[1]王春林,吕志涛.基于地震动特性的悬挂减振结构性能[J].东南大学学报(自然科学版),2012,42(4):719-723.[doi:10.3969/j.issn.1001-0505.2012.04.027]
 Wang Chunlin,Lü Zhitao.Performance of vibration-controlling suspended-floor structures based on characteristics of earthquake motions[J].Journal of Southeast University (Natural Science Edition),2012,42(4):719-723.[doi:10.3969/j.issn.1001-0505.2012.04.027]
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基于地震动特性的悬挂减振结构性能()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
42
期数:
2012年第4期
页码:
719-723
栏目:
土木工程
出版日期:
2012-07-20

文章信息/Info

Title:
Performance of vibration-controlling suspended-floor structures based on characteristics of earthquake motions
作者:
王春林 吕志涛
东南大学混凝土及预应力混凝土结构教育部重点实验室,南京 210096
Author(s):
Wang Chunlin Lü Zhitao
Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University, Nanjing 210096, China
关键词:
高层建筑 悬挂结构 振动控制 近断层 阻尼器
Keywords:
tall buildings suspended-floor structures vibration control near fault damper
分类号:
TU973.19
DOI:
10.3969/j.issn.1001-0505.2012.04.027
摘要:
分析了一栋已建悬挂建筑在不同地震动输入下的结构响应规律.首先,根据其特点,建立了相应的数值分析模型.其次,在3组远断层地震波和3组近断层地震波输入下,分析了地震动特性对悬挂结构减振效果的影响; 最后,给出了阻尼器分布对减振效果的影响.分析结果表明:在远断层和近断层地震波作用下,存在最优的阻尼系数使得筒体的动力响应最小.虽然地震波频谱特性不同,但优化得到的最优阻尼系数差别不大.在近断层地震波作用下,主结构的动力响应较大,且减振效果相对较差.阻尼器连接悬挂楼面和主结构筒体时,能够较好地约束悬挂楼面的层间位移和相对于筒体的位移.近断层地震波作用下悬挂楼面的层间位移和相对于筒体位移比远断层地震波作用下大得多.当阻尼器的总量一定时,按三角形或悬挂楼面的基本振型布置阻尼器比均匀分布能取得更好的减振效果,且能够更好地抑制悬挂楼面的位移.
Abstract:
The influence of the earthquake motions on the responses of the suspended-floor building are evaluated. First, based on the structural features, its numerical model was built. Secondly, time history analyses were employed to evaluate the effect of characteristics of earthquake motions on the controlling results of the suspended-floor structures under near-fault and far-fault earthquakes. Finally, the influence of the locations of the dampers was addressed. Numerical results show that the optimum damping coefficient of dampers can be obtained to minimize dynamic responses of the core-tube under near-fault and far-fault earthquakes and the optimum values are nearly identical in spite of the different features of earthquake motions. Moreover, under near-fault earthquakes, dynamic responses of the core-tube are relatively large but the vibration-controlling effect is small. The relative displacement of suspended floors to the core-tube and the story drift of suspended floors can be well constrained when the dampers are used to link the suspended floor with the core-tube. However, the relative displacements of suspended floors under near-fault earthquakes are larger than those under far-fault earthquakes. If the total quantity of dampers is given, the triangle or basic-mode distribution patterns of dampers are better than the uniform distribution pattern, the former would be beneficial to better controlling effect and decrease relative displacements of suspended floors.

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相似文献/References:

[1]刘先觉,鲍家声,蔡冠丽.高层建筑若干问题[J].东南大学学报(自然科学版),1978,8(3):93.[doi:10.3969/j.issn.1001-0505.1978.03.006]
 [J].Journal of Southeast University (Natural Science Edition),1978,8(4):93.[doi:10.3969/j.issn.1001-0505.1978.03.006]
[2]王春林,吕志涛.核筒悬挂结构的动力特性及参数优化[J].东南大学学报(自然科学版),2007,37(2):181.[doi:10.3969/j.issn.1001-0505.2007.02.001]
 Wang Chunlin,Lü Zhitao.Dynamic behavior and parameter optimization of core-tube suspension structures[J].Journal of Southeast University (Natural Science Edition),2007,37(4):181.[doi:10.3969/j.issn.1001-0505.2007.02.001]

备注/Memo

备注/Memo:
作者简介: 王春林(1980—),男,博士,讲师,chunlin@seu.edu.cn.
基金项目: 国家重点基础研究发展计划(973计划)资助项目(2007CB714200)、国家自然科学基金资助项目(51008077).
引文格式: 王春林,吕志涛.基于地震动特性的悬挂减振结构性能[J].东南大学学报:自然科学版,2012,42(4):719-723. [doi:10.3969/j.issn.1001-0505.2012.04.027]
更新日期/Last Update: 2012-07-20