木结构建筑楼盖结构模态试验及其有限元分析
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摘要
研究了木结构建筑楼盖结构振动特性与建筑舒适度耦合性能,对其开展有限元振动模型计算、模态试验及振型和舒适度分析。结果表明:楼盖结构基频模拟值、单向模态试验值和双向模态试验值均满足楼盖结构不小于15.623 Hz设计要求;楼盖结构经有限元模拟计算的前三阶固有频率中,其基频振型为长度、宽度方向的弯曲振型,第二阶为长度方向的弯曲振型,第三阶为宽度方向的弯曲振型;楼盖结构的双向模态试验的基频呈x向的一阶弯曲振形;二阶固有频率呈x向的二阶弯曲振形。
The coupling characteristics of vibration characteristics and building comfort of wood structure building floor structures were studied. The finite element vibration model calculation, modal test and vibration mode and comfort analysis were carried out. The results showed that the simulated basic frequency value, unidirectional modal test value and the bidirectional modal test values were greater than15.623 Hz, which was required by design, and was consistent with the standard of the comfort of buildings. In the finite element modelling of floor, the fundamental frequency vibration mode was the bending mode of the length and width directions, and the second order was the bending mode of the length direction, the third order were the bending modes of the width direction; The bidirectional mode test of the floor structure had a fundamental frequency, which was a first-order bending mode in the x direction; the second-order natural frequency value was a second-order bending mode in the x direction.
The coupling characteristics of vibration characteristics and building comfort of wood structure building floor structures were studied. The finite element vibration model calculation, modal test and vibration mode and comfort analysis were carried out. The results showed that the simulated basic frequency value, unidirectional modal test value and the bidirectional modal test values were greater than15.623 Hz, which was required by design, and was consistent with the standard of the comfort of buildings. In the finite element modelling of floor, the fundamental frequency vibration mode was the bending mode of the length and width directions, and the second order was the bending mode of the length direction, the third order were the bending modes of the width direction; The bidirectional mode test of the floor structure had a fundamental frequency, which was a first-order bending mode in the x direction; the second-order natural frequency value was a second-order bending mode in the x direction.
引文
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[15]丁叶蔚,卢尧,王正,等.轻型木结构建筑墙体热工性能测试与分析[J].林产工业,2019,46(2):24-29.
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[17]郭颖恺,张颖璐,朱一辛.基于Revit软件及Dynamo可视化编程实现轻型木结构框架体系快速建模[J].林业机械与木工设备,2018,46(8):18-24.
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[19]马婧,徐伟.粽角榫结构优化设计分析[J].家具与室内装饰,2019(3):32-33.
[2]徐兵.预制装配式建筑发展现状及展望[J].住宅与房地产,2017(21):290-291.
[3]中国建筑西南设计研究院有限公司.GBT 51226-2017多高层木结构建筑技术标准[S].北京:中国建筑工业出版社,2017.
[4]曹树谦,张文德,萧龙翔.振动结构模态分析-理论、实验与应用[M].天津:天津大学出版社,2001.
[5]俞启灏.试验模态分析法在建筑机械中的应用[J].北京:北京建筑工程学院学报,2001.
[6]陆春华,金伟良,宋志刚.基于振动舒适度要求的混凝土楼板自振频率分析[J].建筑科学,2010,26(7):43-46.
[7]杜人杰,施卫星,王鹏飞.基于舒适度指标楼盖结构竖向振动分析[J].低温建筑技术,2009,31(11):45-47.
[8]孙敏,李永泽,叶玲.人行荷载下大跨度空心楼盖舒适度分析[J].低温建筑技术,2014,36(8):67-69.
[9]王正,顾玲玲,高子震,等.SPF规格材弹性模量的动态测试及其概率分布[J].林业科学,2015,51(2):106-111.
[10]Wang Z H,Gao Z Z,Wang Y L,et al.A New Dynamic Testing Method for Elastic,Shear Modulus and Poisson's Ratio of Concrete[J].Construction&Building,2015,100(15):129-135.
[11]Dolan J D,Murray T M.Preventing annoying wood floor vibrations[J].Journal of Structural Engineering,1999,125(1),19-24.
[12]YB9238-92钢-混凝土组合楼盖结构设计与施工规程[S].北京:冶金工业出版社,1993.
[13]Ellingwood B,Tallin A.Structural serviceability:floor vibrations[J].Journal of Structural Engineering,1984,110(2),401-418.
[14]中国建筑标准设计研究院有限公司.JGJ99-2015高层民用建筑钢结构技术规程[S].北京:中国建筑工业出版社,2016.
[15]丁叶蔚,卢尧,王正,等.轻型木结构建筑墙体热工性能测试与分析[J].林产工业,2019,46(2):24-29.
[16]刘娜,胡文刚.基于有限元法的家具产品研发周期优化研究[J].林产工业,2018,45(5):18-22.
[17]郭颖恺,张颖璐,朱一辛.基于Revit软件及Dynamo可视化编程实现轻型木结构框架体系快速建模[J].林业机械与木工设备,2018,46(8):18-24.
[18]陈昆仑,张仲凤.免工具拆装家具结构研究[J].家具与室内装饰,2019(3):34-36.
[19]马婧,徐伟.粽角榫结构优化设计分析[J].家具与室内装饰,2019(3):32-33.