Evaluation of Surface Fault Displacement in a Real Earthquake With Surface Faulting by High Performance Computing

Sawada, Masataka; Haba, Kazumoto; Hori, Muneo

doi:10.2208/jscejam.74.i_627

Cited by 5 publications

(6 citation statements)

References 9 publications

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“…The slipped sub-fault areas propagate from these contact edges. In the 2014 Nagano-ken-hokubu earthquake simulation [14], the slip on the sub-fault was larger near the surface than near the contact edge with the main fault. The slip distribution on the sub-faults was remarkably different between the two earthquake simulations.…”

Section: Discussionmentioning

confidence: 96%

“…Normal displacements were fixed at the bottom and side boundaries in the initial stress analysis. We assumed a cohesion of 0.025 MPa and friction angle of 25 • on the fault planes by reference to the experimental value of the crushed zone in NPP sites [14]. The ratio between the initial and final shear stiffness κ d /κ 0 was assumed to be 0.01 in reference to the analyses conducted using a simple ground/fault model and a real earthquake ground model [13,14].…”

Section: Analytical Modelmentioning

confidence: 99%

“…We assumed a cohesion of 0.025 MPa and friction angle of 25 • on the fault planes by reference to the experimental value of the crushed zone in NPP sites [14]. The ratio between the initial and final shear stiffness κ d /κ 0 was assumed to be 0.01 in reference to the analyses conducted using a simple ground/fault model and a real earthquake ground model [13,14]. The critical slip u cr was 0.1 m in reference to the value used in the dynamic rupture simulation of the fault [4].…”

Section: Analytical Modelmentioning

confidence: 99%

“…We applied the FEM to the simulation of the 2014 Nagano-ken-hokubu earthquake, where surface faults were observed [14]. The primary fault of this earthquake slipped in the form of a reverse fault, including a left-lateral strike-slip component.…”

Section: Introductionmentioning

confidence: 99%

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Predictive Simulation for Surface Fault Occurrence Using High-Performance Computing

2022

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Numerical simulations based on continuum mechanics are promising methods for the estimation of surface fault displacements. We developed a parallel finite element method program to perform such simulations and applied the program to reproduce the 2016 Kumamoto earthquake, where surface rupture was observed. We constructed an analysis model of the 5 × 5 × 1 km domain, including primary and secondary faults, and inputted the slip distribution of the primary fault, which was obtained through inversion analysis and the elastic theory of dislocation. The simulated slips on the surface were in good agreement with the observations. We then conducted a predictive simulation by inputting the slip distributions of the primary fault, which were determined using a strong ground motion prediction method for an earthquake with a specified source fault. In this simulation, no surface slip was induced in the sub-faults. A large surface slip area must be established near a sub-fault to induce the occurrence of a slip on the surface.

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Section: Discussionmentioning

confidence: 96%

Section: Analytical Modelmentioning

confidence: 99%

Section: Analytical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Predictive Simulation for Surface Fault Occurrence Using High-Performance Computing

2022

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“…We carried out the surface earthquake fault analysis for a high-fidelity model of an underground structure that was designed to reproduce the 2014 Nagano-ken-hokubu earthquake, which had a magnitude of 𝑀 𝑗 = 6.7 or 𝑀 𝑤 = 6.2. 25 As shown in Figure 17A, a 9-km-long surface rupture was observed on the Kamishiro fault, which was recognized and mapped on the Japanese fault map. Additionally, secondary faults, named Secondary faults E, N, and S, were observed.…”

Section: Surface Earthquake Fault Analysismentioning

confidence: 98%

Development of a general‐purpose parallel finite element method for analyzing earthquake engineering problems

Motoyama

Sawada

Hotta

et al. 2021

Earthq Engng Struct Dyn

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A parallel finite element method (FEM) based on high-fidelity models for solving diverse earthquake engineering problems is presented. Its key feature is a parallel solver that is tuned to solve large-scale wave equations. Tensorial material constitutive relations of concrete and soil and sophisticated nonlinear joint elements are implemented to broaden the applicability of the parallel FEM. The performance of the proposed parallel FEM is demonstrated for three examples; namely, seismic response, liquefaction, and surface earthquake fault analyses. A high-fidelity model was constructed for each analysis, and the numerical results were validated against observed data. The performance of the proposed parallel FEM approach was evaluated in terms of the resolution of the simulated results.Ensemble computing based on approximately a hundred high-fidelity models is useful for cases where there are considerable uncertainties regarding the material properties.

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Calculating Surface Rupture With the Elasticity Theory of Dislocation: A Case Study of the Turkey Earthquake

PAN,

KUWATA

2024

Journal of JSCE

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Evaluation of Surface Fault Displacement in a Real Earthquake With Surface Faulting by High Performance Computing

Cited by 5 publications

References 9 publications

Predictive Simulation for Surface Fault Occurrence Using High-Performance Computing

Predictive Simulation for Surface Fault Occurrence Using High-Performance Computing

Development of a general‐purpose parallel finite element method for analyzing earthquake engineering problems

Calculating Surface Rupture With the Elasticity Theory of Dislocation: A Case Study of the Turkey Earthquake

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