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<p>The increasing demand for vertical development in urban areas has led to a surge in high-rise construction, particularly in seismically active regions. These structures are especially vulnerable to earthquake-induced vibrations due to their height and mass distribution. Hybrid seismic control systems, combining Tuned Mass Dampers (TMDs) and Base Isolation (BI), offer promising solutions to enhance structural resilience. However, the influence of TMD placement and the base isolation on different structural systems requires deeper investigation. This study focuses on determining the optimal positions of TMDs within the structure and evaluating their effectiveness using MATLAB-based analysis. Reinforced concrete (RC) and steel high-rise buildings equipped with TMDs at various locations, along with Lead Rubber Bearings (LRBs), are modeled and analysed. A 20-storey G + 19 model is developed in ETABS, and seismic response is assessed using the Response Spectrum Method in accordance with IS 1893 Part 1 and Part 6. Key performance indicators such as top-storey displacement, inter-storey drift, and base shear are examined across configurations. Results reveal that both TMD placement and base isolation significantly affect seismic performance, with hybrid systems achieving up to 65% reduction in critical response parameters. The findings offer practical guidance for optimizing seismic design of RC and steel high-rise buildings.</p>

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Hybrid seismic control of RC and steel high-rise buildings: influence of tuned mass damper placement and base isolation

  • 期刊论文

  • 发表日期：

    2025年8月9日

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  • Shivani D. Pawar,
  • P. B. Salgar

摘要

The increasing demand for vertical development in urban areas has led to a surge in high-rise construction, particularly in seismically active regions. These structures are especially vulnerable to earthquake-induced vibrations due to their height and mass distribution. Hybrid seismic control systems, combining Tuned Mass Dampers (TMDs) and Base Isolation (BI), offer promising solutions to enhance structural resilience. However, the influence of TMD placement and the base isolation on different structural systems requires deeper investigation. This study focuses on determining the optimal positions of TMDs within the structure and evaluating their effectiveness using MATLAB-based analysis. Reinforced concrete (RC) and steel high-rise buildings equipped with TMDs at various locations, along with Lead Rubber Bearings (LRBs), are modeled and analysed. A 20-storey G + 19 model is developed in ETABS, and seismic response is assessed using the Response Spectrum Method in accordance with IS 1893 Part 1 and Part 6. Key performance indicators such as top-storey displacement, inter-storey drift, and base shear are examined across configurations. Results reveal that both TMD placement and base isolation significantly affect seismic performance, with hybrid systems achieving up to 65% reduction in critical response parameters. The findings offer practical guidance for optimizing seismic design of RC and steel high-rise buildings.