007,28(3):38- 43.
[6]吴彬.铅芯橡胶支座力学性能及其在桥梁工程中减隔震应用的研究[D].北京:中国铁道科学研究院, 2003. Wu B.Study on mechanical characteristic of lead-rubber bearing and the response of isolated bridge with the lead-rubber bearing[D].Beijing:China Academy of Railway Sciences,2003.
[7]于芳,周福霖,温留汉·黑沙.设置双向隔震支座铁路桥梁的耦合振动响应[J].东南大学学报,2010,40 (3):565-569. Yu F,Zhou F L,WenLiuhan·H S.Investigation of the coupling dynamic response between bidirectional seismic isolated railway bridge and train load[J]. Journal of Southeast University,2010,40(3 ):565- 569.
[8]Bowe C J,Mullarkey T P.Wheel-rail contact elements incorporating irregularities[J].Advances in Engineering Software,2005,36(11-12):827-837.
[9]铁运函(2004)120号,铁路桥梁检定规范[S].
[10]GB 5599-85,铁道车辆动力学性能评定和试验鉴定规范[S].
[2]Huang W H.Bi-directional testing,modeling,and system response of seismically isolated bridges[D]. Berkeley:University of California,2002.
[3]Ghosh G,Sing Y.Bi-directional effects on the response of an isolated bridge[J].International Journal of Recent Trends in Engineering,2009,1(6):6-10.
[4]夏禾.车辆与结构动力相互作用[M].北京:科学出版社,2005.154-171. Xia H.Dynamic Interaction of Vehicles and Structures [M].Beijing:Science Press,2005.154-171.
[5]钟铁毅,杨风利,吴彬.铅芯橡胶支座隔震铁路简支梁桥双向地震响应分析[J].中国铁道科学,2007,28 (3):38-43. Zhong T Y,Yang F L,Wu B.Analysis of the bidirectional seismic responses for seismically isolated railway simple supported beam bridge by Lead Rubber Bearing[J].China Railway Science,2007,28(3):38- 43.
[6]吴彬.铅芯橡胶支座力学性能及其在桥梁工程中减隔震应用的研究[D].北京:中国铁道科学研究院, 2003. Wu B.Study on mechanical characteristic of lead-rubber bearing and the response of isolated bridge with the lead-rubber bearing[D].Beijing:China Academy of Railway Sciences,2003.
[7]于芳,周福霖,温留汉·黑沙.设置双向隔震支座铁路桥梁的耦合振动响应[J].东南大学学报,2010,40 (3):565-569. Yu F,Zhou F L,WenLiuhan·H S.Investigation of the coupling dynamic response between bidirectional seismic isolated railway bridge and train load[J]. Journal of Southeast University,2010,40(3 ):565- 569.
[8]Bowe C J,Mullarkey T P.Wheel-rail contact elements incorporating irregularities[J].Advances in Engineering Software,2005,36(11-12):827-837.
[9]铁运函(2004)120号,铁路桥梁检定规范[S].
[10]GB 5599-85,铁道车辆动力学性能评定和试验鉴定规范[S].
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