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[1]赵丁凤,陈国兴,陈苏,等.不同刚度地铁地下车站结构振动台试验测试数据的时频特征分析[J].南京工业大学学报(自然科学版),2015,37(04):77-84.[doi:10.3969/j.issn.1671-7627.2015.04.014]
 ZHAO Dingfeng,CHEN Guoxing,CHEN Su,et al.Seismic response characteristics of subway station structures with different stiffnesses based on time-frequency method[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2015,37(04):77-84.[doi:10.3969/j.issn.1671-7627.2015.04.014]
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不同刚度地铁地下车站结构振动台试验测试数据的时频特征分析()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
37
期数:
2015年04期
页码:
77-84
栏目:
出版日期:
2015-07-09

文章信息/Info

Title:
Seismic response characteristics of subway station structures with different stiffnesses based on time-frequency method
文章编号:
1671-7627(2015)04-0077-08
作者:
赵丁凤12陈国兴12陈苏3戚承志4杜修力5
1.南京工业大学 岩土工程研究所,江苏 南京 210009; 2.江苏省土木工程防震技术研究中心,江苏 南京 210009; 3.中国地震局地球物理研究所,北京 100081; 4.北京建筑大学 土木与交通工程学院,北京 100044; 5.北京工业大学 建筑工程学院,北京 100022
Author(s):
ZHAO Dingfeng12CHEN Guoxing12CHEN Su3QI Chengzhi4DU Xiuli5
1.Institute of Geotechnical Engineering,Nanjing Tech University,Nanjing 210009,China; 2.Civil Engineering & Earthquake Disaster Prevention Center of Jiangsu Province,Nanjing 210009,China; 3.Institute of Geophysics,China Earthquake Administration,Beijing 100081,China; 4.Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China; 5.College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100022,China.
关键词:
振动台模型试验 时频累积能量 最优基 整体剪切刚度
Keywords:
shaking table test time-frequency band accumulated energy best wavelet packet transform racking stiffness
分类号:
TU317.1
DOI:
10.3969/j.issn.1671-7627.2015.04.014
文献标志码:
A
摘要:
以模型结构整体剪切刚度量化微粒混凝土和石膏模型结构的刚度比,根据小波包变换的频带分布特征确定频带与结点的输出关系,并基于最小熵准则的最优基选择算法,对比分析了不同刚度三层三跨地铁地下车站侧墙加速度反应的时频特性。研究结果表明:最优小波包变换方法具有自适应的频域分辨能力,能较好地解决频带重叠现象。采用最优基小波包变换技术能有效挖掘出由结构材料不同引起的模型结构加速度反应的时间-频率-能量之间的差异。在强震作用下,微粒混凝土模型结构加速度反应的特征频带总能量高于石膏模型结构; 石膏模型结构加速度反应在0~6.25 Hz频带的能量集中程度高于微粒混凝土模型结构,在>6.25~12.5 Hz频带内的能量累积速率较微粒混凝土模型结构快; 石膏模型结构加速度反应各特征频带进入快速能量累积的时刻均早于微粒混凝土结构。
Abstract:
The stiffness ratio of micro concrete to gypsum model structure was quantified by racking stiffness.According to the relationship between the node the and output frequency band of wavelet packet transform and minimum entropy based algorithms for best selection,the time-frequency characteristics of acceleration responses on sidewalls of different stiffness model structures were compared.The results showed that best wavelet packet transform could posesses recognition ability of frequency domain,it could solve the band overlapping phenomenon well.And it could excavate the difference of acceleration time-response’s frequency-energy distribution between different material models.Under the strong ground motion,special frequency band total energy of different acceleration response of micro concrete model were higher than that of gypsum model. The frequency band of 0-6.25 Hz of acceleration responses of gypsum model structure was more concentrated than those of micro concrete model structure.Frequency band energy accumulation rate of gypsum model structure acceleration responses was faster than that of micro concrete model structure at >6.25-12.5 Hz.The moment when frequency energy accumulated fast of gypsum model structure were earlier than that of concrete structure.

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备注/Memo

备注/Memo:
收稿日期:2014-05-14
基金项目:国家自然科学基金重大项目(91215301); 北京市高等学校创新团队建设与教师职业发展计划(IDHT20130512); 江苏省普通高校研究生科研创新计划(CXZZ12_0426)
作者简介:赵丁凤(1989—),女,上海人,博士生,主要研究方向为城市地下结构抗震; 陈国兴(联系人),教授,E-mail:gxc6307@163.com.
引用本文:赵丁凤,陈国兴,陈苏,等.不同刚度地铁地下车站结构振动台试验测试数据的时频特征分析[J].南京工业大学学报:自然科学版,2015,37(4):77-84..
更新日期/Last Update: 2015-07-08