Scholarlink

<p>Footing connections are critical for concrete-filled steel tubular (CFST) columns to realize their full potential under bending effects in tall buildings and seismic regions. However, current connection designs often rely on thick base plates and many anchor rods, increasing costs. This study aims to investigate the effectiveness of three enhancement techniques (implanted rebars, steel hoops, and vertical stiffeners) in improving the performance of CFST column embedded connections in RC footings under bending moments. An experimental program tested four 160 mm diameter CFST column specimens under quasi-static lateral loads that were prepared, and its results were presented and discussed. Additionally, a finite element model was developed in ANSYS 2023R1 and validated against test results. The model was used to conduct a parametric study evaluating the different enhancement techniques. Rebars of 2%-6% reinforcement ratios were implanted between the RC footing and the concrete core. Steel hoops of 1–4 mm thickness were wrapped around the critical region of the steel tube. The results suggest that the implanted rebars and steel hoops techniques offered promising approaches for improving the connection strength and ductility of CFST columns while maintaining cost-effectiveness.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Enhancing the performance of the embedded concrete-filled steel tubular column-to-footing connection

  • 期刊论文

  • 发表日期：

    2025年3月29日

查看全文
  • Hossam Mostafa,
  • Ghada M. Hekal,
  • Boshra Eltaly

摘要

Footing connections are critical for concrete-filled steel tubular (CFST) columns to realize their full potential under bending effects in tall buildings and seismic regions. However, current connection designs often rely on thick base plates and many anchor rods, increasing costs. This study aims to investigate the effectiveness of three enhancement techniques (implanted rebars, steel hoops, and vertical stiffeners) in improving the performance of CFST column embedded connections in RC footings under bending moments. An experimental program tested four 160 mm diameter CFST column specimens under quasi-static lateral loads that were prepared, and its results were presented and discussed. Additionally, a finite element model was developed in ANSYS 2023R1 and validated against test results. The model was used to conduct a parametric study evaluating the different enhancement techniques. Rebars of 2%-6% reinforcement ratios were implanted between the RC footing and the concrete core. Steel hoops of 1–4 mm thickness were wrapped around the critical region of the steel tube. The results suggest that the implanted rebars and steel hoops techniques offered promising approaches for improving the connection strength and ductility of CFST columns while maintaining cost-effectiveness.