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<p>This paper introduces an advanced inerter-based isolation system for broadband vibration control in base-isolated structures. The rising occurrence of unpredictable dynamic loads poses significant risks to structural integrity and safety. Passive control devices, known for their simplicity and reliability, are increasingly favored over active and semi-active systems. This study examines a flexible base-isolated structure equipped with curved surface sliders (CSS) and clutched inerter dampers (CID) under bi-directional seismic excitation. The governing equations of motion are derived, incorporating frequency-dependent and correlation coefficients into stochastic simulations. A frequency-dependent modal combination rule is applied to capture the dynamic response accurately. Performance analysis focuses on a multi-story shear-type structure, with optimal inertance values of the CID identified to minimize superstructure acceleration. Fast Fourier Transform (FFT) analyses validate the system’s efficacy. Results demonstrate that structures with CSS and CID achieve significant reductions in displacement and peak floor accelerations under bi-directional seismic loads. In conclusion, the proposed inerter-based isolation system effectively enhances seismic resilience, offering a robust solution for vibration control in base-isolated structures. These findings contribute valuable insights to structural engineering and support the development of safer, more resilient infrastructure in seismic-prone regions.</p>

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Enhanced Seismic Resilience of Base-Isolated Structures Using Curved Surface Sliders and Clutched Inerter Dampers under Bi-Directional Excitation

  • 期刊论文

  • 发表日期：

    2025年2月24日

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  • K. K. Kiran,
  • D. T. Naveenkumar

摘要

This paper introduces an advanced inerter-based isolation system for broadband vibration control in base-isolated structures. The rising occurrence of unpredictable dynamic loads poses significant risks to structural integrity and safety. Passive control devices, known for their simplicity and reliability, are increasingly favored over active and semi-active systems. This study examines a flexible base-isolated structure equipped with curved surface sliders (CSS) and clutched inerter dampers (CID) under bi-directional seismic excitation. The governing equations of motion are derived, incorporating frequency-dependent and correlation coefficients into stochastic simulations. A frequency-dependent modal combination rule is applied to capture the dynamic response accurately. Performance analysis focuses on a multi-story shear-type structure, with optimal inertance values of the CID identified to minimize superstructure acceleration. Fast Fourier Transform (FFT) analyses validate the system’s efficacy. Results demonstrate that structures with CSS and CID achieve significant reductions in displacement and peak floor accelerations under bi-directional seismic loads. In conclusion, the proposed inerter-based isolation system effectively enhances seismic resilience, offering a robust solution for vibration control in base-isolated structures. These findings contribute valuable insights to structural engineering and support the development of safer, more resilient infrastructure in seismic-prone regions.