scholarly journals Attenuation of Seismic Wave Energy with Strong Motion Records (KiK-net) of the 2016 Kumamoto Earthquake

2020 ◽  
Vol 15 (1) ◽  
pp. 81-89
Author(s):  
Tomohiro ISHIZAWA ◽  
Takaji KOKUSHO ◽  
Hemanta HAZARIKA
Keyword(s):  
Seismic Wave ◽  
Wave Energy ◽  
Strong Motion ◽  
2016 Kumamoto Earthquake ◽  
Strong Motion Records ◽  
Kumamoto Earthquake ◽  
The 2016 Kumamoto Earthquake

Investigation of Damages in Immediate Vicinity of Co-Seismic Faults During the 2016 Kumamoto Earthquake

2017 ◽  
Vol 12 (5) ◽  
pp. 899-915 ◽  
Author(s):  
Shohei Naito ◽  
Ken Xiansheng Hao ◽  
Shigeki Senna ◽  
Takuma Saeki ◽  
Hiromitsu Nakamura ◽  
...  
Keyword(s):  
Fault Zone ◽  
Active Fault ◽  
Strong Motion ◽  
Site Amplification ◽  
Building Damage ◽  
2016 Kumamoto Earthquake ◽  
Severe Damage ◽  
Kumamoto Earthquake ◽  
The 2016 Kumamoto Earthquake ◽  
The Relationship

In the 2016 Kumamoto earthquake, the Futagawa fault zone and the Hinagu fault zone were active in some sections, causing severe damage in neighboring areas along the faults. We conducted a detailed investigation of the surface earthquake fault, building damage, and site amplification of shallow ground within about 1 km of the neighboring areas of the fault. The focus was mainly on Kawayou district, Minamiaso village and Miyazono district, Mashiki town, and locations that suffered particularly severe building damage. We explored the relationship between local strong motion and building damage caused in areas that were in the immediate vicinity of the active fault.

Duration of Strong Motion Exceeding Bridge Design Spectra in the 2016 Kumamoto Earthquake

2017 ◽  
Vol 12 (6) ◽  
pp. 1215-1225
Author(s):  
Nobuoto Nojima ◽  
Taiki Yamamoto ◽  
◽  
Keyword(s):  
Strong Motion ◽  
Response Duration ◽  
2016 Kumamoto Earthquake ◽  
Bridge Design ◽  
Ground Acceleration ◽  
Natural Period ◽  
Distribution Maps ◽  
Kumamoto Earthquake ◽  
Design Spectra ◽  
The 2016 Kumamoto Earthquake

The duration of strong motion exceeding the bridge design spectra in the bridge design specification in Japan is evaluated for the 2016 Kumamoto Earthquake. The structural response duration is defined as the total threshold interval of the velocity response envelope calculated for a viscously damped (5%) single-degree-of-freedom oscillator with various natural period. The prescribed design spectra are employed as frequency-dependent thresholds. The ground acceleration records observed at the K-NET and KiK-net stations during the Kumamoto earthquake are used for the analysis. Spectrum representations of the duration and number of cycles are obtained for four representative ground motion observation stations. The distribution maps of the duration are also presented for the strong motion observation stations in the Kumamoto prefecture.

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