|本期目录/Table of Contents|

[1]陈隽,赵冠宇,祁晓煜,等.场地土动力特性识别方法对比[J].建筑科学与工程学报,2009,26(02):32.
 CHEN Jun,ZHAO Guan-yu,QI Xiao-yu,et al.Comparison of Soil Dynamic Property Identification Method[J].Journal of Architecture and Civil Engineering,2009,26(02):32.
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
26卷
期数:
2009年02期
页码:
32
栏目:
出版日期:
2009-06-20

文章信息/Info

Title:
Comparison of Soil Dynamic Property Identification Method
作者:
陈隽1,赵冠宇2,祁晓煜2,史晓军2
1.同济大学土木工程防灾国家重点实验室,上海200092;2.同济大学建筑工程系,上海200092
Author(s):
CHEN Jun1, ZHAO Guan-yu2, QI Xiao-yu2, SHI Xiao-jun2
1. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China; 2. Department of Building Engineering, Tongji University, Shanghai 200092, China
关键词:
场地土动力特性 振动台试验 随机子空间迭代 经验模式分解 频域分解方法
Keywords:
soil dynamic property shaking table test stochastic subspace iteration empirical mode decomposition frequency domain decomposition method
分类号:
TU411.8
DOI:
-
文献标志码:
A
摘要:
结合自由场地土振动台试验,对比了随机子空间迭代(SSI)方法、经验模式分解结合希尔伯特变换(EMD+HT)方法和频域分解(FDD)方法识别场地土卓越频率、阻尼比的适用性,以及不同激励类型、不同土层深度和大阻尼比情况对识别精度的影响。结果表明:对于随机激励,当阻尼比较小时,上述3种方法均能准确识别出场地土卓越频率; 而大震时土体卓越频率、阻尼比与振动过程耦合,此时经验模式分解结合希尔伯特变换方法可以给出合理的识别结果。
Abstract:
Combining free soil shaking table test, the predominant frequency of silty clay and its damping ratio used in series of shaking table test were identified by three commonly used methods, i.e. the stochastic subspace identification(SSI)method, frequency domain decomposition(FDD)method and empirical mode decomposition plus Hilbert transform(EMD+HT)method. The applicabilities of the three methods were verified and identification results were discussed in items of effect of input type, different soil depths and selection of calculating parameters concerning large damping ratio cases. The results show that the three methods are applicable for random excitation and small damping ratio cases; only empirical mode decomposition plus Hilbert transform method can produce reasonable results when soil predominant frequency and damping ratios are coupled with vibration process or subjected to strong earthquake.

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备注/Memo

备注/Memo:
收稿日期:2009-03-02
基金项目:国家自然科学基金创新研究群体科学基金项目(50621062/E0805); 土木工程防灾国家重点实验室基础研究项目(SLDRCE08-C-03)
作者简介:陈 隽(1972-),男,湖南茶陵人,副教授,工学博士,E-mail:cejchen@tongji.edu.cn。
更新日期/Last Update: 2009-06-20