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<p>In this study, failure modes in RC frame structures were refined as the complete beam plastic hinge failure, complete column plastic hinge failure, partial beam plastic hinge failure, and partial column plastic hinge failure modes. The corresponding control equations were established. Experimental research and finite element analyses were conducted to analyze the failure modes of RC frame structures. For the RC frame specimens with the complete beam plastic hinge failure mode, the ratios of the curvatures to its ultimate value of beam ends were on average 112.4% greater than those of the column ends. After modifying the RC frame models based on the control equations, the maximum curvature ductility coefficients of the beam increased by approximately 23%, and those of the column decreased slightly. The occurrence probability of the plastic hinges of the beam was about 180% higher than that of the column. The proposed control equations could effectively predict and regulate the failure mode of RC frame structures.</p>

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Failure Mode Control for Reinforced Concrete Frame Structures Based on Beam-Column Stiffness Ratio

  • 期刊论文

  • 发表日期：

    2025年9月22日

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  • Yudong Ma,
  • Ruiqing Zhou,
  • Boquan Liu,
  • Qian Xia

摘要

In this study, failure modes in RC frame structures were refined as the complete beam plastic hinge failure, complete column plastic hinge failure, partial beam plastic hinge failure, and partial column plastic hinge failure modes. The corresponding control equations were established. Experimental research and finite element analyses were conducted to analyze the failure modes of RC frame structures. For the RC frame specimens with the complete beam plastic hinge failure mode, the ratios of the curvatures to its ultimate value of beam ends were on average 112.4% greater than those of the column ends. After modifying the RC frame models based on the control equations, the maximum curvature ductility coefficients of the beam increased by approximately 23%, and those of the column decreased slightly. The occurrence probability of the plastic hinges of the beam was about 180% higher than that of the column. The proposed control equations could effectively predict and regulate the failure mode of RC frame structures.