Synthesis of Strong Ground Motions at Two Rock Stations during the Great Wenchuan Earthquake from a Hybrid Source Model

Tao, Xiaxin; Liu, Hai Ming; Wang, Li Yuan; Jiang, Wei

doi:10.4028/www.scientific.net/amm.353-356.1923

Cited by 3 publications

(4 citation statements)

References 11 publications

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“…1, in the areas with intensity IX and VIII, respectively, during the M8.0 Wenchuan Earthquake, are selected as examples, since strong ground motion was recorded there dur- Figure 11. The mean acceleration response spectra of synthesized and observed motions at (a) Maoxian station (51MXT) and (b) Pixian station (51PXZ), redrawn from Tao et al (2013).…”

Section: Application Of the Regional Parameters To Predict Near-faultmentioning

confidence: 99%

Strong motion PGA prediction for southwestern China from small earthquake records

Tao

Cui

2016

Nat. Hazards Earth Syst. Sci.

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Abstract. For regions without enough strong ground motion records, a seismology-based method is adopted to predict motion PGA (peak ground acceleration) values on rock sites with parameters from small earthquake data, recorded by regional broadband digital monitoring networks. Sichuan and Yunnan regions in southwestern China are selected for this case study. Five regional parameters of source spectrum and attenuation are acquired from a joint inversion by the micro-genetic algorithm. PGAs are predicted for earthquakes with moment magnitude (M w ) 5.0, 6.0, and 7.0 respectively and a series of distances. The result is compared with limited regional strong motion data in the corresponding interval M w ± 0.5. Most of the results ideally pass through the data clusters, except the case of M w 7.0 in the Sichuan region, which shows an obvious slow attenuation due to a lack of observed data from larger earthquakes (M w ≥ 7.0). For further application, the parameters are adopted in strong motion synthesis at two near-fault stations during the great Wenchuan Earthquake M8.0 in 2008.

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Section: Application Of the Regional Parameters To Predict Near-faultmentioning

confidence: 99%

Strong motion PGA prediction for southwestern China from small earthquake records

Tao

Cui

2016

Nat. Hazards Earth Syst. Sci.

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“…In general, 30 source models are used in synthesis to take into account the uncertainty of these parameters, and the mean spectrum is adopted for seismic analysis. A source model was chosen from 30 models by means of the corresponding spectrum mostly close to the average one [8], and it is used in this paper. The rupture process is simulated as the time sequence of ruptures of all sub sources which starts from the initial point (the hypocenter), and propagates with a given velocity to the others.…”

Section: Synthesis Of Near Field Ground Motion From a Large Earthquakementioning

confidence: 99%

“…Some seismologists believe those of large earthquakes are generally stable, while those of small to moderate quakes are different. The source spectrum is adopted for the source mechanism in stochastic synthesis of high frequency ground motion [8]. The value of the stress drop must influence the synthesized motion.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Stress Drop on Synthesized Ground Motion

Tao

Liu

2013

AMM

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The stress drop during a earthquake is deal with by many papers, but has not been estimated very well yet at present. In order to study its influence on synthesized motion, the motions at two rock sites where records were obtained during the Wenchuan earthquake are synthesized by a hybrid source model from two stress drop values, 30 bar and 85 bars respectively. The result shows that the acceleration time histories, response spectra and mean peak values of motions from 85 bar are comparable to the records, but those of motions from 30 bar are much smaller than the records. It means that the way to inverse the regional parameters simultaneously from regional small quake records is acceptable.

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“…Two rock sites are selected for the synthesis, where ground motions were recorded during the great Wenchuan earthquake, with the same regional data set as in [8]. The mean response spectrum and mean peak acceleration are calculated from those of each synthesis by the 30 source models.…”

Section: Stability Of Mean Motions From Synthesis Timesmentioning

confidence: 99%

The Stability of Ground Motions Randomly Synthesized for an Engineering Site

Liu

Tao²,

Wang³

2013

AMM

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The ground motions at two rock stations where motions were recorded during the great Wenchuan earthquae are randomly synthsized for 10 times. The mean response spectrum and mean PGA of each synthesis and the general mean spectrum and PGA after each synthesis are calculated. The result shows the fact that the general mean spectrum after 10 syntheses, and the general mean PGA could be improved just a little. It means that it is not necessary to synthsize ground motion many times for an engineering site in practice, if the mean spectrum and PG are taken from the syntheses by 30 source models.

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Synthesis of Strong Ground Motions at Two Rock Stations during the Great Wenchuan Earthquake from a Hybrid Source Model

Cited by 3 publications

References 11 publications

Strong motion PGA prediction for southwestern China from small earthquake records

Strong motion PGA prediction for southwestern China from small earthquake records

The Influence of Stress Drop on Synthesized Ground Motion

The Stability of Ground Motions Randomly Synthesized for an Engineering Site

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