Stochastic Finite-Fault Modeling Based on a Dynamic Corner Frequency

Motazedian, Dariush; Atkinson, Gail M.

doi:10.1785/0120030207

Cited by 622 publications

(515 citation statements)

References 55 publications

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“…The general character of the proposed methodology allows for the use of ground-motion records produced by complex seismological models, that account for types of seismic sources, directivity, local-amplification conditions, such as the point-source model SMSIM (Boore 2005), the finite-fault model EXSIM (Motazedian and Atkinson 2005), or hybrid models (Seyhan et al 2013), that combines physics-based and stochastic models for the low and high frequency contents, respectively. Figure 1 illustrates two samples of the ground-motion process A(t) in Eq.…”

Section: Seismic Ground Motionmentioning

confidence: 99%

An earthquake-source-based metric for seismic fragility analysis

Radu

Grigoriu

2018

Bull Earthquake Eng

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The seismic fragility of a system is the probability that the system enters a damage state under seismic ground motions with specified characteristics. Plots of the seismic fragilities with respect to scalar ground motion intensity measures are called fragility curves. Recent studies show that fragility curves may not be satisfactory measures for structural seismic performance, since scalar intensity measures cannot comprehensively characterize site seismicity. The limitations of traditional seismic intensity measures, e.g., peak ground acceleration or pseudo-spectral acceleration, are shown and discussed in detail. A bivariate vector with coordinates moment magnitude m and source-to-site distance r is proposed as an alternative seismic intensity measure. Implicitly, fragility surfaces in the (m, r)-space could be used as graphical representations of seismic fragility. Unlike fragility curves, which are functions of scalar intensity measures, fragility surfaces are characterized by two earthquake-hazard parameters, (m, r). The calculation of fragility surfaces may be computationally expensive for complex systems. Thus, as solutions to this issue, a bi-variate log-normal parametric model and an efficient calculation method, based on stochastic-reduced-order models, for fragility surfaces are proposed.

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Section: Seismic Ground Motionmentioning

confidence: 99%

An earthquake-source-based metric for seismic fragility analysis

Radu

Grigoriu

2018

Bull Earthquake Eng

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“…Although records from significant past earthquakes are sparse in Central Asia, we resorted to ground-motion simulations, following previous studies (e.g., Oth et al, 2010;Stankiewicz et al, 2013). In this work, the stochastic finite-fault simulation program EXSIM (Motazedian, 2005) has been used for generating synthetic ground-motion time series. The software computes the ground acceleration as a function of time at any number of specified locations from a given ▴ Figure 3.…”

Section: Ground-motion Enginementioning

confidence: 99%

Toward a Loss-Driven Earthquake Early Warning and Rapid Response System for Kyrgyzstan (Central Asia)

Pittore

Bindi

Stankiewicz

et al. 2014

Seismological Research Letters

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“…Simulation of SMA using stochastic finite-fault simulation method Due to unavailability of strong motion records for the Sikkim earthquake, ground motions are simulated by an analytical model. The stochastic finite fault approach of Boore (2009) which is an improved version of the methodology proposed by Motazedian and Atkinson (2005) is used to simulate the rock level ground motion for the seven geological regions in India. The theory and application of seismological models for estimating ground motion has been discussed in detail by Boore (1983Boore ( , 2009) and Motazedian and Atkinson (2005).…”

Section: Seismotectonic Setting and Source Of Sikkim Earthquakementioning

confidence: 99%

“…The stochastic finite fault approach of Boore (2009) which is an improved version of the methodology proposed by Motazedian and Atkinson (2005) is used to simulate the rock level ground motion for the seven geological regions in India. The theory and application of seismological models for estimating ground motion has been discussed in detail by Boore (1983Boore ( , 2009) and Motazedian and Atkinson (2005). The application of seismological model for estimating ground motion in northeastern India has been discussed in detail by Raghukanth and Somala (2009) and Raghukanth and Dash (2009).…”

Section: Seismotectonic Setting and Source Of Sikkim Earthquakementioning

confidence: 99%

“…M 0 is the total seismic moment on the fault. To further account for earthquake rupture, Motazedian and Atkinson (2005) introduced the concept of pulsing area where the cumulative number of active subfaults, N Rj increases with time at the initiation of rupture and becomes constant at some fixed percentage of the total rupture area. This parameter determines the number of active subfaults during the rupture of jth subfault.…”

Section: Seismotectonic Setting and Source Of Sikkim Earthquakementioning

confidence: 99%

See 1 more Smart Citation

Estimation of ground motion during the 18th September 2011 Sikkim Earthquake

Raghukanth

Kumari

Kavitha

2012

Geomatics, Natural Hazards and Risk

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This article simulates the ground motion during the devastating 18th September 2011 Sikkim earthquake by analytical approaches. Surface level peak ground acceleration (PGA) values at several stations in the epicentral region have been estimated by the finite fault seismological model. A PGA contour map in the epicentral region is provided. It is found that very near to the epicentre, PGA would have reached more than 0.3g. The SPECFEM3D_GLOBE package which models the complete three-dimensional wave velocity structure and topography is used to simulate the displacement time histories on a global scale. A contour map of peak ground displacement (PGD) and permanent ground residual displacements (PGRD) in the near source region is provided. The estimated ground motions are validated with that obtained from damage values.

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Stochastic Finite-Fault Modeling Based on a Dynamic Corner Frequency

Cited by 622 publications

References 55 publications

An earthquake-source-based metric for seismic fragility analysis

An earthquake-source-based metric for seismic fragility analysis

Toward a Loss-Driven Earthquake Early Warning and Rapid Response System for Kyrgyzstan (Central Asia)

Estimation of ground motion during the 18th September 2011 Sikkim Earthquake

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