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<p>This study experimentally investigates the cyclic behavior of semi-rigid beam-to-column angle connections using carbon steel (SS275), austenitic stainless steel (STS316), and low-yield-point steel (HSA80), to quantify the influence of material properties on structural performance. Six specimens, including top-and-seat (C-TS) and top-and-seat with double web angle (C-TSDW) configurations, were tested under cyclic loading. Material tests showed that STS316 has approximately 10% lower elastic modulus and 27% lower yield stress than SS275, but higher ductility (1.54 times) and strain-hardening capacity (1.70 times). Despite this, the STS316 connections exhibited only a 16% reduction in yield moment, with comparable moment resistance at large deformations (moment ratios of 0.96 and 1.04 at 0.02&#xa0;rad and 0.04&#xa0;rad, respectively) and similar energy dissipation capacity at 0.04&#xa0;rad. The HSA80 connections showed higher initial stiffness and strength primarily due to increased angle thickness, along with stable inelastic behavior. The C-TSDW configuration exhibited 20–25% higher energy dissipation and improved ductility compared to the C-TS configuration. These results indicate that connection-level performance is governed more by connection configuration and deformation capacity than by material yield stress alone.</p>

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Experimental Study on Hysteretic Behaviors of Semi-Rigid Beam-Column Connections with Angle Cleats of Different Steel Grade

  • 期刊论文

  • 发表日期：

    2026年7月18日

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  • SangHo Yun,
  • YongHo Lee,
  • SeungHun Kim,
  • TaeSoo Kim

摘要

This study experimentally investigates the cyclic behavior of semi-rigid beam-to-column angle connections using carbon steel (SS275), austenitic stainless steel (STS316), and low-yield-point steel (HSA80), to quantify the influence of material properties on structural performance. Six specimens, including top-and-seat (C-TS) and top-and-seat with double web angle (C-TSDW) configurations, were tested under cyclic loading. Material tests showed that STS316 has approximately 10% lower elastic modulus and 27% lower yield stress than SS275, but higher ductility (1.54 times) and strain-hardening capacity (1.70 times). Despite this, the STS316 connections exhibited only a 16% reduction in yield moment, with comparable moment resistance at large deformations (moment ratios of 0.96 and 1.04 at 0.02 rad and 0.04 rad, respectively) and similar energy dissipation capacity at 0.04 rad. The HSA80 connections showed higher initial stiffness and strength primarily due to increased angle thickness, along with stable inelastic behavior. The C-TSDW configuration exhibited 20–25% higher energy dissipation and improved ductility compared to the C-TS configuration. These results indicate that connection-level performance is governed more by connection configuration and deformation capacity than by material yield stress alone.