Abstract
To study the influence of an initial imperfection on the cyclic performance of concrete-filled steel tubular (CFST) members, twelve specimens were cast with different notch lengths, notch widths, notch orientations and notch locations. These specimens were implemented in a lateral quasi-static test, and the test details, damage modes, load-deflection responses and strain histories were detailed and recorded. The measured and theoretical equivalent elastic flexural stiffness, displacement ductility coefficient, maximum lateral load, and measured and theoretical bending capacity of all the specimens were collected and analysed. The research results showed that all specimens mainly experienced flexural damage with different damage levels. Good agreement was observed between the measured and theoretical elastic flexural stiffness as well as the bending capacity for the intact specimens (specimen 1 and specimen 2). The mid-span notch weakened the equivalent elastic flexural stiffness, displacement ductility and flexural capacity of the CFST specimens. Furthermore, a horizontal mid-span notch resulted in greater impact on the specimen behaviour than a vertical notch or a quarter-span notch, an observation that deserves particular attention.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Ding FX, Fu L, Yu ZW (2017) Behaviors of axially loaded square concrete-filled steel tube (CFST) stub columns with notch in steel tube. Thin-Walled Structures 115:196–204, DOI: https://doi.org/10.1016/j.tws.2017.02.018
Dou C, Pi YL, Gao W (2018) Restraining requirements for lateral elastic-plastic buckling of columns accounting for random imperfections. Engineering Structures 171:260–268, DOI: https://doi.org/10.1016/j.engstruct.2018.05.087
Feng P, Qiang HL, Ye LP (2017) Discussion and definition on yield points of materials, members and structures. Engineering Mechanics 34(3):36–46, DOI: https://doi.org/10.6052/j.issn.1000-4750.2016.03.0192 (in Chinese)
Feng P, Ye LP, Huang YL (2005) Deformability and new performance indices of flexural member. Engineering Mechanics 22:28–36 (in Chinese)
GB 50936-2014 (2014) Technical code for concrete filled steel tubular structures. GB 50936-2014, China Architecture & Building Press, Beijing, China (in Chinese)
GB/T 700-2006 (2006) Carbon structural steels. GB/T 700-2006, Standardization Administration of the People’s Republic of China, Beijing, China (in Chinese)
Gu XL, Wang L, Zhang WP, Cui W (2018) Cyclic behaviour of hinged steel frames enhanced by masonry columns and/or infill walls with/without CFRP. Structure and Infrastructure Engineering 14(6):1–16, DOI: https://doi.org/10.1080/15732479.2018.1459742
Han LH, Hou CC, Wang QL (2014) Behavior of circular CFST stub columns under sustained load and chloride corrosion. Journal of Constructional Steel Research 103:23–36, DOI: https://doi.org/10.1016/j.jcsr.2014.07.021
Han LH, Ye Y, Liao FY (2016) Effects of core concrete initial imperfection on performance of eccentrically loaded CFST columns. Journal of Structural Engineering 142(12):04016132, DOI: https://doi.org/10.1061/(ASCE)ST.1943-541X.0001604
Hou CC, Han LH, Wang QL, Hou C (2016) Flexural behavior of circular concrete filled steel tubes (CFST) under sustained load and chloride corrosion. Thin-Walled Structures 107:182–196, DOI: https://doi.org/10.1016/j.tws.2016.02.020
Jamatia R, Hussain T, Deb A, Bhattachryya SK (2013) Effect of imperfections in the bond on the strength of FRP wrapped cylindrical concrete column. Composites: Part B 53:297–307, DOI: https://doi.org/10.1016/j.compositesb.2013.04.056
Kala Z, Vales J (2018) Imperfection sensitivity analysis of steel columns at ultimate limit state. Archives of Civil and Mechanical Engineering 18:1207–1218, DOI: https://doi.org/10.1016/j.acme.2018.01.009
Liao FY, Han L H, He SH (2011) Behavior of CFST shot column and beam with initial concrete imperfection: Experiments. Journal of Constructional Steel Research 67:1922–1935, DOI: https://doi.org/10.1016/j.jcsr.2011.06.009
Liao FY, Han LH, Tao Z (2013) Behavior of CFST stub columns with initial concrete imperfection: Analysis and calculations. Thin-Walled Structures 70:57–69, DOI: https://doi.org/10.1016/j.tws.2013.04.012
Liu JP, Li BY, Zhou X, Yang YL, Cheng W, Chen F (2020) Behaviour of CFST column to H-section beam connections with T-shaped vertical anchorage. Structure and Infrastructure Engineering 16(2): 306–327, DOI: https://doi.org/10.1080/15732479.2019.1655070
Patel VI, Hassanein MF, Thai HT, Abadi HA, Elchalakani M, Bai Y (2019) Ultra-high strength circular short CFST columns: Axisymmetric analysis, behaviour and design. Engineering Structures 179:268–283, DOI: https://doi.org/10.1016/j.engstruct.2018.10.081
Patel VI, Liang QQ, Hadi MNS (2014) Behavior of biaxially-loaded rectangular concrete-filled steel tubular slender beam-columns with preload effects. Thin-Walled Structures 79:166–177, DOI: https://doi.org/10.1016/j.tws.2014.02.013
Patel VI, Liang QQ, Hadi MNS (2015) Biaxially loaded high-strength concrete-filled steel tubular slender beam-columns, Part II: Parametric study. Journal of Constructional Steel Research 110:200–207, DOI: https://doi.org/10.1016/j.jcsr.2012.03.029
Sani MSHM, Muftah F, Tan CS (2020) Experimental analysis of cold-formed steel C-sections with the notch subjected to axial compression. KSCE Journal of Civil Engineering 24(4):1228–1239, DOI: https://doi.org/10.1007/s12205-020-2340-z
Subramoni PT, Saratha JP (2018) Behavior of beam-column subjected to reversed lateral loading. KSCE Journal of Civil Engineering 22(7):2464–2468, DOI: https://doi.org/10.1007/s12205-017-2023-6
Wang JT, Sun Q, Li JX (2019) Experimental study on seismic behavior of high-strength circular concretefilled thin-walled steel tubular columns. Engineering Structures 182:403–415, DOI: https://doi.org/10.1016/j.engstruct.2018.12.098
Yang ZJ, Li GC, Lang Y, Fang C (2017) Flexural behavior of high strength concrete filled square steel tube with inner CFRP circular tube. KSCE Journal of Civil Engieering 21(7):2728–2737, DOI: https://doi.org/10.1007/s12205-017-0579-9
Ye Y, Han LH, Tao Z (2016) Effects of gaps on the behavior of circular CFST members under shear. Engineering Mechanics 33:62–66+71, DOI: https://doi.org/10.6052/j.issn.1000-4750.2015.05.S010 (in Chinese)
Yuan F, Chen MC, Huang H, Xie L, Wang C (2018) Circular concrete filled steel tubular (CFST) columns under cyclic load and acid rain attack: Test simulation. Thin-Walled Structures 122:90–101, DOI: https://doi.org/10.1016/j.tws.2017.10.005
Zand AWA, 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 114:80–91, DOI: https://doi.org/10.1016/j.tws.2017.01.028
Zhong ST (2001) Co-working of steel tube and concrete in concrete-filled steel tube (CFST) members. Journal of Harbin University of Civil Engineering & Architecture 27(6):21–27 (in Chinese)
Zhong ST (2004) The concrete-filled steel tubular structures (third edition). Tsinghua University Press, Beijing, China (in Chinese)
Zhu HQ, Stephens MT, Roeder CW, Lehman DE (2017) Inelastic response of CFST columns and connections subjected to lateral loading. Journal of Constructional Steel Research 132:130–140, DOI: https://doi.org/10.1016/j.jcsr.2017.01.016
Acknowledgements
This work was financially supported by the Science Foundation of Wuhan Institute of Technology (18QD47), in part by the National Natural Science Foundation of China (51408450), and by the Natural Science Foundation of Hubei Province (2019CFB185). These financial supports are gratefully acknowledged.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Zhu, H., Zhang, H. & Liu, L. Experimental Study on Cyclic Lateral Loaded Circular CFST Members with Initial Imperfections. KSCE J Civ Eng 25, 3064–3074 (2021). https://doi.org/10.1007/s12205-021-1931-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12205-021-1931-7