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<p>Self-centering cross-laminated timber (CLT) shear walls with replaceable energy dissipation devices have emerged as promising seismic-resistant structural systems. This study investigated the cyclic behavior of CLT coupled shear walls that incorporate an O-shaped flexural plate (OFP) as an energy dissipation device. Two full-scale CLT samples, PT-23 (without OFP) and PH-23 (with OFP), were tested under quasistatic cyclic loading. A finite element (FE) model was developed to validate the experimental results and examine key structural parameters. The results show that PH-23 exhibited enhanced energy dissipation and self-centering behavior, which effectively delayed stiffness degradation. The OFP distributed prestress forces, which reduced residual deformation, but its failure led to a sharp decline in energy dissipation. The results of the numerical simulations closely match the experimental results, confirming the model’s accuracy. A parametric study identified 40–70 kN as the optimal prestress force range for maximizing the lateral resistance and energy dissipation. This study confirms the feasibility of using replaceable OFP dampers in CLT shear walls to improve seismic resilience. The findings provide guidance for optimizing prestress levels and postearthquake repairability in timber structures. Future research should explore long-term performance and real-world applications.</p>

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Seismic Performance of Self-Resetting Cross-Laminated Timber (CLT) Double-Wall Shear Walls with Replaceable Coupling Beams and Mild Steel Dampers

  • 期刊论文

  • 发表日期：

    2025年4月18日

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  • Yong Xu,
  • Wei Wang,
  • Yingda Zhang,
  • Ben Ma,
  • Yunsa Ma,
  • Zijian Liu,
  • Zihao Liu

摘要

Self-centering cross-laminated timber (CLT) shear walls with replaceable energy dissipation devices have emerged as promising seismic-resistant structural systems. This study investigated the cyclic behavior of CLT coupled shear walls that incorporate an O-shaped flexural plate (OFP) as an energy dissipation device. Two full-scale CLT samples, PT-23 (without OFP) and PH-23 (with OFP), were tested under quasistatic cyclic loading. A finite element (FE) model was developed to validate the experimental results and examine key structural parameters. The results show that PH-23 exhibited enhanced energy dissipation and self-centering behavior, which effectively delayed stiffness degradation. The OFP distributed prestress forces, which reduced residual deformation, but its failure led to a sharp decline in energy dissipation. The results of the numerical simulations closely match the experimental results, confirming the model’s accuracy. A parametric study identified 40–70 kN as the optimal prestress force range for maximizing the lateral resistance and energy dissipation. This study confirms the feasibility of using replaceable OFP dampers in CLT shear walls to improve seismic resilience. The findings provide guidance for optimizing prestress levels and postearthquake repairability in timber structures. Future research should explore long-term performance and real-world applications.