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- Title
Behavior of High Strength Concrete Filled Square Steel Tube Stub Columns with Inner CFRP Tube Under Biaxial Eccentric Compression.
- Authors
Zhijian Yang; Guochang Li; Yan Lang; Zengmei Qiu
- Abstract
This paper studies the contribution of CFRP (carbon fiber-reinforced polymer) to the mechanical behavior of high strength concrete-filled square steel tube (HCFST) under biaxial eccentric compression. The new type of composite member is composed of an inner CFRP tube and an outer steel tube with concrete filled in the two tubes. The finite element analysis was made by ABAQUS on the behavior of high strength concrete filled square steel tubular columns with inner CFRP circular tube subjected to bi-axial eccentric loading. The results obtained fromthe finite element analysis were verified with the experimental results. In addition, the load-deflection curves in the whole process were calculated and analyzed, which can be divided into three segments: Elastic phase, plastic phase, descending phase. Based on the load-deflection curves, the stresses analysis on the core concrete, CFRP tube and steel tube were conducted. The confinement effect of the CFRP tube improves the ductility of HCFST-CFRP stub column. CFRP ratio and eccentricity affect the ultimate bearing capacity of HCFST stub column. Finally, a calculation formula of ultimate bearing capacity was proposed in the paper.
- Subjects
CONCRETE-filled tubes; HIGH strength concrete; STEEL tubes; CARBON fiber-reinforced plastics; STRAINS &; stresses (Mechanics); TUBES
- Publication
CMES-Computer Modeling in Engineering & Sciences, 2021, Vol 127, Issue 1, p273
- ISSN
1526-1492
- Publication type
Article
- DOI
10.32604/cmes.2021.014606