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<p>A novel precast concrete (PC) shear wall system connected to steel columns with friction bearing devices (FBDs) was recently proposed and experimentally validated, owning excellent ductility and sufficient energy dissipation capacity. However, almost no researches have been conducted to model the behaviors of the novel PC shear wall system. This paper presents a simulation technique developed with OpenSees models and validated against experimental results. The numerical model demonstrates good accuracy in predicting load-bearing capacity, cumulative energy dissipation, and FBD behavior, with a maximum error in peak load of no more than 7.9% compared to experimental results. Parametric analyses further investigated the effects of key variables, including the axial load ratio, column-to-wall stiffness ratio, bolt slot length, friction force threshold, and number of FBDs, on the seismic performance of the novel PC shear walls. Increasing the axial load ratio significantly enhances the peak load and intensifies the pinching effect of hysteresis curves, while its impact on cumulative energy dissipation and initial stiffness is negligible. It also delays the locking displacement of FBDs. Raising the stiffness ratio improves the peak load and initial stiffness but has limited influence on energy dissipation and damping. Extending the slot length of FBDs markedly delays the locking displacement and enhances energy dissipation capacity, whereas its effect on peak load and initial stiffness is minimal. Increasing the friction threshold of FBDs substantially improves energy dissipation performance but offers only modest gains in peak bearing capacity, with initial stiffness showing notable improvement only at lower threshold levels. Employing more FBDs comprehensively enhances the structural bearing capacity, energy dissipation, and stiffness. Notably, across all parametric variations, the locking displacement of FBDs remains consistent and is unaffected by changes in the stiffness ratio, friction threshold, or the number of FBDs. Collectively, these findings offer a systematic parametric foundation for the performance-based design of such new structural systems.</p>

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Seismic response of precast concrete shear walls connected to steel columns with friction bearing devices: a comprehensive numerical study

  • 期刊论文

  • 发表日期：

    2026年3月8日

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  • Qiang Fang,
  • Jian Sun,
  • Hongxing Qiu,
  • Hongbo Jiang,
  • Bruno Dal Lago

摘要

A novel precast concrete (PC) shear wall system connected to steel columns with friction bearing devices (FBDs) was recently proposed and experimentally validated, owning excellent ductility and sufficient energy dissipation capacity. However, almost no researches have been conducted to model the behaviors of the novel PC shear wall system. This paper presents a simulation technique developed with OpenSees models and validated against experimental results. The numerical model demonstrates good accuracy in predicting load-bearing capacity, cumulative energy dissipation, and FBD behavior, with a maximum error in peak load of no more than 7.9% compared to experimental results. Parametric analyses further investigated the effects of key variables, including the axial load ratio, column-to-wall stiffness ratio, bolt slot length, friction force threshold, and number of FBDs, on the seismic performance of the novel PC shear walls. Increasing the axial load ratio significantly enhances the peak load and intensifies the pinching effect of hysteresis curves, while its impact on cumulative energy dissipation and initial stiffness is negligible. It also delays the locking displacement of FBDs. Raising the stiffness ratio improves the peak load and initial stiffness but has limited influence on energy dissipation and damping. Extending the slot length of FBDs markedly delays the locking displacement and enhances energy dissipation capacity, whereas its effect on peak load and initial stiffness is minimal. Increasing the friction threshold of FBDs substantially improves energy dissipation performance but offers only modest gains in peak bearing capacity, with initial stiffness showing notable improvement only at lower threshold levels. Employing more FBDs comprehensively enhances the structural bearing capacity, energy dissipation, and stiffness. Notably, across all parametric variations, the locking displacement of FBDs remains consistent and is unaffected by changes in the stiffness ratio, friction threshold, or the number of FBDs. Collectively, these findings offer a systematic parametric foundation for the performance-based design of such new structural systems.