Offshore ground motion characteristics on the horizontal PGA, spectral acceleration, frequency content and significant duration from the 2021 Mw 7.1 and 2022 Mw 7.4 …

J Tan, J Hu - Soil Dynamics and Earthquake Engineering, 2023 - Elsevier
The two large offshore earthquakes that occurred in Japan's eastern Fukushima region on
February 13, 2021, Mw 7.1 and March 17, 2022, Mw 7.4 are the two largest offshore …

Influence of seawater depth on offshore ground motion characteristics and seismic responses of sea-crossing cable-stayed bridges

B Chen, B Wang, Z Ma, Y Du, C Li - Ocean Engineering, 2023 - Elsevier
This paper studies the effect of seawater depth on offshore earthquake motion
characteristics and seismic response of bridges. By analyzing the offshore seismic data …

Nonlinear earthquake response of marine sediments with distributed acoustic sensing

L Viens, LF Bonilla, ZJ Spica, K Nishida… - Geophysical …, 2022 - Wiley Online Library
Soft sediment layers can significantly amplify seismic waves from earthquakes. Large
dynamic strains can trigger a nonlinear response of shallow soils with low strength, which is …

Influence of site factors on offshore ground motions: observed results and numerical simulation

B Chen, D Wang, S Chen, S Hu - Soil Dynamics and Earthquake …, 2021 - Elsevier
More offshore structures such as sea-crossing bridges, undersea tunnels, and subsea
pipelines are being constructed than ever. Owing to the lack of offshore strong motion …

Study on the seismic characteristics of piers considering site conditions and hydrodynamic effect

B Chen, J Gong, H Huang, W Hu, S Hu, X Peng - Ocean Engineering, 2024 - Elsevier
Sea-crossing bridges face complex site environments compared to onshore bridges, with
the marine environment significantly influencing seismic responses. Despite this, current …

New GMPEs for the Sagami Bay region in Japan for moderate magnitude events with emphasis on differences on site amplifications at the Seafloor and land seismic …

J Hu, J Tan, JX Zhao - Bulletin of the Seismological …, 2020 - pubs.geoscienceworld.org
Ground‐motion prediction equations (GMPEs) for the horizontal and vertical spectral
accelerations (SAs) from the offshore area off the Sagami Bay is presented in this article. To …

Nonlinear seismic site response classification using K-means clustering algorithm: Case study of the September 6, 2018 Mw6. 6 Hokkaido Iburi-Tobu earthquake …

K Ji, R Wen, Y Ren, YP Dhakal - Soil Dynamics and Earthquake …, 2020 - Elsevier
Spectral ratio methods have been widely used in evaluation of nonlinear seismic site
response. Nevertheless, it remains inefficient and subjective to identify stations with …

A prediction model for vertical-to-horizontal spectral ratios of ground motions on the seafloor for moderate magnitude events for the Sagami Bay region in Japan

J Tan, J Hu - Journal of Seismology, 2021 - Springer
A prediction model for offshore vertical-to-horizontal (V/H) spectral ratios of peak ground
acceleration (PGA) and 5%-damped elastic response spectra for periods ranging from 0.01 …

Damping modification factors for horizontal and vertical acceleration spectra from offshore ground motions in the Japan Sagami Bay region

J Hu, M Liu, J Tan - Bulletin of the Seismological Society …, 2022 - pubs.geoscienceworld.org
Damping modification factors (DMFs) are used to scale the 5%‐damped response spectra
for the seismic design of structures with different damping ratios. However, there is no DMF …

Estimation of source, path, and site factors of S waves recorded at the S-net sites in the Japan Trench area using the spectral inversion technique

YP Dhakal, T Kunugi, H Yamanaka, A Wakai… - Earth, Planets and …, 2023 - Springer
S-net is a large-scale ocean bottom (OB) network in the Japan Trench area, consisting of
inline-type 150 observatories equipped with seismometers and pressure gauges. Among …