强地震动随机合成中震源谱模型的改进

陶夏新; 陈 富; 孙晓丹

强地震动随机合成中震源谱模型的改进 English Version

陶夏新^1,2,
陈富¹,
孙晓丹^3,1

1. 哈尔滨工业大学土木工程学院，黑龙江哈尔滨 150090; 2. 中国地震局工程力学研究所，黑龙江哈尔滨 150080; 3. 西南交通大学土木工程学院，四川成都 610031

基金项目: 国家自然科学基金项目(90715038 ； 50778058)；国家国际科技合作项目(2011DFA21460)；国家重点基础研究发展计划(973)项目(2010CB736103)；桥梁结构抗震技术交通行业重点实验室开放基金项目(200802)

详细信息

作者简介:
陶夏新 (1949 – ) ，男，河南新野人，博士，教授，博士生导师，主要从事工程地震、岩土工程防灾及环境振动等方面的研究与教学工作。

中图分类号: TU435
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出版历程
- 收稿日期: 2011-07-30
- 发布日期: 2012-03-29

Improvement of source spectrum model for synthesis of strong ground motion

1. School of Civil Engineering, Harbin Institute of Technology, Harbin150090, China; 2. Institute of Engineering Mechanics, CEA, Harbin150080, China; 3. School of Civil Engineering, South-Western Jiaotong University, Chengdu 610031, China

摘要

摘要: 为了消除合成的地震动幅值对子源尺寸的依赖，全面介绍了地震动随机合成中震源谱模型的一个改进，突出凹凸体对高频地震波的控制作用，拐角频率与子源错动量相关，且随着破裂的发展、破裂的子源数目逐渐增加有所降低。同时，提出在震源谱模型中增加标度因子补偿震源谱参数随破裂面扩展变化引起的能量损失的方法，通过算例说明了远场总辐射能随子源尺寸的变化明显减小。
- 强地震动 /
- 随机合成 /
- 震源谱模型 /
- 拐角频率
Abstract: A source spectrum model for stochastic synthesis of strong ground motion is introduced in order to eliminate the dependence of the motion on the size of sub-source. In the model, the domination of asperity on high-frequency motion is emphasized. The corner frequency is related with the slip of sub-source and decreases with the rupturing, i.e., number of ruptured sun-sources. Furthermore, an approach is presented to add a scaling factor into the source spectrum model to counterbalance the energy loss from the change of source spectrum parameters with the spreading of rupture area. By means of this approach, an obvious decrease of variation of the total radiated energy at far field is demonstrated by a case study .
- strong ground motion /
- stochastic synthesis /
- source spectral model /
- dynamic corner frequency

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参考文献(12)

[1]	ATKINSON G, BOORE D. Stochastic point-source modeling of ground motion in the Cascadia region[J]. Seismological Research Letter, 1997, 68 (1): 74 – 85.
[2]	BERESNEV I, ATKINSON G. Stochastic finite-fault modeling of ground motions from the 1994 Northridge, California, earthquake, I. Validation on rock sites[J]. Bulletin of the Seismological Society of America, 1998, 88 (6): 1392 – 1401.
[3]	ATKINSON G, SILVA W. Stochastic modeling of California ground motions[J]. Bulletin of the Seismological Society of America, 2000, 90 (2): 255 – 274.
[4]	BERESNEV I, ATKINSON G. Finsim-a fortran program for simulating stochastic acceleration time histories from finite faults[J]. Seismological Research Letters, 1998, 69 (1): 27 – 32.
[5]	MOTANZEDIAN D, ATKINSON G. Stochastic finite-fault modeling based on a dynamic corner frequency[J]. Bulletin of the Seismological Society of America, 2005, 95 (3): 995 – 1010.
[6]	TAO X, SUN X, WANG G. A dynamic corner frequency based source spectral model[C] // Proc of the 14 World Conference on Earthquake Engineering, Beijing, 2008.
[7]	SUN X, TAO X, CHEN F. Improvements of corner frequency and scaling factor for stochastic finite-fault modeling[J]. Earthquake Engineering & Engineering Vibration, 2010, 9 (4): 1 – 9.
[8]	MASUDA T. Scaling relations for source parameters of micro-earthquakes in the northeastern part of Japan[D]. Tohoku: Tohoku University, 1982.
[9]	王海云 . 近场地震动预测的有限断层震源模型 [D]. 哈尔滨 : 中国地震局工程力学研究所 , 2004. ( WANG Hai-yun. Finite fault source model for predicting near-field strong ground motion[D]. Harbin: Institute of Engineering Mechanics, CEA, 2004. (in Chinese))
[10]	王国新 . 强地震动衰减研究 [D]. 哈尔滨 : 中国地震局工程力学研究所 , 2001. (WANG Guo-xin. On strong ground motion attenuation[D]. Harbin: Institute of Engineering Mechanics, CEA, 2001. in Chinese))
[11]	孙晓丹 . 强地震动场估计中若干问题的研究 [D]. 哈尔滨 : 哈尔滨工业大学 , 2010. (SUN Xiao-dan. Some issues on estimation of strong ground motion field [D]. Harbin: Harbin Institute of Technology, 2010. (in Chinese))
[12]	TAO X, ANDERSON J. Near field strong ground motion simulation[C]// Proc of ICANCEER, Keynote, 2002(1): 79 – 86.

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强地震动随机合成中震源谱模型的改进 English Version

作者简介: 陶夏新 (1949 – ) ，男，河南新野人，博士，教授，博士生导师，主要从事工程地震、岩土工程防灾及环境振动等方面的研究与教学工作。

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出版历程

Improvement of source spectrum model for synthesis of strong ground motion

计量

出版历程

目录

作者简介:
陶夏新 (1949 – ) ，男，河南新野人，博士，教授，博士生导师，主要从事工程地震、岩土工程防灾及环境振动等方面的研究与教学工作。