Analytical stress-strain model of hybrid FRP-concrete-steel double skin tubular columns under axial compression. (1st July 2023)

• Record Type: Journal Article
• Authors: Bhat, Pronnoy; Jamatia, Rimen
• Is Part Of: Engineering structures. Volume 286(2023)
• Publication Date: 2023-07-01
• Subjects: Double skin tubular columns -- Analytical model -- FRP-confined concrete -- Multi-axial compression; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2023.116145
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Analytical model for confining pressure exerted by outer FRP and inner steel tube on sandwiched concrete in hybrid FRP-Concrete-Steel Double Skin Tubular Columns (DSTC) under axial compression is proposed. Analysis-oriented model is proposed for predicting the axial stress–strain behavior of DSTC and validated with available experimental data from the literature. Abstract: An analytical model is proposed for confinement pressure exerted by outer fibre-reinforced polymer (FRP) and inner steel tube on sandwiched concrete in hybrid FRP-concrete-steel double skin tubular columns (DSTC) under axial compression assuming displacement compatibility between both FRP-concrete and steel–concrete interfaces. Next, using the proposed analytical model, an analysis-oriented model is presented to predict the uniaxial behavior of hybrid FRP-concrete-steel DSTC. Comparison with available test results from the literature shows that the proposed model provides reasonably good predictions compared to other existing models.