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
Dynamic corner frequency in source spectral model for stochastic synthesis of ground motion
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
摘要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.
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.
基金资助:National Natural Science Foundation of China under grant No. 50778058 and 90715038, National Key Technology Research and Development Program under grant No. 2006BAC13B02
通讯作者:
Xiaodan Sun
E-mail: vshermione@126.com
引用本文:
Xiaodan Sun, Xiaxin Tao, Guoxin Wang, Taojun Liu. Dynamic corner frequency in source spectral model for stochastic synthesis of ground motion[J]. 《地震学报》英文版, 2009, 22(3): 271-276.
Xiaodan Sun, Xiaxin Tao, Guoxin Wang, Taojun Liu. Dynamic corner frequency in source spectral model for stochastic synthesis of ground motion. Earthquake Science, 2009, 22(3): 271-276.