南太湖奥体公园体育场屋盖观光走廊人行舒适度研究
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丁菲1,赵阳1,杨学林2,周平槐2,林寅1(1 浙江大学空间结构研究中心,杭州 310058; 2 浙江省建筑设计研究院,杭州 310006)[摘要]南太湖湿地奥体公园体育场屋盖钢结构与下部钢筋混凝土看台完全脱开,最大悬挑长度为45m,屋盖悬挑端设置观光走廊。以结构动力学理论为基础,通过数值模拟方法,对结构施加同步行走、随机行走、同步起立、单人跳跃等32种不同的人行激励,验算人行激励下观光走廊的振动舒适性。重点研究了人行激励下的结构动力时程响应,计算出每种工况的峰值加速度,并与选取的舒适度评价标准限值对比,找出不满足舒适度标准的工况和相应的振动最大位置,为减振设计提供依据。结果表明通过调整结构刚度和结构振动控制均能实现较好的减振效果。[关键词]大跨度结构; 人行激励; 振动舒适度; 同步行走; 随机行走; 同步起立; 单人跳跃; 减振中图分类号:TU 311.3,TU 352.12文献标识码:A文章编号:1002-848X(2012)08-0008-04Vibration serviceability of sightseeing gallery in the steel roof of stadium in Nantai Lake-Olympic Wetland Park under human-induced excitationDing Fei1, Zhao Yang1, Yang Xuelin2, Zhou Pinghuai2, Lin Yin1(1 Space Structures Research Center, Zhejiang University, Hangzhou 310058, China;2 Zhejiang Province Institute of Architectural Design and Research, Hangzhou 310006, China)Abstract: The roof of the stadium in Nantai Lake Olympic Wetlands Park in Huzhou is completely separated from the stand, whose maximum cantilever extend as long as 45m. The sightseeing gallery is sited at the cantilever ends. Based on the structural dynamics theory, the numerical method was used to evaluate the vibration serviceability of the structure, which was imposed by 32 excitations including harmonic walking, random walking, synchronous standing up and a single person jumping. The peak accelerations obtained from time-history dynamic analyses are compared with the limited accelerations of the adopted standard. The conditions and corresponding locations are found out, and then the stiffness adjustment method and vibration control measures are used to reduce the structure vibration.Keywords: long span structure; human-induced excitation; vibration serviceability; vibration reduction通讯作者:赵阳,教授,博导,Email:ceyzhao@zju.edu.cn。参考文献[1]杨学林,赵阳,周平槐,等. 南太湖湿地奥体公园体育场屋盖钢结构设计[J]. 建筑结构, 2012,42(8):1-7.[2]深圳大学土木工程学院.深圳湾体育中心展望桥舒适度分析报告[R]. 深圳:深圳大学,2009.[3]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:自然科学版,2004,32(8):996-999.[4]余志生.汽车理论[M].3版.北京:机械工业出版社,2000:170-171.[5]ATC Design Guide 1. Minimizing Floor Vibration[S]. 1999.[6]操礼林,李爱群,陈鑫,等.人群荷载下大型火车站房大跨楼盖振动舒适度控制研究[J].土木工程学报,2010,43(增刊):334-340.[7]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.[8]BRE Digest 426. The response of structures to dynamic crowd load[S]. 1997.[9]GRUNDMANN H, KREUZINGER H, SCHNEIDER M. Dynamic calculations of footbridges[J]. Bauingenieur, 1993,68 (in German).[10]MATSUMOTO Y, NISHIOKA T, SHIOJIRI H, et al. Dynamic design of footbridges[C]. IABSE Proceedings, No. P-17/78, 1978.