某人行桥人致振动分析及其舒适度评价
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摘要
通过模拟人行随机荷载激励,分别采用四种人行荷载工况对一座既有钢结构人行桥进行了人致振动时程分析,从而更好地了解该人行桥在行人激励下的动力特性。考虑到现有人行桥的动力特点及对其振动舒适度评价方法的不足,提出了考虑结构双向耦合振动的舒适度评价方法,并对该桥进行了舒适度评价,证明了该桥在动力性能上存在的问题。这对人行桥人行荷载模拟、人行桥振动舒适度评价以及防振减振研究都具有参考借鉴意义。
According to simulating stochastic pedestrian loads,and adopting four load cases respectively,it analyzed the time-history responses of an existing steel footbridge,which made the dynamic characteristics of the bridge understood better.By considering the dynamic characteristics of modern footbridges and the deficiencies of comfort evaluation method,it proposes a new evaluation method by considering coupling effect of bi-direction vibration.Using this method,a conclusion is drawn that some problems exist in dynamic performance of this footbridge certainly.This procedure,for simulating pedestrian loads,comfort evaluation and vibration reduction study,can be reference for similar engineering.
According to simulating stochastic pedestrian loads,and adopting four load cases respectively,it analyzed the time-history responses of an existing steel footbridge,which made the dynamic characteristics of the bridge understood better.By considering the dynamic characteristics of modern footbridges and the deficiencies of comfort evaluation method,it proposes a new evaluation method by considering coupling effect of bi-direction vibration.Using this method,a conclusion is drawn that some problems exist in dynamic performance of this footbridge certainly.This procedure,for simulating pedestrian loads,comfort evaluation and vibration reduction study,can be reference for similar engineering.
引文
[1]法永生,李东.某人行天桥动力测试及其动力特性的有限元分析[J].建筑结构,2007,38(4):66-68.
[2]JTG D60—2004公路桥涵设计通用规范[S].北京:人民交通出版社,2004.
[3]廖顺痒.人行天桥的设计与施工[M].上海:同济大学出版社,1995.
[4]MATSUMOTO Y,NISHIOKA T,SHIOJIRI H,et al.Dynamic designof footbridges[C].IABSE Proceedings,1978:1-15.
[5]BACHMANN H,PRETLOVE A,RAINER H.Vibration problems instructures:practical guidelines[M].Basel:Birkhauser Verlag,1995.
[6]HAUKSSON F.Dynamic behavior of footbridges subjected topedestrian-induced vibrations[D].Master’s thesis,Lund University,Sweden,2005.
[7]ISO 10137.Bases for Design of Structures-Serviceability of BuildingsAgainst Vibrations[S].International Standardization Organization,Geneva,Switzerland,1992.
[8]British Standards Institution(BSI).British standard specification forloads;steel,concrete and composite bridges,part 2.[S].BS 5400,London,1978.
[9]ISO2631-1:1997.Mechanical vibration and shock-evaluation ofhuman exposure to whole-body vibration-part 1:general requirement[S].International Standardization Organization,Geneva,Switzerland,1997.
[10]ZIVANOVIC S,PAVIC A,REYNOLDS P.Vibration serviceability offootbridges under human-induced excitation:A literature review[J].Journal of Sound and Vibration.2005.
[11]叶正强,李爱群,等.某大跨人行天桥的消能减振设计(一)[J].特种结构,2003,20(1):68-70.
[12]方重,吕西林.电液伺服式TMD结构控制系统分析[J].世界地震工程,1994(4):18-23.
[2]JTG D60—2004公路桥涵设计通用规范[S].北京:人民交通出版社,2004.
[3]廖顺痒.人行天桥的设计与施工[M].上海:同济大学出版社,1995.
[4]MATSUMOTO Y,NISHIOKA T,SHIOJIRI H,et al.Dynamic designof footbridges[C].IABSE Proceedings,1978:1-15.
[5]BACHMANN H,PRETLOVE A,RAINER H.Vibration problems instructures:practical guidelines[M].Basel:Birkhauser Verlag,1995.
[6]HAUKSSON F.Dynamic behavior of footbridges subjected topedestrian-induced vibrations[D].Master’s thesis,Lund University,Sweden,2005.
[7]ISO 10137.Bases for Design of Structures-Serviceability of BuildingsAgainst Vibrations[S].International Standardization Organization,Geneva,Switzerland,1992.
[8]British Standards Institution(BSI).British standard specification forloads;steel,concrete and composite bridges,part 2.[S].BS 5400,London,1978.
[9]ISO2631-1:1997.Mechanical vibration and shock-evaluation ofhuman exposure to whole-body vibration-part 1:general requirement[S].International Standardization Organization,Geneva,Switzerland,1997.
[10]ZIVANOVIC S,PAVIC A,REYNOLDS P.Vibration serviceability offootbridges under human-induced excitation:A literature review[J].Journal of Sound and Vibration.2005.
[11]叶正强,李爱群,等.某大跨人行天桥的消能减振设计(一)[J].特种结构,2003,20(1):68-70.
[12]方重,吕西林.电液伺服式TMD结构控制系统分析[J].世界地震工程,1994(4):18-23.
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