[1]熊仲明,虞子良,魏明兴.大跨预应力混凝土楼盖的双向加速度分布规律及舒适度分析研究[J].西安建筑科技大学学报:自然科学版,2014,46(06):785-790.[doi:10.15986/j.1006-7930.2014.06.004]
　XIONG Zhongming,YU Ziliang,WEI Mingxing.Analysis of the two-way acceleration distribution and comfort of large-span PRC floor[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2014,46(06):785-790.[doi:10.15986/j.1006-7930.2014.06.004]
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大跨预应力混凝土楼盖的双向加速度分布规律及舒适度分析研究()
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西安建筑科技大学学报:自然科学版[ISSN:1006-7930/CN:61-1295/TU]

卷:
46
期数:
2014年06期
页码:
785-790
栏目:
出版日期:
2014-12-31

文章信息/Info

Title:
Analysis of the two-way acceleration distribution and comfort of large-span PRC floor
文章编号:
1006-7930(2014)06-0785-06
作者:
熊仲明1; 虞子良1; 魏明兴2
(1.西安建筑科技大学土木工程学院,陕西 西安 710055;2. 河北建筑设计研究院有限责任公司,河北 石家庄 050011)
Author(s):
XIONG Zhongming1;  YU Ziliang1;  WEI Mingxing2
(1.School of Civil Engineering, Xi’an Univ. of Arch. & Tech., Xi’an 710055 China; 2.Hebei institute of architectural design & research CO.,LTD, Shijiazhuang 050011 China)
关键词:
预应力; 楼盖; 加速度分布; 振动舒适度
Keywords:
prestressed;  floor;  acceleration distribution;  the vibration comfort.
分类号:
TU393
DOI:
10.15986/j.1006-7930.2014.06.004
文献标志码:
A
摘要:
大跨预应力混凝土楼盖刚度低、阻尼小、最小频率接近人走动和跳跃的频率,在人行激励下,很容易不可避免地发生 共振,使人产生不舒适感.本文在总结分析楼盖竖向峰值加速度、各控制点的加速度时程曲线在楼面内双向分布的基础上, 建立了大跨预应力混凝土楼盖整体结构的有限元分析模型,对选定的楼盖方案在三种人行激励工况下的动力响应进行了分析.同时,通过楼盖内加速度分布曲线,对该方案楼盖的舒适度进行了评估.计算结果表明,加速度基本上是关于楼盖的形心轴对称变化,呈抛物线分布;楼盖的初始状态对楼盖振动的峰值加速度有很大影响,可能导致振动初始阶段楼盖峰值加速度加大,为大跨预应力混凝土楼盖结构舒适度的深入研究及减振隔振设计提供了参考.
Abstract:
Large-span PRC floor structure has low rigidity, little damp, and its least frequency is as closer as the frequency of moving and jumping of people on the floor. Induced by human walking, it would be happened to generate resonance easily and inevitably, people would also feel uncomfortable. In this paper, the finite element analysis model of large-span PRC floor structure was built on the basis of summarizing and analyzing the two-way distributions of the floors, vertical peak acceleration and acceleration-time history curve of all control points. The dynamic response of the selected floor-project under three working conditions of incentive were analyzed. At the same time, the comfort level of the floor was assessed through the distribution curve of the vertical peak acceleration in the floor. The calculation results show that the distribution of acceleration is symmetrical about the centroidal axis of floor which may change in uniform in the form of a parabola. The initial state of floor has very big effect on the peak acceleration of floor,s vibration and would strengthen vertical peak acceleration in the initial time. This provides a reference for the deep research of the comfort level of the large-span PRC floor and the design of vibration isolation.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2013-11-08 修改稿日期:2014-12-08
基金项目:国家自然科学基金面上项目(51278395);陕西省教育厅专项基金(12JK0895)
作者简介:熊仲明(1966-),男,教授,博导,主要从事隔震减震控制、共同作用、大跨结构理论及试验研究等.E-mail: 631678230@qq.com
更新日期/Last Update: 2015-09-01