Fibre Reinforced Polymer Columns in Axial Compression

Lei Xie, Yu Bai, Yujun Qi, Colin Caprani, Hao Wang

Research output: Chapter in Book/Report/Conference proceedingChapter (Book)Researchpeer-review


This chapter focuses on the mechanical performance of fibre reinforced polymer (FRP) columns with square hollow sections (SHS) in axial compression. Width-thickness ratio (b/t) is an important geometric parameter for the local buckling of plates and therefore also for such SHS columns. The effects of b/t on the failure modes and load-carrying capacities of pultruded glass fibre reinforced polymer (GFRP) SHS columns are investigated in this chapter. Two SHS with different b/t values of 10.7 and 15.9 respectively are examined under axial compression. Experimental results reveal that local buckling occurs in section B (b/t = 15.9) but not in section A (b/t = 10.7). From a theoretical analysis, a formulation of critical b/t values is established at the boundaries between the failure modes of such GFRP SHS columns under compression, considering the different boundary conditions of the SHS side plates. It is commonly understood that global buckling occurs in columns with higher non-dimensional slenderness λ. This is only true when the width-thickness ratio b/t is less than the derived critical value. Experimental results from this study and previous literature are consistent with the developed theoretical estimations of failure modes and load-carrying capacities for GFRP SHS columns, considering the effects of both non-dimensional slenderness, λ, and width-thickness ratio, b/t.

Original languageEnglish
Title of host publicationComposites for Building Assembly
Subtitle of host publicationConnections, Members and Structures
EditorsYu Bai
Place of PublicationSingapore Singapore
Number of pages22
ISBN (Electronic)9789811942785
ISBN (Print)9789811942778
Publication statusPublished - 2023

Publication series

NameSpringer Tracts in Civil Engineering
ISSN (Print)2366-259X
ISSN (Electronic)2366-2603

Cite this