TY - JOUR
T1 - Analytical model for circular F-STC stub columns under concentric compression
AU - Xu, Tianxiang
AU - Guo, Ying
AU - Liu, Jiepeng
AU - Chen, Y. Frank
N1 - Funding Information:
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The authors gratefully acknowledge the financial support provided by the National Natural Science Foundation of China under Grant number U20A20312.
Publisher Copyright:
© The Author(s) 2022.
PY - 2022/6
Y1 - 2022/6
N2 - The fiber reinforced polymer (FRP)-steel composite tubed (F-STC) column is characterized by high strength and deformability as well as the tube corrosion resistance provided by the FRP. This study aims to find a suitable analytical model for F-STC columns, based on the existing analytical models for confined concrete columns where each typically consists of the stress–strain relationship of actively confined concrete, a lateral strain equation, and the confining stress. A database of 66 tests (61 reported plus 5 added) is established and used to examine the existing analytical models. However, existing models fail to predict the initial stiffness of F-STC columns with lower diameter-to-thickness ratio of steel tube and the correct development of tube stresses. To this end, an incoordination coefficient of axial strains is proposed to account for the different axial strains between the steel tube and concrete. Lastly, after a close examination on the existing analytical models, a modified Teng’s model is proposed. The results predicted by the proposed analytical model generally match well with the test results of F-STC columns.
AB - The fiber reinforced polymer (FRP)-steel composite tubed (F-STC) column is characterized by high strength and deformability as well as the tube corrosion resistance provided by the FRP. This study aims to find a suitable analytical model for F-STC columns, based on the existing analytical models for confined concrete columns where each typically consists of the stress–strain relationship of actively confined concrete, a lateral strain equation, and the confining stress. A database of 66 tests (61 reported plus 5 added) is established and used to examine the existing analytical models. However, existing models fail to predict the initial stiffness of F-STC columns with lower diameter-to-thickness ratio of steel tube and the correct development of tube stresses. To this end, an incoordination coefficient of axial strains is proposed to account for the different axial strains between the steel tube and concrete. Lastly, after a close examination on the existing analytical models, a modified Teng’s model is proposed. The results predicted by the proposed analytical model generally match well with the test results of F-STC columns.
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U2 - 10.1177/13694332221075850
DO - 10.1177/13694332221075850
M3 - Article
AN - SCOPUS:85127234075
SN - 1369-4332
VL - 25
SP - 1792
EP - 1805
JO - Advances in Structural Engineering
JF - Advances in Structural Engineering
IS - 8
ER -