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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

28卷

期数:

2011年04期

页码:

55-62

栏目:

出版日期:

2011-12-20

文章信息/Info

Title:

Research on Response Spectrum CCQC Method Based on Viscous Damping Assumption

作者:

刘庆林¹,傅学怡²,杨先桥³

1. 深圳市建筑工务署,广东 深圳 518031; 2. 深圳大学 土木工程学院,广东 深圳 518060; 3. 中建国际(深圳)设计顾问有限公司,广东 深圳 518048

Author(s):

LIU Qing-lin¹, FU Xue-yi², YANG Xian-qiao³

1. Bureau of Public Works of Shenzhen Municipality, Shenzhen 518031, Guangdong, China; 2. School of Civil Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China; 3. China Construction(Shenzhen)Design International, Shenzhen 518048, Guangdon

关键词:

粘性阻尼;  虚拟激励法;  反应谱CCQC法;  平稳随机振动分析

Keywords:

viscous damping;  pseudo-excitation method;  response spectrum complex complete quadratic combination method;  stationary random vibration analysis

分类号:

TU311.3

DOI:

-

文献标志码:

A

摘要:

采用虚拟激励法推导出基于粘性阻尼假定和任意平稳随机地震动的复振型完全平方组合(CCQC)法原始表达式(OCCQC)及其传统简化表达式TCCQC,并与基于复阻尼假定的平稳随机振动分析结果进行对比。结果表明:高厚比较大的结构TCCQC式计算结果偏小较多,而OCCQC式计算结果更加接近,比TCCQC式要更为合理; 基于粘性阻尼假定时,阻尼矩阵与复模态分析结果之间相互影响,反应谱CCQC法计算结果不惟一,合理性不易被判定; 若粘性阻尼矩阵构造得当,反应谱CCQC法计算结果与基于复阻尼假定的平稳随机振动分析结果接近,但要构造恰当的粘性阻尼矩阵费时费力; 结构设置有粘性阻尼类型机械阻尼器时宜采用基于粘性阻尼假定的反应谱CCQC法,否则采用基于复阻尼假定的反应谱CCQC法更加便捷。

Abstract:

A pseudo-excitation method was used to deduce a new formula of original complex complete quadratic combination(OCCQC)method and its simplified form according to traditionally simplified complex complete quadratic combination(TCCQC). The results of TCCQC were compared with the results of stationary random vibration analysis based on complex damping assumption.The results show that the results of TCCQC of structures which have greater height to thickness ratio are much less, while the calculation results of OCCQC are in good agreement, which shows that OCCQC is more rational than TCCQC. Damping matrix based on viscous damping assumption interacts with results of complex modal analysis, so calculation results of response spectrum CCQC method are not unique and the rationality of results is difficult to be determined.If viscous damping matrix is properly constructed, calculation results of the response spectrum CCQC method based on viscous damping assumption will agree well with that of stationary random vibration analysis based on complex damping assumption, but constructing proper viscous damping matrix is a time-consuming and hard work.The response spectrum CCQC method based on viscous damping assumption is suggested only for structures where viscous damping type mechanical dampers are placed, otherwise the response spectrum CCQC method based on complex damping assumption is more convenient and efficient.

参考文献/References:

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相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2011-09-29
基金项目:国家自然科学基金项目(90715012)
作者简介:刘庆林(1969-),男,湖南衡山人,高级工程师,工学博士,E-mail:liu2xa@vip.163.com。

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更新日期/Last Update: 2011-12-20