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Purpose <p>The occurrence of severe earthquakes exerts significant influence on adjacent buildings, causing them to collide with each other. Such collisions exacerbate the vulnerability of the building structure to seismic events and often result in severe damage to the structure. Furthermore, the occurrence of power outages in buildings due to seismic activity poses potential hindrances to effective evacuation. In this paper, two kinds of electromagnetic resonator are installed in adjacent building structures. These two resonators can not only enhance seismic performance, but also facilitate energy collection, so as to provide short-term power supply to the building. In this way, they can significantly reduce the risk of structures colliding with each other and improve the overall earthquake resistance.</p> Method <p>To study and improve vibration control performance, a unified dynamic model including electromagnetic resonator is established, and the design parameters are optimized by H2 optimization method and Monte Carlo pattern search method. Time domain analysis was also used to verify the vibration reduction capabilities of the two resonators.</p> Result <p>The results show that the installation of electromagnetic resonator (EMR) can significantly reduce the risk of collision of adjacent building structures, improve its seismic resistance, and enhance the robustness and stability of the system with strong energy harvesting capability. In detail, In the single-storey building simulation, the average value of peak displacement damping ratio is 68.1% at the lowest and can reach up to 73.71% at the highest. While in the multi-storey building simulation, the average value of peak displacement damping rate is 61.58% at the lowest and 63.86% at the highest. It is enough to see that the damping effect of the two models proposed in this paper is significant. As for the energy harvesting effect, during the Taft seismic simulation, the maximum power output of the system within adjacent buildings peaked at 2442.44&#xa0;kW, while the average power absorbed remained significantly high at 354.20&#xa0;kW. Additionally, in the Lander earthquake simulation, the average absorbed power is even as high as 627.29&#xa0;kW.</p> Conclusion <p>Research shows that EMR-1 and EMR-2 vibration control systems significantly improve the seismic performance and energy recovery capacity of adjacent building structures by optimizing the mass ratio and stiffness ratio, and EMR-2 has better performance in damping effect and energy conversion efficiency, showing wider applicability and stability.</p>

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Simultaneous Vibration Control and Energy Harvesting of Adjacent Building Structures Based on Electromagnetic Resonators

  • 期刊论文

  • 发表日期：

    2025年1月21日

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  • Xiaofang Kang,
  • Xinyue Zhu,
  • Xianzeng Shi,
  • Jianjun Tang

摘要

Purpose

The occurrence of severe earthquakes exerts significant influence on adjacent buildings, causing them to collide with each other. Such collisions exacerbate the vulnerability of the building structure to seismic events and often result in severe damage to the structure. Furthermore, the occurrence of power outages in buildings due to seismic activity poses potential hindrances to effective evacuation. In this paper, two kinds of electromagnetic resonator are installed in adjacent building structures. These two resonators can not only enhance seismic performance, but also facilitate energy collection, so as to provide short-term power supply to the building. In this way, they can significantly reduce the risk of structures colliding with each other and improve the overall earthquake resistance.

Method

To study and improve vibration control performance, a unified dynamic model including electromagnetic resonator is established, and the design parameters are optimized by H2 optimization method and Monte Carlo pattern search method. Time domain analysis was also used to verify the vibration reduction capabilities of the two resonators.

Result

The results show that the installation of electromagnetic resonator (EMR) can significantly reduce the risk of collision of adjacent building structures, improve its seismic resistance, and enhance the robustness and stability of the system with strong energy harvesting capability. In detail, In the single-storey building simulation, the average value of peak displacement damping ratio is 68.1% at the lowest and can reach up to 73.71% at the highest. While in the multi-storey building simulation, the average value of peak displacement damping rate is 61.58% at the lowest and 63.86% at the highest. It is enough to see that the damping effect of the two models proposed in this paper is significant. As for the energy harvesting effect, during the Taft seismic simulation, the maximum power output of the system within adjacent buildings peaked at 2442.44 kW, while the average power absorbed remained significantly high at 354.20 kW. Additionally, in the Lander earthquake simulation, the average absorbed power is even as high as 627.29 kW.

Conclusion

Research shows that EMR-1 and EMR-2 vibration control systems significantly improve the seismic performance and energy recovery capacity of adjacent building structures by optimizing the mass ratio and stiffness ratio, and EMR-2 has better performance in damping effect and energy conversion efficiency, showing wider applicability and stability.