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On the Interaction of Horizontal and Vertical Motion Observed in the Strong Earthquake Records

Year: 2025

Type: article

Abstract: In the 2018 Hokkaido Eastern Iburi Earthquake (M6.7), seismic intensities as high as 7 and 6+ were observed at KiK-net Oiwake (IBUH01) and K-NET Oiwake (HKD127) stations, respectively. The large acceleration records observed at both stations are discussed based on constant-pressure cyclic direct box shear tests, microscopic studies, and elastoplastic theory. As a result, it was shown that at both observation points, downward vertical acceleration (volume expansion) occurred due to the dilatancy of the surface ground, and that the generated vertical and horizontal motions were strongly coupled.

Source: Journal of Japan Association for Earthquake Engineering

DOI: 10.5610/jaee.25.8_28

Authors: Satoshi MORIO, Yoshinori KATO, Tirawat BOONYATEE

Institutions: National Institute of Technology, Maizuru College, Chulalongkorn University

Language: English

Topic: Seismic Performance and Analysis

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

OpenAlex ID: W4411768439

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Cites: 16

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Related to: 10