地震动速度脉冲对大跨斜拉桥减震控制的影响
|
摘要
地震动的速度脉冲特性是加重工程结构在地震中的破坏程度的重要因素,速度脉冲已成为近断层地震动的重要工程特性之一.以一座大跨飘浮体系斜拉桥为例,选择了4组具有速度脉冲特性的实际地震动加速度记录及人工模拟的具有相同加速度反应谱而无速度脉冲的地震动时程分别作为地震动输入,利用三维有限元方法计算了地震动的速度脉冲对斜拉桥地震反应和减震控制反应,分析了地震动速度脉冲对斜拉桥地震反应和减震控制效果的影响特征.总体上看,斜拉桥在速度脉冲型地震动作用下的地震反应大部分要大于无速度脉冲型地震动的,近断层地震动的速度脉冲对斜拉桥无控制、半主动控制和被动控制地震反应均具有一定的不利影响,且地震动的速度脉冲对半主动控制和被动控制减震效果的影响趋势大体相同.
The velocity pulse of near-fault ground motions can aggravate the earthquake damage to engineering structures.The velocity pulse is regarded as one of the important engineering characteristics of near-fault ground motions affecting the earthquake damages to engineering structures.The seismic responses and structural control effects were simulated by three dimensional finite element model for long-span floating cable-stayed bridges with and without the vibration control system,in which four strong motion records with velocity pulse and corresponding synthetic time histories with same response spectra and without velocity pulse were used as ground motion inputs.The characteristics of velocity pulse influence were discussed respectively on seismic responses of long-span floating cable-stayed bridges with and without the vibration control system.The study shows that seismic responses of cable-stayed bridge to ground motions with velocity pulse are greater than those to ground motions without velocity pulse,and ground motions with velocity pulse can make strong disadvantageous influence on seismic responses of bridges with un-control,semi-active control and passive control systems,and the influence is almost same on responses of bridges with semi-active control and passive control systems.
The velocity pulse of near-fault ground motions can aggravate the earthquake damage to engineering structures.The velocity pulse is regarded as one of the important engineering characteristics of near-fault ground motions affecting the earthquake damages to engineering structures.The seismic responses and structural control effects were simulated by three dimensional finite element model for long-span floating cable-stayed bridges with and without the vibration control system,in which four strong motion records with velocity pulse and corresponding synthetic time histories with same response spectra and without velocity pulse were used as ground motion inputs.The characteristics of velocity pulse influence were discussed respectively on seismic responses of long-span floating cable-stayed bridges with and without the vibration control system.The study shows that seismic responses of cable-stayed bridge to ground motions with velocity pulse are greater than those to ground motions without velocity pulse,and ground motions with velocity pulse can make strong disadvantageous influence on seismic responses of bridges with un-control,semi-active control and passive control systems,and the influence is almost same on responses of bridges with semi-active control and passive control systems.
引文
[1]叶爱君,范立础.附加阻尼器对超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):859-863Ye 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
[2]亓兴军,李小军.大跨飘浮体系斜拉桥减震控制研究[J].振动与冲击,2007,26(3):79-82Qi Xingjun,Li Xiaojun.Study on seismic response control for a long-span floating cable-stayed bridge[J].Journal ofVibration and Shock,2007,26(3):79-82
[3]亓兴军,李小军,李美玲.设置黏滞阻尼器的大跨斜拉桥抗震分析[J].铁道建筑,2007,2007(1):1-3Qi Xingjun,Li Xiaojun,Li Meiling.Seismic analysis for a long-span cable-stayed bridge with visco-dampers[J].Railway Engineering,2007,2007(1):1-3
[4]杨飏,欧进萍.导管架式海洋平台模型结构磁流变阻尼隔震数值分析[J].应用基础与工程科学学报,2007,15(2):183-189Yang Yang,Ou Jinping.Numerical analysis of jacket offshore platform model isolation structure with mr damper[J].Basic Science and Engineering,2007,15(2):183-189
[5]周媛,赵凤新,霍新,等.地震动位移峰值对斜拉桥地震反应的影响[J].中国地震,2006,23(4):418-424Zhou Yuan,Zhao Fengxin,Huo Xin,et al.The influence of peak ground displacements on the seismic response of largespan cable-stayed bridge[J].Earthquake Research in China,2006,23(4):418-424
[6]Murat Dicleli.Performance of seismic-isolated bridges in relation to near-fault ground-motion and isolator characteristics[J].Earthquake Spectra,2006,22(4):887-907
[7]王昊,谭平,殷伟希,等.近场下桥梁结构的地震响应分析[J].华南地震,2010,30(2):9-14Wang Hao,Tan Ping,Yin Weixi,et al.Seismic response of bridge structure in near-field[J].South China Journal ofSeismology,2010,30(2):9-14
[8]Vu Phan,Saiid Saiidi M,ASCE F,et al.Near-fault ground motion effects on reinforced concrete bridge columns[J].Journal of Structural Engineering,ASCE,2007,133(7):982-989
[9]王统宁,刘健新,于泳波.近断层地震动作用下减隔震桥梁空间动力分析[J].交通运输工程学报,2009,9(5):20-25Wang Tongning,Liu Jianxin,Yu Yongbo.Spatial Dynamic analysis of isolated bridges subjected to near-fault groundmotion[J].Journal of Traffic and Transportation Engineering,2009,9(5):20-25
[10]李新乐,朱晞.近断层地震速度脉冲效应对桥墩地震反应的影响[J].北方交通大学学报,2004,28(1):11-16Li Xinle,Zhu Xi.Velocity pulse for near-fault ground motions and its effect on seismic response of pier[J].Journal ofNorthern Jiaotong University,2004,28(1):11-16
[11]杨迪雄,李刚,程耿东.近断层脉冲型地震动作用下隔震结构地震反应分析[J].地震工程与工程振动,2005,25(2):119-124Yang Dixiong,Li Gang,Cheng Gengdong.Seismic analysis of base-isolated structures subjected to near-fault pulse-likeground motions[J].Earthquake Engineering and Engineering Vibration,2005,25(2):119-124
[12]Polsak Tothong,Allin Cornell C.Structural performance assessment under near-source pulse-like ground motions usingadvanced ground motion intensity measures[J].Earthquake Engineering and Structural Dynamics,2008,37(7):1013-1037
[13]李新乐,朱晞.近场地震速度脉冲效应及模拟模型的研究[J].中国安全科学学报,2003,13(12):48-52Li Xinle Zhu Xi.Study on velocity pulse effect and its simulated model for near-fault ground motions[J].China SafetyScience Journal,2003,13(12):48-52
[2]亓兴军,李小军.大跨飘浮体系斜拉桥减震控制研究[J].振动与冲击,2007,26(3):79-82Qi Xingjun,Li Xiaojun.Study on seismic response control for a long-span floating cable-stayed bridge[J].Journal ofVibration and Shock,2007,26(3):79-82
[3]亓兴军,李小军,李美玲.设置黏滞阻尼器的大跨斜拉桥抗震分析[J].铁道建筑,2007,2007(1):1-3Qi Xingjun,Li Xiaojun,Li Meiling.Seismic analysis for a long-span cable-stayed bridge with visco-dampers[J].Railway Engineering,2007,2007(1):1-3
[4]杨飏,欧进萍.导管架式海洋平台模型结构磁流变阻尼隔震数值分析[J].应用基础与工程科学学报,2007,15(2):183-189Yang Yang,Ou Jinping.Numerical analysis of jacket offshore platform model isolation structure with mr damper[J].Basic Science and Engineering,2007,15(2):183-189
[5]周媛,赵凤新,霍新,等.地震动位移峰值对斜拉桥地震反应的影响[J].中国地震,2006,23(4):418-424Zhou Yuan,Zhao Fengxin,Huo Xin,et al.The influence of peak ground displacements on the seismic response of largespan cable-stayed bridge[J].Earthquake Research in China,2006,23(4):418-424
[6]Murat Dicleli.Performance of seismic-isolated bridges in relation to near-fault ground-motion and isolator characteristics[J].Earthquake Spectra,2006,22(4):887-907
[7]王昊,谭平,殷伟希,等.近场下桥梁结构的地震响应分析[J].华南地震,2010,30(2):9-14Wang Hao,Tan Ping,Yin Weixi,et al.Seismic response of bridge structure in near-field[J].South China Journal ofSeismology,2010,30(2):9-14
[8]Vu Phan,Saiid Saiidi M,ASCE F,et al.Near-fault ground motion effects on reinforced concrete bridge columns[J].Journal of Structural Engineering,ASCE,2007,133(7):982-989
[9]王统宁,刘健新,于泳波.近断层地震动作用下减隔震桥梁空间动力分析[J].交通运输工程学报,2009,9(5):20-25Wang Tongning,Liu Jianxin,Yu Yongbo.Spatial Dynamic analysis of isolated bridges subjected to near-fault groundmotion[J].Journal of Traffic and Transportation Engineering,2009,9(5):20-25
[10]李新乐,朱晞.近断层地震速度脉冲效应对桥墩地震反应的影响[J].北方交通大学学报,2004,28(1):11-16Li Xinle,Zhu Xi.Velocity pulse for near-fault ground motions and its effect on seismic response of pier[J].Journal ofNorthern Jiaotong University,2004,28(1):11-16
[11]杨迪雄,李刚,程耿东.近断层脉冲型地震动作用下隔震结构地震反应分析[J].地震工程与工程振动,2005,25(2):119-124Yang Dixiong,Li Gang,Cheng Gengdong.Seismic analysis of base-isolated structures subjected to near-fault pulse-likeground motions[J].Earthquake Engineering and Engineering Vibration,2005,25(2):119-124
[12]Polsak Tothong,Allin Cornell C.Structural performance assessment under near-source pulse-like ground motions usingadvanced ground motion intensity measures[J].Earthquake Engineering and Structural Dynamics,2008,37(7):1013-1037
[13]李新乐,朱晞.近场地震速度脉冲效应及模拟模型的研究[J].中国安全科学学报,2003,13(12):48-52Li Xinle Zhu Xi.Study on velocity pulse effect and its simulated model for near-fault ground motions[J].China SafetyScience Journal,2003,13(12):48-52
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