Matching Target Spectrum Method for Artificial Synthesis of Blast-induced Ground Motion

doi:10.3969/j.issn.1000-1093.2013.08.012

Abstract

Abstract:

To investigate the explosion seismic and vibration isolation in underground protective engineering, a method for an artificial synthesis of blast-induced ground motion by matching the target response spectra is presented. The calculation and processes of the matching target spectrum method are described. In the process of generating non-stationary acceleration time histories in the near or far field, two types of wave functions of blast ground acceleration are adopted to deduce the envelope functions. A procedure for construction of blast-induced ground motion design response spectra is introduced, and a modified function of the design response spectrum is proposed. As an illustration, an induced ground acceleration time history for a shallowly buried engineering is artificially synthesized using the matching-target-spectrum method. The example shows that, after iterative calculation, the adjusted response spectrum can be close to the target response spectrum within the given fitting accuracy, the synthetic blast-induced ground motion time history meets the spectrum design requirements and can reflect the spectral characteristics and non-stationary characteristics of blast-induced ground motion.

Key words: explosion mechanics, blast-induced ground motion time history, artificial synthesis, matching target response spectrum, indirect blast-induced ground motion.

CLC Number:

O383 + . 1

NIAN Xin-zhe, ZHANG Yao, XU Yuan, YAN Dong-jin. Matching Target Spectrum Method for Artificial Synthesis of Blast-induced Ground Motion[J]. Acta Armamentarii, 2013, 34(8): 994-999.

References

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