基于烦恼率的人行桥振动舒适度评价研究
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摘要
在已有烦恼率模型的基础上结合各国规范采用烦恼率评价人行桥振动舒适度,提出了更适合工程应用的人行桥振动烦恼率曲线及竖向、侧向烦恼率容许值。利用Midas对南京云锦路人行桥进行动力分析,并结合烦恼率曲线对该桥的舒适度进行评价,分别计算了竖向、侧向以及竖向侧向耦合振动等工况的烦恼率,得出该桥的动力性能较差。通过采用调谐质量阻尼器(TMD)对该桥进行减振控制,减振效果明显,得到减振后的烦恼率值满足人行桥振动烦恼率舒适度要求。
Based on the annoyance rate(AR) model and combined with the national codes,the AR curves as well as the vertical and lateral AR permissible value about the vibration of pedestrian bridges suitable for the application of engineerings are put forward here.Furthermore,the dynamic analysis for the pedestrian bridge of Yunjin Road in Nanjing is carried out by using Midas,and the evaluation for the comfort of the bridge is conducted combined with the AR curves.The AR curves of vertical vibration,lateral vibration and vertical-lateral coupling vibration are calculated separately,then it is obtained that the dynamic performance of the bridge is poor.Through using the tuned mass damper(TMD) to control the vibration of the bridge,it is shown that the vibration-damping level is obvious,and the AR value after damping could meet the requirement of the comfort proposed here.
Based on the annoyance rate(AR) model and combined with the national codes,the AR curves as well as the vertical and lateral AR permissible value about the vibration of pedestrian bridges suitable for the application of engineerings are put forward here.Furthermore,the dynamic analysis for the pedestrian bridge of Yunjin Road in Nanjing is carried out by using Midas,and the evaluation for the comfort of the bridge is conducted combined with the AR curves.The AR curves of vertical vibration,lateral vibration and vertical-lateral coupling vibration are calculated separately,then it is obtained that the dynamic performance of the bridge is poor.Through using the tuned mass damper(TMD) to control the vibration of the bridge,it is shown that the vibration-damping level is obvious,and the AR value after damping could meet the requirement of the comfort proposed here.
引文
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[14]李春祥,余琼,王肇民.大跨桥梁结构扭转振动的MTMD控制研究[J].特种结构,2002,19(4):66-70.
[15]李春祥,刘艳霞,王肇民.基于平稳过滤有色噪声地震动模型的MTMD性能评价[J].计算力学学报,2003,20(2):204-211.
[16]李春祥,熊学玉.地震作用下基于ADMF和系统参数组合的最优MTMD[J].计算力学学报,2002,19(3):291-298.
[2]乔玲.关于人体承受全身振动评价的方法[J].铁道劳动安全卫生与环保,1999,26(2):130-133.
[3]中华人民共和国建设部.CJJ69-95.城市人行天桥与人行地道技术规范[S].北京:中国建筑工业出版社,1996.
[4]朱滢.实验心理学[M].北京:北京大学出版社,2000.
[5]涂瑞和,方丹群,战嘉凯,等.用模糊数学原理评价城市居民对环境振动的主观反应[J].中国环境科学,1990,10(5):356-359.
[6]孙利民,闫兴非.人行桥人行激励振动及设计方法[J].同济大学学报,2004,32(8):996-999,1060.
[7]British Standards Institution,BS5400.Steel,concrete andcomposite bridges:Specification for Loads[S].1978.
[8]OntarioHighway Bridge Design Code,OHBDC.Highway En-gineering Division[S].Ontario Ministry ofTransportation andCommunication,Canada,1983.
[9]International Organization for Standardization,ISO10137:1992,Bases for design of structures—serviceability of build-ings against vibration[S].Switzerland,1992.
[10]Bachmann H.Vibration problems in structures:practicalguidelines[M].Basel:Birkhauser Verlag,1995.
[11]International Standard,ISO2631-1:1997.Mechanical v-ibration and shock-evaluation of human exposure to whole-body vibration-part 1:general requirement[S].Internation-al Standards Organization,1997.
[12]Peter W Chen,Leslie E Robertson.Human perceptionthresholds of horizontal motion[J].Journal of the StructuralDivision,ASCE,1972,98(8):1681-1695.
[13]宋志刚.基于烦恼率模型的工程结构振动舒适度设计新理论[D].杭州:浙江大学,2003.
[14]李春祥,余琼,王肇民.大跨桥梁结构扭转振动的MTMD控制研究[J].特种结构,2002,19(4):66-70.
[15]李春祥,刘艳霞,王肇民.基于平稳过滤有色噪声地震动模型的MTMD性能评价[J].计算力学学报,2003,20(2):204-211.
[16]李春祥,熊学玉.地震作用下基于ADMF和系统参数组合的最优MTMD[J].计算力学学报,2002,19(3):291-298.
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