[1]周继磊,杨迪雄,陈国海.近断层脉冲型地震动功率谱特性分析[J].世界地震工程,2017,33(01):018-26.
 ZHOU Jilei,YANG Dixiong,CHEN Guohai.Characteristic analysis of power spectrum for near-fault impulse type ground motion[J].,2017,33(01):018-26.
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近断层脉冲型地震动功率谱特性分析
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《世界地震工程》[ISSN:/CN:]

卷:
33
期数:
2017年01期
页码:
018-26
栏目:
出版日期:
2017-04-18

文章信息/Info

Title:
Characteristic analysis of power spectrum for near-fault impulse type ground motion
作者:
周继磊1 杨迪雄2 陈国海2
1. 山东理工大学 交通与车辆工程学院, 山东 淄博 255049;
2. 大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 辽宁 大连 116023
Author(s):
ZHOU Jilei1 YANG Dixiong2 CHEN Guohai2
1. School of Traffic and Vehicle Engineering, Shandong University of Technology, Zibo 255049, China;
2. Department of Engineering Mechanics, State Key Laboratory for Structural Analysis of Industrial Equipment, Dalian University of Technology, Dalian 116023, China
关键词:
近断层地震动脉冲型地震动功率谱特性卓越频率谱强度因子
Keywords:
near-fault ground motionimpulse type ground motioncharacteristics of power spectrumdominant frequencyspectral intensity factor
分类号:
P315.9
摘要:
计算分析了近断层脉冲型和无脉冲地震动的功率谱特性。与远场地震动相比,近断层脉冲型地震动的功率谱峰值最大,且在低频处能量集中,符合其长周期分量丰富和幅值大的特点;无脉冲地震动的功率谱峰值次之,对应的卓越频率大于脉冲型地震动功率谱的卓越频率,但仍小于远场地震动功率谱的卓越频率。建立了一种新的功率谱模型以拟合近断层地震动的平均功率谱,并得到了谱强度因子关于震源幅值系数、传播介质衰减系数和震中距的表达式。最后,从新的视角对近断层和远场地震动功率谱卓越频率产生差异的原因进行了诠释。
Abstract:
The power spectral density (PSD) of near-fault impulse type and non-impulse type ground motions were computed and analyzed. Compared with the far-field ground motions, the near-fault impulse type ground motions has the maximum power spectrum peak value and more energy concentration in the low-frequency region, which is consistent with the properties of abundant long-period contents and large amplitudes. Meanwhile, the non-pulse ground motions has the medium power spectrum peak value and its corresponding dominant frequency is greater than that of impulsive one but still less than that of far-field ground motion. Moreover, a new power spectrum model was established to fit the average power spectrum of near-fault ground motions, and the expression of spectral intensity factor with respect to the seismic source amplitude coefficient, the propagation medium attenuation coefficient and epicentral distance was achieved. Finally, the reason for the difference of dominant frequency of power spectrum between near-fault and far-field ground motions was illustrated from a new perspective.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2015-09-22;改回日期:2015-12-13。
基金项目:山东省自然科学基金(2015ZRB019JS);国家自然科学基金项目(51478086,11332004)
作者简介:周继磊(1982-),男,博士研究生,从事结构抗震与可靠度研究.E-mail:zhjl521@163.com
通讯作者:杨迪雄(1970-),男,教授,博士,博导,从事结构抗震与优化研究.E-mail:yangdx@dlut.edu.cn
更新日期/Last Update: 1900-01-01