Far-field analysis of effects of unilateral rupturing fault on the space correlation of strong ground motion
On the assumption that seismic source is simplified as linear rupture fault with finite length, this paper qualitatively studies the seismic source effects on space correlation of strong ground motion. Based on expanding expression of Fourier spectrum of strong ground motion with space coordinate variables, this paper also gives a expression of describing correlation of strong ground motion field. According to far-field condition, the theoretical formula of the expression can be obtained. Furthermore, this paper presents a theoretical formula of estimation the radius of strong ground motion field, which depends on expansion condition of Fourier spectrum of strong ground motion, with space coordinate variables. At last, taking one earthquake as an example, this paper gives three-dimension patterns of radius of the field with epicenter distance and azimuth as well as frequency.
Key wordsone-direction rupture fault strong ground motion space correlation far-field
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- Abrahamson. 1992. Generation of spatially incoherent strong motion time history [A]. Tenth World Conference on Earthquake Engineering. Madrid, Spain. 845–850.Google Scholar
- FENG Qi-min, HU Yu-xian. 1981. Spatial correlation model of ground motion [J]. Earthquake Engineering and Engineering Vibration, 1(2): 1–8 (in Chinese).Google Scholar
- LI Xiao-jun, ZHAO Feng-xin, HU Yu-xian. 1997. Research on simulative seismic motion field with spatial correlation. Acta Seismologica Sinica, 10(2): 267–271.Google Scholar
- JIN Xing. 1992. Studies on Design Earthquake Ground Motion and Ground Motion Field for Important Engineering Sites [D]: [Ph.D Thesis]. Harbin: Institute of Engineering Mechanics, China Seismological Bureau, 111–114 (in Chinese).Google Scholar
- JIN Xing, CHEN Chao, ZHANG Ming-yu. 1999. Quantitative research on effects of seismic source on space correlation of strong ground motion [J]. Earthquake Engineering and Engineering Vibration, 20(1): 1–10 (in Chinese).Google Scholar
- JIN Xing, LIAO Zhen-peng. 1994. Physical simulation on the random field of seismic motion [J]. Earthquake Engineering and Engineering Vibration, 14(3): 11–19 (in Chinese).Google Scholar
- Katayama T, Yamazaki F, Nagata S, et al. 1990. A strong motion database for the chiba seismometer array and its engineering analysis [J]. E E S D, 19: 1 089–1 106Google Scholar
- SHI Zhen-liang, ZHANG Shao-quan, ZHAO Rong-guo, et al. 1992. Handbook of Earthquake Work [M]. Beijing: Seismological Press, 237 (in Chinese).Google Scholar
- Yamazaki Y, Turke T. 1992. Spatial variation study on earthquake ground motion observed by the chiba array [A]. Tenth World Conference on Earthquake Engineering. Madrid, Spain. 651–656.Google Scholar