大跨钢楼盖人群荷载激励下减振控制分析
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摘要
在人群荷载激励作用下,大跨钢楼盖极易产生影响正常使用的振动。采用两种不同的人群荷载模型,考虑不同人员密度、不同步行频率情况,计算分析了某火车站高架候车大厅大跨度钢结构楼盖在人群步行荷载激励下的振动情况并进行了振动控制。计算结果表明在楼盖指定钢梁跨中安置TMD-粘滞流体阻尼器消能减振装置后,有效地削减了该楼盖的振动响应。采用人群全部同步模型时,所有工况下平均减振率为16.86%,在共振工况下减振率达38%以上;采用步频服从正态分布模型时,不同人群密度条件下减振率在15.50%～15.80%之间,验证了步频服从正态分布模型具有一定的准确性,为实际工程设计提供了理论依据。
Large-span steel plates will produce vibration to affect the normal use under crowd load excitation.The vibration condition of large span steel structure floor of a railway station is analyzed under the crowd load.Tuned mass damper(TMD) system and fluid viscous dampers are installed in the middle span of steel beam located.The crowd load considers different person densities,different walking frequencies.Dynamical analysis and results prove that the vibration energy dissipation can effectively reduce the resonance response of the large-span floor structure.The mean ratio of vibration reduction rate comes up to 16.86% of all cases,and the reduction rate of resonance case exceeds 38% with crowd all synchronous model.The reduction rates are 15.50% to 15.80% at different density conditions with walk frequencies normal distribution model.This verifies the correctness of the load simulation method of walk frequency normal distribution model and provide theory basis for practical engineering design.
Large-span steel plates will produce vibration to affect the normal use under crowd load excitation.The vibration condition of large span steel structure floor of a railway station is analyzed under the crowd load.Tuned mass damper(TMD) system and fluid viscous dampers are installed in the middle span of steel beam located.The crowd load considers different person densities,different walking frequencies.Dynamical analysis and results prove that the vibration energy dissipation can effectively reduce the resonance response of the large-span floor structure.The mean ratio of vibration reduction rate comes up to 16.86% of all cases,and the reduction rate of resonance case exceeds 38% with crowd all synchronous model.The reduction rates are 15.50% to 15.80% at different density conditions with walk frequencies normal distribution model.This verifies the correctness of the load simulation method of walk frequency normal distribution model and provide theory basis for practical engineering design.
引文
[1]黄梦雅.大跨楼盖人行荷载下的减振控制[D].南京:东南大学,2009.
[2]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.
[3]沈顺高,刘先明,叶继红,等.首都机场四机位机库的动力特性测试及理论分析[J].东南大学学报:自然科学版,2003,33(1):76-78.Shen Shungao,Liu Xianming,Ye Jihong,et al.Test and analysiss of dynamic characteristic of hangar of capital airport[J].Journal of Southeast University:Natural Science Edition,2003,33(1):76-78.(in Chi-nese)
[4]孙广俊,李爱群,黄镇,等.首都机场机库动力特性测试与分析[J].振动、测试与诊断,2010,30(2):158-162.Sun Guangjun,Li Aiqun,Huang Zhen,et al.Test and analysis of dynamic characteristic of AMECO-A380maintenance hangar in beijing capital airport[J].Journal of Vibration,Measurement&Diagnosis,2010,30(2):158-162.(in Chinese)
[5]朱鸣,张志强,柯长华,等.大跨度钢结构楼盖竖向振动舒适度的研究[J].建筑结构,2008,38(1):72-76.Zhu Ming,Zhang Zhiqiang,Ke Changhua,et al.Study on improving people′s comfortableness on large-span steel floor structures[J].Building Structure,2008,38(1):72-76.(in Chinese)
[6]Allen D E,Onysko D M,Murray T M.Minimizing floor vibration ATC design guide1[S].California:Applied Technology Council,1999.
[7]陈宇.步行荷载激励下大跨人行桥的振动研究与减振研究[D].北京:清华大学,2007.
[8]Murray T M,Allen D E,Ungar E E.Floor vibration due to human activity.AISC design guide11[S].Chicago:American Institute of Steel Construction,1997.
[9]Ebrahimpour A,Fitts L L.Measuring coherency of human-induced rhythmic loads using force plates[J].Journal of Structural Engineering,1996,122(7):829-831.
[10]李爱群,张志强,俞剑锋,等.西安北站站房楼盖振动舒适度减振设计与分析报告[R].南京:东南大学土木工程学院,2010.
[11]李爱群,张志强,陈鑫,等.长沙站站房楼盖振动舒适度减振设计与分析报告[R].南京:东南大学土木工程学院,2009.
[12]张志强,马斐,李爱群,等.大跨钢结构楼盖人群荷载响应分析[J].沈阳建筑大学学报,2011,27(3):517-523.Zhang Zhiqiang,Ma Fei,Li Aiqun,et al.Response a-nalysis of large-span steel structure floor Under crowdload[J].Journal of Shenyang Jianzhu University,2011,27(3):517-523.(in Chinese)
[13]叶正强,李爱群,徐幼麟.工程结构粘滞流体阻尼器减振新技术及其应用[J].东南大学学报:自然科学报,2002,32(3):466-473.Ye Zhengqiang,Li Aiqun,Xu Youlin.Fluid viscous damper technology and its engineering application for structural vibration energy dissipation[J].Journal of Southeast University:Natural Science Edition,2002,32(3):466-473.(in Chinese)
[14]焦常科,李爱群,王浩.三塔悬索桥地震响应控制[J].振动、测试与诊断,2011,31(2):156-161.Jiao Changke,Li Aiqun,Wang Hao.Seismic response control for triple-tower suspension bridges[J].Journal of Vibration,Measurement&Diagnosis,2011,31(2):156-161.(in Chinese)
[15]周福霖.工程结构减震控制[M].北京:地震出版社,1997:211.
[16]周星德,明保华.采用半主动TMD的建筑结构振动控制研究[J].振动、测试与诊断,2006,26(2):116-118.Zhou Xingde,Ming Baohua.Research on semi-active TMD of building structure vibration control[J].Jour-nal of Vibration,Measurement&Diagnosis,2006,26(2):116-118.(in Chinese)
[17]李爱群.工程结构减振控制[M].北京:机械工业出版社,2007:239-241.
[18]马斐,张志强,李爱群.大跨高空连廊人群荷载下TMD减振控制分析[J].建筑结构,2011,41(4):1399-1403.Ma Fei,Zhang Zhiqiang,Li Aiqun.Vibration control analysis of large-span corridor under crowd load with TMD[J].Building Structure,2011,41(4):1399-1403.(in Chinese)
[19]Lippert S.Human reactions to vertical vibration[J].Society of Automotive Engineers Journal,1947,55(5):32-34.
[20]BS EN1990Eurocode.Basis of structure design[S].London:British Standards Institution(BSI),2002.
[21]Bs5400British standard specification for loads,steel,concrete and composite bridges,Part2[S].London:British Standards Institution(BSI),1978.
[22]Bachmann H,Pretlove A,Raoner H.Vibration prob-lems in structures[M].Basel:Birkhauser Verlag,1955:234.
[23]RFS2-CT-2007-00033Hivoss(human induced vibra-tions of steel structures):design of footbridges guide-line EN03(2007)[S].Germany:Research Found for Coal&Steel,2008.
[2]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.
[3]沈顺高,刘先明,叶继红,等.首都机场四机位机库的动力特性测试及理论分析[J].东南大学学报:自然科学版,2003,33(1):76-78.Shen Shungao,Liu Xianming,Ye Jihong,et al.Test and analysiss of dynamic characteristic of hangar of capital airport[J].Journal of Southeast University:Natural Science Edition,2003,33(1):76-78.(in Chi-nese)
[4]孙广俊,李爱群,黄镇,等.首都机场机库动力特性测试与分析[J].振动、测试与诊断,2010,30(2):158-162.Sun Guangjun,Li Aiqun,Huang Zhen,et al.Test and analysis of dynamic characteristic of AMECO-A380maintenance hangar in beijing capital airport[J].Journal of Vibration,Measurement&Diagnosis,2010,30(2):158-162.(in Chinese)
[5]朱鸣,张志强,柯长华,等.大跨度钢结构楼盖竖向振动舒适度的研究[J].建筑结构,2008,38(1):72-76.Zhu Ming,Zhang Zhiqiang,Ke Changhua,et al.Study on improving people′s comfortableness on large-span steel floor structures[J].Building Structure,2008,38(1):72-76.(in Chinese)
[6]Allen D E,Onysko D M,Murray T M.Minimizing floor vibration ATC design guide1[S].California:Applied Technology Council,1999.
[7]陈宇.步行荷载激励下大跨人行桥的振动研究与减振研究[D].北京:清华大学,2007.
[8]Murray T M,Allen D E,Ungar E E.Floor vibration due to human activity.AISC design guide11[S].Chicago:American Institute of Steel Construction,1997.
[9]Ebrahimpour A,Fitts L L.Measuring coherency of human-induced rhythmic loads using force plates[J].Journal of Structural Engineering,1996,122(7):829-831.
[10]李爱群,张志强,俞剑锋,等.西安北站站房楼盖振动舒适度减振设计与分析报告[R].南京:东南大学土木工程学院,2010.
[11]李爱群,张志强,陈鑫,等.长沙站站房楼盖振动舒适度减振设计与分析报告[R].南京:东南大学土木工程学院,2009.
[12]张志强,马斐,李爱群,等.大跨钢结构楼盖人群荷载响应分析[J].沈阳建筑大学学报,2011,27(3):517-523.Zhang Zhiqiang,Ma Fei,Li Aiqun,et al.Response a-nalysis of large-span steel structure floor Under crowdload[J].Journal of Shenyang Jianzhu University,2011,27(3):517-523.(in Chinese)
[13]叶正强,李爱群,徐幼麟.工程结构粘滞流体阻尼器减振新技术及其应用[J].东南大学学报:自然科学报,2002,32(3):466-473.Ye Zhengqiang,Li Aiqun,Xu Youlin.Fluid viscous damper technology and its engineering application for structural vibration energy dissipation[J].Journal of Southeast University:Natural Science Edition,2002,32(3):466-473.(in Chinese)
[14]焦常科,李爱群,王浩.三塔悬索桥地震响应控制[J].振动、测试与诊断,2011,31(2):156-161.Jiao Changke,Li Aiqun,Wang Hao.Seismic response control for triple-tower suspension bridges[J].Journal of Vibration,Measurement&Diagnosis,2011,31(2):156-161.(in Chinese)
[15]周福霖.工程结构减震控制[M].北京:地震出版社,1997:211.
[16]周星德,明保华.采用半主动TMD的建筑结构振动控制研究[J].振动、测试与诊断,2006,26(2):116-118.Zhou Xingde,Ming Baohua.Research on semi-active TMD of building structure vibration control[J].Jour-nal of Vibration,Measurement&Diagnosis,2006,26(2):116-118.(in Chinese)
[17]李爱群.工程结构减振控制[M].北京:机械工业出版社,2007:239-241.
[18]马斐,张志强,李爱群.大跨高空连廊人群荷载下TMD减振控制分析[J].建筑结构,2011,41(4):1399-1403.Ma Fei,Zhang Zhiqiang,Li Aiqun.Vibration control analysis of large-span corridor under crowd load with TMD[J].Building Structure,2011,41(4):1399-1403.(in Chinese)
[19]Lippert S.Human reactions to vertical vibration[J].Society of Automotive Engineers Journal,1947,55(5):32-34.
[20]BS EN1990Eurocode.Basis of structure design[S].London:British Standards Institution(BSI),2002.
[21]Bs5400British standard specification for loads,steel,concrete and composite bridges,Part2[S].London:British Standards Institution(BSI),1978.
[22]Bachmann H,Pretlove A,Raoner H.Vibration prob-lems in structures[M].Basel:Birkhauser Verlag,1955:234.
[23]RFS2-CT-2007-00033Hivoss(human induced vibra-tions of steel structures):design of footbridges guide-line EN03(2007)[S].Germany:Research Found for Coal&Steel,2008.
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