利用爆炸震源资料获得三分量旋转地震动

赖晓玲; 孙译

doi:10.3799/dqkx.2017.052

Volume 42 Issue 4

Apr. 2017

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Lai Xiaoling, Sun Yi, 2017. Three Component Rotational Ground Motion Obtained from Explosive Source Data. Earth Science, 42(4): 645-651. doi: 10.3799/dqkx.2017.052

Citation:

Lai Xiaoling, Sun Yi, 2017. Three Component Rotational Ground Motion Obtained from Explosive Source Data. Earth Science, 42(4): 645-651. doi: 10.3799/dqkx.2017.052

Lai Xiaoling, Sun Yi, 2017. Three Component Rotational Ground Motion Obtained from Explosive Source Data. Earth Science, 42(4): 645-651. doi: 10.3799/dqkx.2017.052

Citation:

Lai Xiaoling, Sun Yi, 2017. Three Component Rotational Ground Motion Obtained from Explosive Source Data. Earth Science, 42(4): 645-651. doi: 10.3799/dqkx.2017.052

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Three Component Rotational Ground Motion Obtained from Explosive Source Data

doi: 10.3799/dqkx.2017.052

Geophysical Exploration Center, China Earthquake Administration, Zhengzhou 450002, China

Received Date: 2016-11-03
Publish Date: 2017-04-15

Abstract

Abstract

Three component rotational ground motion is one of the most important point of geophysics research. In this paper, the rotational ground motions with three components were deduced by calculation using records of translational seismographs from explosions. The observational data used are from three shots with explosive charge of 500 kg for each and observational distances of 1.8, 2.8, 8.9 km respectively. The rotational motions of the array from these three shots were obtained by calculation. The largest peak angular velocities of ground motion are 41.65, 21.98 and 0.29 μrads/s respectively, which are quite near the results from international colleagues. How the peak values of the ground motion decay with the epicenter distance is always the focal problem in earthquake engineering. In this paper, the peak angular velocities of ground motion are fit with exponent function, and the decay of peak values with distance is obtained. The main features of the decay curves are as follows: The values decay very fast within 1-3 km and slow down gradually beyond 5 km. And with the increase of the distance, the curve tends to more and more flat.
- seismology,
- translational--velocity,
- rotational--velocity,
- seismic array,
- explosive source.

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References(16)

References

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