有节奏运动荷载作用下大跨度钢筋混凝土楼盖竖向振动舒适度分析
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于敬海1,李敬明1,王银平2(1 天津大学建筑设计研究院,天津 300073; 2 天津市团泊湖投资发展有限公司,天津 300074)[摘要]以某学校风雨操场屋顶为研究对象,采用MIDAS/Gen软件进行动力时程分析,研究大跨度钢筋混凝土楼盖在有节奏运动荷载作用下的动力响应特性,分析结构阻尼比、梁高、板厚、附加荷载、荷载分布形式和荷载类型等因素对大跨度钢筋混凝土楼盖结构振动响应的影响。结果表明,增大阻尼比、梁高、板厚和附加荷载,可以减小大跨度钢筋混凝土楼盖的振动响应。[关键词]大跨度钢筋混凝土楼盖;振动舒适度;有节奏运动;频率;加速度中图分类号:TU375.2 文献标识码:A 文章编号:1002-848X(2013)10-0068-03Vibration serviceability analysis on large span RC floor under rhythmic activity loadsYu Jinghai1, Li Jingming1, Wang Yinping2(1 Architectural Design and Research Institute of Tianjin University, Tianjin 300073, China; 2 Tianjin Tuanbo Lake Investment Development Co., Ltd., Tianjin 300074, China)Abstract: Vibration response of the large span RC floor of a school wind and rain playground was studied under the rhythmic activity loads. Dynamic time-historical analysis was carried out by MIDAS/Gen software. The influence of different factors on vibration response of the large span RC floor was studied, such as damping ratio, height of beam, thickness of floor, additional load.The results show that increasing the damping ratio, height of beam, thickness of floor and additional load can reduce the vibration response of the large span RC floor.Keywords: large span RC floor; vibration serviceability; rhythmic activity; frequency; acceleration作者简介:于敬海,博士,研究员,一级注册结构工程师,Email:yjh300072@163.com。参考文献[1]娄宇,黄健,吕佐超.楼盖体系振动舒适度设计[M].北京:科学出版社,2012.[2]折雄雄,陈隽.大跨度楼盖振动舒适度研究综述[J].结构工程师,2009,25(6):144-149.[3]GB 50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2011.[4]JGJ 3—2010高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2011.[5]ALLEN D E, RAINER J H, PERNICA G.Vibration criteria for assembly occupancies [J].Canadian Journal of Civil Engineering,1985, 12(3):617-623.