Abstract
In practice, it is common for circular concrete-filled CFRP-steel tube (C-CF-CFRP-ST) member severing under eccentric load, but there are few related investigations on its mechanical behavior currently. In this study, experimental study and finite element analysis are employed to reveal the static behavior of circular concrete filled CFRP-steel tube under eccentric compression. Total 32 C-CF-CFRP-ST specimens, taking the slenderness ratio (λ) and eccentric ratio (e) as principal parameters, were designed and tested firstly, obtaining the failure modes, N-um curve and the strains in the steel tube and CFRP It was found that the damage of concrete became more serious with the decrease of the slenderness ratio but got mitigated with the increase of eccentricity. Additionally, it was indicated that the N-um curve of C-CF-CFRP-ST consisted of three stages, namely elastic stage, elastic-plastic stage and plastic stage. In the elastic-plastic stage, the damage is gradually accumulated in CFRP and concrete, and the specimens finally exhibited ductile failure in the end of plastic stage. In the entire loading process, CFRP has almost same strains compared to the steel tube. Following the experimental study, finite element analysis was conducted to investigate the static behavior of C-CF-CFRP-ST comprehensively. The proposed finite element model reproduced the compressive behavior of C-CF-CFRP-ST, in terms of failure modes and N-um curves. The influence of material strength, layers of CFRP and steel ratio on the static behavior of C-CF-CFRP-ST specimens were then studied through numerical parametric study. In the end, equations for predicting the bearing capacity of C-CF-CFRP-ST are proposed, and the predicted static strengths of the specimens are basically consistent with the experimental results.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Aslani F, Uy B, Tao Z (2015) Behaviour and design of composite columns incorporating compact high-strength steel plates. Journal of Constructional Steel Research 10(7):94–110, DOI: https://doi.org/10.1016/j.jcsr.2015.01.005
Che Y, Wang QL, Shao YB (2012) Compressive performances of the concrete filled circular CFRP-steel tube (C-CFRP-CFST). Advanced Steel Construction 8(4):311–338, DOI: https://doi.org/10.18057/IJASC.2012.8.4.2
Choi KK (2010) Analytical model of circular CFRP confined concrete-filled steel tubular columns under axial compression. Journal of Composites for Construction 14(1):125–133, DOI: https://doi.org/10.1061/(ASCE)CC.1943-5614.0000056
Feng ML, Wang QL, Shao YB (2017) Static behavior of axially compressed square concrete filled CFRP-steel tubular (S-CF-CFRP-ST) columns with moderate slenderness. Thin-Walled Structure 110(1):106–122, DOI: https://doi.org/10.1016/j.tws.2016.10.019
Guo LH, Zhang SH, Kim WJ, Ranzi G (2007) Behavior of square hollow steel tubes and steel tubes filled with concrete. Thin-Walled Structures 45(12):961–973, DOI: https://doi.org/10.1016/j.tws.2007.07.009
Han LH (2004) Behavior and calculation on concrete-filled steel CHS (circular hollow section) specimens. Steel and Composite Structures 4(3):169–188, DOI: https://doi.org/10.12989/scs.2004.4.3.169
Han LH, Zhao XL, Tao Z (2001) Tests and mechanics model of concrete-filled stub columns, columns and beam-columns. Steel and Composite Structures 1(1):51–74, DOI: https://doi.org/10.1296/SCS2001.01.01.04
Hu YM, Yu T, Teng JG (2011) FRP-confined circular concrete-filled thin steel tubes under axial compression. Journal of Composites for Construction 15(5):850–860, DOI: https://doi.org/10.1061/(ASCE)CC.1943-5614.0000217
Li DS (2016) Identification of failure mechanisms for CFRP-confined circular concrete-filled steel tubular columns through acoustic emission signals. Smart Structures and Systems 18(3):525–540, DOI: https://doi.org/10.12989/sss.2016.18.3.525
Lu X, Liu YJ, Sun LP (2020) Influence of initial imperfections on post buckling strength of concrete filled rectangular steel tubular column panels. Journal of Architectural Science and Engineering 37(5):170–181, DOI: https://doi.org/10.19815/j.jace.2020.09044 (in Chinese)
Park JW (2010) Behaviors of concrete filled square steel tubes confined by carbon fiber sheets (CFS) under compression and cyclic loads. Steel and Composite Structures 10(2):187–205, DOI: https://doi.org/10.12989/scs.2010.10.2.187
Sundarraja MC, Ganesh PG (2010) Experimental study on CFST members strengthened by CFRP composite under compression. Journal of Constructional Steel Research 72(5):75–83, DOI: https://doi.org/10.1016/j.jcsr.2011.10.014
Sundarraja MC, Ganesh PG (2011) Finite element modeling of CFRP jacketed CFST members under flexural loading. Thin-Walled Structures 49(12):1483–1491, DOI: https://doi.org/10.1016/j.tws.2011.07.008
Tao Z, Han LH, Zhuang JP (2007) Axial loading behavior of CFRP strengthened concrete-filled steel tubular stub columns. Advances in Structural Engineering 10(1):37–46
Tao Z, Wang ZB, Han LH, Yu B (2011) Fire performance of concrete-filled steel tubular columns strengthened by CFRP. Steel and Composite Structures 11(4):307–324, DOI: https://doi.org/10.13577/j.jnd.2015.0207 (in Chinese)
Wang QL, Li J, Shao YB (2015) Flexural performances of square concrete filled CFRP-steel tubes (S-CF-CFRP-ST). Advances in Structural Engineering 18(8):1319–1344, DOI: https://doi.org/10.1260/1369-4332.18.8.1319
Wang QL, Qu SE, Shao YB, Feng LM (2016) Static behavior of axially compressed circular concrete filled CFRP-steel tubular (C-CF-CFRP-ST) columns with moderate slenderness ratio. Advanced Steel Construction 12(3):263–295, DOI: https://doi.org/10.18057/ijasc.2016.12.3.4
Wang QL, Shao YB (2014) Compressive performances of concrete filled square CFRP-steel tubes (S-CFRP-CFST). Steel and Composite Structures 16(5):455–480, DOI: https://doi.org/10.12989/scs.2014.16.5.455
Wang QL, Shao YB (2015) Flexural performance of circular concrete filled CFRP-steel tubes. Advanced Steel Construction 11(2):127–149, DOI: https://doi.org/10.18057/ijasc.2015.11.2.1
Yao W (2006) Orthogonal experimental study on the effect of concrete mix proportion on shrinkage. Journal of Building Materials 1(1):92–98, DOI: https://doi.org/10.3969/j.issn.1007-9629.2006.01.017 (in Chinese)
Zand AW, Badaruzzaman WHW, Mutalib AA, Hilo SJ (2016) The enhanced performance of CFST beams using different strengthening schemes involving unidirectional CFRP sheets: An experimental study. Engineering Structures 128(1):184–198, DOI: https://doi.org/10.1016/j.engstruct.2016.09.044
Zand AW, Badaruzzaman WHW, Mutalib AA, Hilo SJ (2017) Rehabilitation and strengthening of high-strength rectangular CFST beams using a partial wrapping scheme of CFRP sheets: Experimental and numerical study. Thin-Walled Structures 114(1):80–91, DOI: https://doi.org/10.1016/j.tws.2017.01.028
Acknowledgments
The research reported in the study is supported by Project for Talent of Liaoning Province of China (No. XLYC1902009), PHD Start-up Fund of Natural Science Foundation of Liaoning Province of China (20170520139) and Scientific Innovation Group for Youths of Sichuan Province of China (No. 2019JDTD0017).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Peng, K., Shao, Y. & Wang, Q. Analysis of Bearing Capacity of Circular Concrete Filled CFRP-Steel Tubular Beam-Column. KSCE J Civ Eng 26, 207–220 (2022). https://doi.org/10.1007/s12205-021-2103-5
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12205-021-2103-5