[1]ZHONG Jufang,CHEN Gong.Analysis of Influencing Factors of Ground Motion Coherence Function Along Depth Direction[J].Journal of Seismological Research,2020,43(04):720-731.
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Analysis of Influencing Factors of Ground Motion Coherence Function Along Depth Direction
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
43
Number of periods:
2020 04
Page number:
720-731
Column:
Public date:
2020-09-17
- Title:
- Analysis of Influencing Factors of Ground Motion Coherence Function Along Depth Direction
- CLC:
- P315.914
- DOI:
- -
- Abstract:
- Based on the data of several stations in KiK-net strong-motion seismograph network,we discussed the influence of magnitude,epicenter distance,site classification,and the height difference between the surface and the underground measuring points on the coherence function of ground motion along the depth.The results showed that:① The variation law of coherency functions in two horizontal components with the frequency was similar,but the difference of coherency functions between vertical and horizontal components was significant.The coherency function decreased with the increasing of frequency and height difference,and the attenuation speed of coherency function in vertical component in the class Ⅲ site was faster than that of both the classⅠand classⅡ site with the increasing of the frequency.② The coherence function value of near-field(R≤300 km)is greater than that of far-field(R>300 km).The influence of magnitude on coherency function was not significant.The coherences of ground motion were different in different site,and different coherence function models should be used in different site types.We suggested that the coherence of ground motion in class Ⅲ site can be reflected by the function model of Wang Zhaozhao,and that in classⅠand Ⅱ sites can be reflected by the Harichandran function model.③ Based on the data of Japan “3·11” earthquake,we fit the parameters of the coherence function model in epicenter distance range.
- References:
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Last Update:
2020-09-17