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| Dynamic corner frequency in source spectral model for stochastic synthesis of ground motion |
| Xiaodan Sun1, Xiaxin Tao1, 2, Guoxin Wang3, Taojun Liu1 |
1 Department of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
2 Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
3 Department of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China |
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Abstract The static corner frequency and dynamic corner frequency in stochastic synthesis of ground motion from finite-fault modeling are introduced, and conceptual disadvantages of the two are discussed in this paper. Furthermore, the non-uniform radiation of seismic wave on the fault plane, as well as the trend of the larger rupture area, the lower corner frequency, can be described by the source spectral model developed by the authors. A new dynamic corner frequency can be developed directly from the model. The dependence of ground motion on the size of subfault can be eliminated if this source spectral model is adopted in the synthesis. Finally, the approach presented is validated from the comparison between the synthesized and observed ground motions at six rock stations during the Northridge earthquake in 1994.
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Received: 08 January 2009
Published: 10 June 2009
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| Fund:National Natural Science Foundation of China under grant No. 50778058 and 90715038, National Key Technology Research and Development Program under grant No. 2006BAC13B02 |
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Corresponding Authors:
Xiaodan Sun
E-mail: vshermione@126.com
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