The sequence of seismic events (SSE) plays a crucial role in influencing the behaviour of soil slopes. The 2023 Turkey-Syria earthquake sequence (Mw 7.8 and 7.5) led to widespread infrastructural damage and slope failures, highlighting the need for further study of slope response under such conditions. Thus, the present study investigates the seismic response of an infinite slope subjected to 10 sets of recorded sequences of the Turkey earthquake using finite difference-based commercial software FLAC2D. The dynamic response of soil is modelled by combining the Mohr-Coulomb constitutive relationship with the Hardin hysteretic damping. The results show that the SSE leads to incremental damage, measured by the incremental displacement ratio, representing the percentage change in displacement between the SSE and single-event scenarios. Further, this study considers peak and cumulative characteristics of the ground motion to understand the slope response. It was found that Root Square Velocity ( \({v}_{rs})\) , Peak Grond Velocity (PGV), and Peak Ground Acceleration (PGA) are effective as they are highly correlated with the slope displacement. The findings contribute to a better understanding of slope behavior and the identification of effective intensity measures under SSE conditions.

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Response of a Sloped Ground Subjected to Sequence of Seismic Events

  • N. Jayasri,
  • Ashutosh Kumar,
  • Maheshreddy Gade

摘要

The sequence of seismic events (SSE) plays a crucial role in influencing the behaviour of soil slopes. The 2023 Turkey-Syria earthquake sequence (Mw 7.8 and 7.5) led to widespread infrastructural damage and slope failures, highlighting the need for further study of slope response under such conditions. Thus, the present study investigates the seismic response of an infinite slope subjected to 10 sets of recorded sequences of the Turkey earthquake using finite difference-based commercial software FLAC2D. The dynamic response of soil is modelled by combining the Mohr-Coulomb constitutive relationship with the Hardin hysteretic damping. The results show that the SSE leads to incremental damage, measured by the incremental displacement ratio, representing the percentage change in displacement between the SSE and single-event scenarios. Further, this study considers peak and cumulative characteristics of the ground motion to understand the slope response. It was found that Root Square Velocity ( \({v}_{rs})\) , Peak Grond Velocity (PGV), and Peak Ground Acceleration (PGA) are effective as they are highly correlated with the slope displacement. The findings contribute to a better understanding of slope behavior and the identification of effective intensity measures under SSE conditions.