[1]LU Zhicheng,WEN Weiping,LI Sheng,et al.Study on the Characteristics of Structural Ductility Factor for Mainshock-Aftershock Sequences Considering the Effect of Near-Fault Pulse-Like Features[J].Journal of Seismological Research,2019,42(04):601-607.
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Study on the Characteristics of Structural Ductility Factor for Mainshock-Aftershock Sequences Considering the Effect of Near-Fault Pulse-Like Features
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
42
Number of periods:
2019 04
Page number:
601-607
Column:
Public date:
2019-12-15
- Title:
- Study on the Characteristics of Structural Ductility Factor for Mainshock-Aftershock Sequences Considering the Effect of Near-Fault Pulse-Like Features
- CLC:
- P315.91
- DOI:
- -
- Abstract:
- Many earthquakes have shown that mainshock-aftershock(MSAS)sequences would include the near-field fault pulse-like records,and pulse-like records would further increase the danger of earthquake sequences.This paper analyzes the ductility factor for near-field fault pulse-like MSAS ground motions.The revised randomization method is used to generate lots of near-fault pulse-like MSAS ground motions,and then normalizing the period to decrease the dispersion of ductility factor.The mean ductility factor and the effects of aftershocks are finally analyzed.The results indicate that period normalization can decrease the dispersion of results with the maximum level of 60%.However,the strong aftershock would decrease the advantage of period normalization.In the short period region,ductility factor decreased sharply with the increase of period,until the minimum value reached around the normalized period of 1.0 s.The equal displacement rule can be observed when the period normalization is used.The effects of strong aftershocks on the ductility factor can exceed 20% and reach 30%,and aftershocks have larger effects on the ductility factor for un-degrading systems than that for degrading systems.
- References:
- -
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Last Update:
2019-12-15