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<p>Various empirical and computational studies have emphasized the efficacy of glass-fibre reinforced polymer (GFRP) cuff components in linking tubular pultruded fibre-reinforced polymer (PFRP) beams and columns. These investigations revealed superior mechanical performance compared with systems that rely solely on PFRPs. This paper’s primary focus is to propose and assess a novel approach for connecting PFRP tubular profiles with a built-in stiffener within the cuff geometry at the beam–column junction. This modification aims to avoid cuff failure at the junction and enhance the stiffness during rotation. This study explores variations in the cuff thickness and beam section length within the cuff to bolster the ultimate load and moment capacities while enhancing adhesive bonding between the cuff and the beam–column connection. Full-scale tests subjected twelve different series of beam–column connections, employing cuffs with diverse geometries, to monotonic loading conditions. Additionally, a finite element model was developed for PFRP box section beams, columns, and cuff sections, employing the Tsai–Wu failure criterion to simulate damage. In bonded connections, the enhanced rotational stiffness is due to the longer and thicker cuff parameters, which increase by up to 92, 73, and 57%, respectively. The experimental validation of these models confirmed their accuracy in depicting frame stiffness and cuff damage patterns when securing PFRP components via GFRP cuff connections of varying thicknesses and lengths.</p>

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Experimental and Finite Element Analyses of Monolithic 3D Cuffs Connected with Pultruded Box Sections

  • 期刊论文

  • 发表日期：

    2025年7月14日

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  • Perumal Kajendran,
  • Pannirselvam Narayanan

摘要

Various empirical and computational studies have emphasized the efficacy of glass-fibre reinforced polymer (GFRP) cuff components in linking tubular pultruded fibre-reinforced polymer (PFRP) beams and columns. These investigations revealed superior mechanical performance compared with systems that rely solely on PFRPs. This paper’s primary focus is to propose and assess a novel approach for connecting PFRP tubular profiles with a built-in stiffener within the cuff geometry at the beam–column junction. This modification aims to avoid cuff failure at the junction and enhance the stiffness during rotation. This study explores variations in the cuff thickness and beam section length within the cuff to bolster the ultimate load and moment capacities while enhancing adhesive bonding between the cuff and the beam–column connection. Full-scale tests subjected twelve different series of beam–column connections, employing cuffs with diverse geometries, to monotonic loading conditions. Additionally, a finite element model was developed for PFRP box section beams, columns, and cuff sections, employing the Tsai–Wu failure criterion to simulate damage. In bonded connections, the enhanced rotational stiffness is due to the longer and thicker cuff parameters, which increase by up to 92, 73, and 57%, respectively. The experimental validation of these models confirmed their accuracy in depicting frame stiffness and cuff damage patterns when securing PFRP components via GFRP cuff connections of varying thicknesses and lengths.