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All Journal Sumatra Journal of Disaster, Geography and Geography Education Civil Engineering Journal
Yusuke Ono, Yusuke
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Civil Engineering, Building, Construction & Architecture Education

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Mesh-free Particle Method for Simulation of Earthquake-induced Slope Failure Ono, Yusuke
Sumatra Journal of Disaster, Geography and Geography Education Vol 1 No 2 (2017): Sumatra Journal of Disaster, Geography and Geography Education Volume 1 Number 2
Publisher : Sumatra Journal of Disaster, Geography and Geography Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1050.118 KB) | DOI: 10.24036/sjdgge.v1i2.84

Abstract

The Smoothed Particle Hydrodynamics (SPH) method for simulation of earthquake induced slope failure is presented. The SPH method was first invented for simulating dynamic behavior of compressive viscous fluid in the late 1970s and has been applied to other various problems in engineering field. So far the SPH method has been extended to handle not only fluid dynamics but also solid dynamics. The most advantage of the SPH method compared to other well established numerical method, such as the Finite Element Method, the Finite Discrete Method et al., is feasibility of analyzing discontinuity problem. This feature of the SPH method is desirable to earthquake induced slope failure simulation because slope failure phenomena posses discontinuity inherently. In this paper, the SPH method is adapted to simulate the earthquake induced slope failure. The SPH method can describe full dynamic behavior of a slope excited by earthquake and possible to predict the final configuration of slope after failure.
Seismic Performance Assessment of Sustainable Shelter Building Using Microtremor Method Putra, Rusnardi Rahmat; Kiyono, Junji; Ono, Yusuke; Saputra, Dezy
Civil Engineering Journal Vol 10, No 11 (2024): November
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2024-010-11-06

Abstract

The increasing intensity of earthquakes in West Sumatra could trigger megathrust earthquakes and tsunamis at the inter-plate in the Mentawai Islands. Building assessments are necessary to determine their vulnerability to predicted earthquakes. The target is a four-story building that serves as an education building and vertical evacuation. This research proposes a complete vulnerability assessment method using single microtremor observations, and the results are used to determine seismic building performance. The natural frequency is derived from the spectral analysis of the horizontal components (NS and EW) for each level, and we considered the largest earthquake peak ground motion (PGA) in this region to be the September 30, 2009, Padang earthquake (PGA 380 gals as ground motion input). We calculated the resonance index, seismic vulnerability index, and damping ratio. The results show that the resonance index of the structure is less than 1, the vulnerability index of the UNP Faculty of Economics building ɤ > (1/100-1/200) and is 1/234 to 1/699 for the x direction and 1/207 to 1/709 for the y direction; the average damping ratio is <5% for both directions (x, y) and RDM and FSR relationship is 0.78 and 0.69 for x and y respectively. The overall findings indicate that the structural response of the evaluated buildings falls within the 'slight' damage category during seismic events. Doi: 10.28991/CEJ-2024-010-11-06 Full Text: PDF
Co-Authors Kiyono, Junji Putra, Rusnardi Rahmat Saputra, Dezy