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<p>When bolted connections are used in the wall-column joints of the prefabricated steel frame-composite shear wall system (PSF-CSW structure), connection slip and localized plastic deformation inevitably occur under strong seismic loading, causing the boundary restraint characteristics to deviate from the ideal rigid state. The overall shear walls with such connections form finite boundary restraints, and their system stress mechanisms have not been fully explored. This study is based on the elastic restrained buckling theory and the boundary restraint stiffness theory. Taking the PSF-CSW structure as the research object, the finite restraint imposed by the wall-column on the corrugated steel plate is treated as an elastic rotational boundary. A refined finite element model is established using ABAQUS, which incorporates the connection characteristics of bolted angle connections. The reliability of the model is validated through quasi-static tests, and the failure mode of the PSF-CSW structure is revealed. Furthermore, by integrating the semi-rigid connection theory and the plate buckling theory, the influence of wall-column restraint on the local buckling of the corrugated steel plate and the overall load transfer mechanism is systematically analyzed, starting from the deformation of the structural finite-stiffness boundary under loading and the local buckling of the plate. On this basis, the hysteresis model theory is introduced to reveal the influence of layout parameters on seismic performance. Parametric analyses are conducted to examine the effect of wall-column restraint under different conditions, including with and without wall-column restraint, various axial compression ratios, concrete strengths, and steel strengths. The results show that increasing the axial compression ratio, the addition of wall-column restraint improves structural ductility by 9.2%. Increasing concrete strength leads to an 8.1% increase in peak load and a 16.9% increase in ductility. Increasing steel strength achieves a maximum increase of 20.5% in structural ductility. It is thus demonstrated that wall-column restraint improves the boundary stress conditions of the wall, delays local buckling of the corrugated steel plate, and shifts the structural load transfer mechanism from being dominated by local buckling to a more cooperative global response. The related conclusions provide a theoretical basis for the rational design and optimization of wall-column connections in PSF-CSW structures.</p>

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Seismic Performance of Wall-Column Restraint in Frame-Shear Wall System

  • 期刊论文

  • 发表日期：

    2026年8月3日

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  • Shijie Xu,
  • Zhenyuan Gu,
  • Jieyu Song,
  • Lu Feng,
  • Ying Sun,
  • Wangping Qian

摘要

When bolted connections are used in the wall-column joints of the prefabricated steel frame-composite shear wall system (PSF-CSW structure), connection slip and localized plastic deformation inevitably occur under strong seismic loading, causing the boundary restraint characteristics to deviate from the ideal rigid state. The overall shear walls with such connections form finite boundary restraints, and their system stress mechanisms have not been fully explored. This study is based on the elastic restrained buckling theory and the boundary restraint stiffness theory. Taking the PSF-CSW structure as the research object, the finite restraint imposed by the wall-column on the corrugated steel plate is treated as an elastic rotational boundary. A refined finite element model is established using ABAQUS, which incorporates the connection characteristics of bolted angle connections. The reliability of the model is validated through quasi-static tests, and the failure mode of the PSF-CSW structure is revealed. Furthermore, by integrating the semi-rigid connection theory and the plate buckling theory, the influence of wall-column restraint on the local buckling of the corrugated steel plate and the overall load transfer mechanism is systematically analyzed, starting from the deformation of the structural finite-stiffness boundary under loading and the local buckling of the plate. On this basis, the hysteresis model theory is introduced to reveal the influence of layout parameters on seismic performance. Parametric analyses are conducted to examine the effect of wall-column restraint under different conditions, including with and without wall-column restraint, various axial compression ratios, concrete strengths, and steel strengths. The results show that increasing the axial compression ratio, the addition of wall-column restraint improves structural ductility by 9.2%. Increasing concrete strength leads to an 8.1% increase in peak load and a 16.9% increase in ductility. Increasing steel strength achieves a maximum increase of 20.5% in structural ductility. It is thus demonstrated that wall-column restraint improves the boundary stress conditions of the wall, delays local buckling of the corrugated steel plate, and shifts the structural load transfer mechanism from being dominated by local buckling to a more cooperative global response. The related conclusions provide a theoretical basis for the rational design and optimization of wall-column connections in PSF-CSW structures.