全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

近断层地震动和单自由度体系地震反应的分形特征分析

, PP. 45-54

Keywords: 近断层地震动,分形维数,盒维数,SDOF体系地震反应,分形特征

Full-Text   Cite this paper   Add to My Lib

Abstract:

从分形几何的新视角出发,分析近断层地震动的不规则性和复杂性。利用盒维数法计算了来自台湾集集地震和美国北岭地震的30条近断层地震动加速度时程的分形维数。计算结果表明,这些地震动加速度时程具有统计分形特征。近断层地震动运动特征对其分维数影响明显,滑冲效应脉冲地震动的分维数平均值最小,向前方向性效应脉冲地震动的分维数平均值居中,无脉冲地震动的分维数平均值最大,其波形不规则程度也最高。而且,地震动时程的分维数反映了其频谱特性,可作为频谱周期的表征参数。地震动的分维数D与特征周期TC具有较强的负相关关系。最后,对于近断层地震动作用下单自由度(SDOF)体系的弹性和非弹性动力反应时程,应用盒维数法计算了其分形维数,考察了其分形性质。

References

[1]  Somerville P G,Smith N F,Graves R W,etal.Modification of empirical strong ground motion attenuation relations to include the amplitude and duration effects of rupture directivity[J].Seismological Research Letters,1997,68(1):199-222.
[2]  Wang G Q,Zhou X Y,Zhang P Z,etal.Characteristics of amplitude and duration for near fault strong ground motion from the 1999 Chi-Chi,Taiwan,earthquake[J].Soil Dynamics and Earthquake Engineering,2002,22(1):73-96.
[3]  Kalkan E,Kunnath S K.Effects of fling step and forward directivity on seismic response of buildings[J].Earthquake Spectra,2006,22(2):367-390.
[4]  Yang D X,Pan J W,Li G.Interstory drift ratio of building structures subjected to near-fault ground motions based on generalized drift spectral analysis[J].Soil Dynamics and Earthquake Engineering,2010,30(11):1182-1197.
[5]  Turcotte D L.Fractals and chaos in geology and geophysics[M].Cambridge:Cambridge University Press,1997.
[6]  曾锦光,舒雅琴,钟勇.地震记录的分形与混沌性质[J].石油地球物理勘探,1995,30(6):743-748.
[7]  Yang D X,Yang P X,Zhang C G.Chaotic characteristic analysis of strong earthquake ground motions[J].International Journal of Bifurcation and Chaos,2011.(accepted)
[8]  宇露,邹祖军.地震波的分形维研究与应用[J].结构工程师,2008,24(6):85-89.
[9]  钟明寿,龙源,谢全民,等.基于分形盒维数和多重分形的爆破地震波信号分析[J].振动与冲击,2010,29(1):7-11.
[10]  Mandelbrot B B.The fractal geometry of nature[M].New York:W H Freeman and Company,1982.
[11]  Falconer K.Fractal geometry:Mathematical foundations and applications[M].(2nd)Chichester:John Wiley&Sons,2003.
[12]  孙霞,吴自勤,黄?.分形原理及其应用[M].合肥:中国科学技术大学出版社,2003.
[13]  谢和平.分形-岩石力学导论[M].北京:科学出版社,1996.
[14]  朱令人,陈?.地震分形[M].北京:地震出版社,2000.
[15]  Tsonis A A,Elsner JB(eds).Nonlinear dynamics in geosciences[M].New York:Springer,2007.
[16]  Yang D X,Pan J W,Li G.Non-structure-specific intensity measure parameters and characteristic period of near-fault ground motions[J].Earth-quake Engineering and Structural Dynamics,2009,38(11):1257-1280.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133