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<p>The global expansion of offshore wind turbine (OWT) installations into seismically active regions has heightened concerns about their performance under earthquake loading. Beyond harsh environmental loads, seismic events can severely disrupt OWT operations, potentially resulting in permanent shutdowns. Incorporating soil-structure interaction (SSI) effects significantly influences their resilience and stability—factors that are critical yet poorly understood. Furthermore, the impacts of near-field and far-field ground motions on the seismic SSI behavior of jacket-supported OWTs remain unexplored, representing a critical knowledge gap. Therefore, this study investigates the influence of pulse-like ground motions on the nonlinear dynamic responses of jacket-supported OWT systems, accounting for SSI effects. A high-fidelity numerical model is developed and validated to ensure accuracy within the modeling framework. Following validation, extensive numerical simulations are conducted using earthquake records with and without velocity pulse characteristics. The results elucidate the interplay among pulse-type classifications, SSI effects, and the seismic response of jacket-supported OWTs, thereby supporting improved seismic design and analysis practices for such structures.</p>

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Seismic Soil-Structure Interaction of Jacket-Supported Offshore Wind Turbines Under Near-Field and Far-Field Ground Motions

  • 期刊论文

  • 发表日期：

    2026年5月13日

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  • Md. Rajibul Islam,
  • Dong Van Nguyen,
  • Muhammad Hassaan Farooq Khan,
  • Daeyong Lee

摘要

The global expansion of offshore wind turbine (OWT) installations into seismically active regions has heightened concerns about their performance under earthquake loading. Beyond harsh environmental loads, seismic events can severely disrupt OWT operations, potentially resulting in permanent shutdowns. Incorporating soil-structure interaction (SSI) effects significantly influences their resilience and stability—factors that are critical yet poorly understood. Furthermore, the impacts of near-field and far-field ground motions on the seismic SSI behavior of jacket-supported OWTs remain unexplored, representing a critical knowledge gap. Therefore, this study investigates the influence of pulse-like ground motions on the nonlinear dynamic responses of jacket-supported OWT systems, accounting for SSI effects. A high-fidelity numerical model is developed and validated to ensure accuracy within the modeling framework. Following validation, extensive numerical simulations are conducted using earthquake records with and without velocity pulse characteristics. The results elucidate the interplay among pulse-type classifications, SSI effects, and the seismic response of jacket-supported OWTs, thereby supporting improved seismic design and analysis practices for such structures.