Title:
Study on Compression Performance of Thin-Walled Steel Tube-CFRP Composite-Strengthened Brick Column (Prepublished)
Author(s):
Jianchao Wang, Yansong Sun, and Huayu Li
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
axial compressive load capacity; brick column; CFRP; composite reinforcement; thin-walled steel tube
DOI:
10.14359/51750675
Date:
4/15/2026
Abstract:
To address the issue of insufficient load-bearing capacity in brick columns over prolonged use, this paper proposes a novel reinforcement method utilizing thin-walled steel tubes and carbon fiber reinforced polymer (CFRP) sheets. Axial compression tests were performed on 27 specimens, comprising 8 types of reinforced brick columns and 1 unreinforced brick column, to assess the influence of CFRP layer count, steel tube wall thickness, and various reinforcement techniques on structural performance. The findings demonstrate that all reinforcement methods significantly enhanced both the axial load-bearing capacity and ductility compared to the unreinforced brick column. Notably, the composite reinforcement approach, integrating thin-walled steel tubes with CFRP, achieved greater improvements in both capacity and ductility than either reinforcement method applied independently. The axial load-bearing capacity of the reinforced columns increased with the addition of CFRP layers; however, beyond a certain number of layers, the capacity gain became marginal. In contrast, increases in the steel tube wall thickness resulted in more pronounced enhancements in axial load-bearing capacity. Based on these experimental results and established design codes, a formula is proposed for calculating the axial compressive bearing capacity of thin-walled steel tube-CFRP composite reinforced brick columns (TST-CFC).