Static Bearing Capacity Analysis of CFRP-Reinforced Short CHS Steel Tubular Columns under Axial Compression

SHAO Yongbo; ZHU Hongmei; YANG Dongping

doi:10.3969/j.issn.0258-2724.20180527

Volume 55 Issue 1

Jan. 2020

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Journal of Southwest Jiaotong University > 2020 > 55(1): 167-174.

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SHAO Yongbo, ZHU Hongmei, YANG Dongping. Static Bearing Capacity Analysis of CFRP-Reinforced Short CHS Steel Tubular Columns under Axial Compression[J]. Journal of Southwest Jiaotong University, 2020, 55(1): 167-174. doi: 10.3969/j.issn.0258-2724.20180527

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Static Bearing Capacity Analysis of CFRP-Reinforced Short CHS Steel Tubular Columns under Axial Compression

doi: 10.3969/j.issn.0258-2724.20180527

Received Date: 25 Jun 2018
Rev Recd Date: 30 Nov 2018

Available Online: 11 Jan 2019

Publish Date: 01 Feb 2020

Abstract

Abstract

To predict the ultimate strength of a short circular hollow section (CHS) steel tubular columns reinforced with carbon fibre-reinforced polymer (CFRP), both theoretical and numerical analyses were carried out. In the theoretical analysis, based on equivalent section method, the equations for calculating the load bearing capacities of CHS steel tubular columns under axial compression are deduced, which correspond to two different reinforcing methods, in which CFRPs are arranged in circumferential placement and in longitudinal-circumferential placement. In the numerical analysis, both eigenvalue buckling method and Riks method are combined to build a nonlinear finite element model of the tubular columns under axial compression. The finite element analysis for the stress distribution of the longitudinal and circumferential CFRPs shows that the circumferential CFRPs are under tension and restrain the radial deformation of the tubular columns, while the longitudinal CFRPs share the axial compression and restrain the deformation of the tubular columns. The comparison of the numerical results, theoretical results and reported experimental results show that the maximum deviation among them is no more than 2%, which verifies the finite element model and deduced equations.
- CFRP reinforced CHS tubular columns,
- axial compression,
- static bearing capacity,
- equivalent section method,
- finite element analysis

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Static Bearing Capacity Analysis of CFRP-Reinforced Short CHS Steel Tubular Columns under Axial Compression

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Static Bearing Capacity Analysis of CFRP-Reinforced Short CHS Steel Tubular Columns under Axial Compression

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