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http://dx.doi.org/10.12989/sem.2020.75.6.643

Test and simulation of circular steel tube confined concrete (STCC) columns made of plain UHPC  

Le, Phong T. (Thuyloi University)
Le, An H. (NTT Hi-Tech Institute, Nguyen Tat Thanh University)
Binglin, Lai (Department of Civil and Environmental Engineering, National University of Singapore)
Publication Information
Structural Engineering and Mechanics / v.75, no.6, 2020 , pp. 643-657 More about this Journal
Abstract
This study presents experimental and numerical investigations on circular steel tube confined ultra high performance concrete (UHPC) columns under axial compression. The plain UHPC without fibers was designed to achieve a compressive strength ranged between 150 MPa and 200 MPa. Test results revealed that loading on only the UHPC core can generate a significant confinement effect for the UHPC core, thus leading to an increase in both strength and ductility of columns, and restricting the inherent brittleness of unconfined UHPC. All tested columns failed by shear plane failure of the UHPC core, this causes a softening stage in the axial load versus axial strain curves. In addition, an increase in the steel tube thickness or the confinement index was found to increase the strength and ductility enhancement and to reduce the magnitude of the loss of load capacity. Besides, steel tube with higher yield strength can improve the post-peak behavior. Based on the test results, the load contribution of the steel tube and the concrete core to the total load was examined. It was found that no significant confinement effect can be developed before the peak load, while the ductility of post-peak stage is mainly affected by the degree of the confinement effect. A finite element model (FEM) was also constructed in ABAQUS software to validate the test results. The effect of bond strength between the steel tube and the UHPC core was also investigated through the change of friction coefficient in FEM. Furthermore, the mechanism of circular steel tube confined UHPC columns was examined using the established FEM. Based on the results of FEM, the confining pressures along the height of each modeled column were shown. Furthermore, the interaction between the steel tube and the UHPC core was displayed through the slip length and shear stresses between two surfaces of two materials.
Keywords
UHPC; steel tube; axial compression; confinement effect; confinement index; FEM;
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Times Cited By KSCI : 6  (Citation Analysis)
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1 Giakoumelis, G. and Lam, D. (2004), "Axial capacity of circular concrete-filled tube columns", J. Construct. Steel Res., 60(7), 1049-1068. https://doi.org/10.1016/j.jcsr.2003.10.001.   DOI
2 Haghinejad, A. and Nematzadeh M. (2016), "Three-dimensional finite element analysis of compressive behavior of circular steel tube-confined concrete stub columns by new confinement relationships", Latin American J. Solids Struct., 13, 916-944. http://dx.doi.org/10.1590/1679-78252631.   DOI
3 Han L., Yao, G.H., Chen, Z.P. and Yu, Q. (2005), "Experimental behavior of steel tube confined concrete (STCC) columns", Steel Compos. Struct., 5(6), 459-84. https://doi.org/10.12989/scs.2005.5.6.459   DOI
4 Han, L.H.; Liu, W. and Yang, Y.F. (2008), "Behavior of thin walled steel tube confined concrete stub columns subjected to axial local compression", Thin-Walled Struct., 46, 155-164. https://doi.org/10.1016/j.tws.2007.08.029.   DOI
5 Johansson, M. (2002), "Composite action and confinement effects in tubular steel-concrete columns", Ph.D. Dissertation, Department of Structural Engineering, Concrete Structures, Chalmers University of Technology, Goteborg, Sweden.
6 Johansson, M. and Gylltoft, K. (2002), "Mechanical behavior of circular steel-concrete composite stub columns", J. Struct. Eng., 128(8), 1073-1081. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:8(1073).   DOI
7 Liew, J.Y.R. and Xiong, D.X. (2012), "Ultra-high strength concrete filled composite columns for multi-storey building construction", Adv. Struct. Eng., 15(9), 1487-1503. https://doi.org/10.1260/1369-4332.15.9.1487.   DOI
8 Gupta, P.K. and Singh, H. (2014), "Numerical study of confinement in short concrete filled steel tube columns", Latin American J. Solids Struct., 11, 1445-1462. http://dx.doi.org/10.1590/S1679-78252014000800010.   DOI
9 Liu, J., Zhang, S., Zhang, X. and Guo, L. (2009), "Behavior and strength of circular tube confined reinforced-concrete (CTRC) columns", J. Construct. Steel Res., 65, 1447-1458. https://doi.org/10.1016/j.jcsr.2009.03.014.   DOI
10 Liu, J., Zhou, X. and Gan, D. (2016), "Effect of friction on axially loaded stub circular tubed columns", Adv. Struct. Eng., 19(3), 546-559. https://doi.org/10.1177/1369433216630125.   DOI
11 Papanikolaou, V.K. and Kappos, A.J. (2007), "Confinement-sensitive plasticity constitutive model for concrete in triaxial compression" Int. J. Solids Struct, 44, 7021-7048. https://doi.org/10.1016/j.ijsolstr.2007.03.022.   DOI
12 Shin, H.O., Soon, Y.S., Cook, W.D. and Michell, D. (2015), "Effect of confinement on the axial load response of ultrahigh-strength concrete columns", J. Struct. Eng., 141(6): 04014151-1:04014151-12. https://doi.org/10.1061/(ASCE)ST.1943541X.0001106.   DOI
13 Tao, Z., Wang, Z.B. and Yu, Q. (2013), "Finite element modelling of concrete-filled steel stub columns under axial compression". J. Constr. Steel Res. 89, 121-131. https://doi.org/10.1016/j.jcsr.2013.07.001.   DOI
14 Tasdemir, M.A., Tasdemir, C., Akyuz, S., Jefferson, A.D., Lydon, F.D. and Barr, B.I.G. (1998), "Evaluation of strains at peak stresses in concrete: A three-phase composite model approach", Cem. Concr. Compos. 20, 301-318. https://doi.org/10.1016/S0958-9465(98)00012-2.   DOI
15 Tue, N.V., Kuchler, M., Schenck, G. and Jurgen, R. (2004b), "Application of UHPC filled tubes in buildings and bridges" Proceeding of International Symposium on Ultra High Performance Concrete, Kassel, Germany, March.
16 Tue, N.V., Schneider, H., Simsch, G. and Schmidt, D. (2004a), "Bearing capacity of stub columns made of NSC, HSC and UHPC confined by a steel tube", Proceeding of First International Symposium on Ultra High Performance Concrete, Kassel, Germany, March.
17 An, L.H. and Fehling, E. (2017c), "Assessment of axial stress-strain model for UHPC confined by circular steel tube stub columns", Struct. Eng. Mech., 63(3), 371-384. https://doi.org/10.12989/sem.2017.63.3.371.   DOI
18 An, L.H. and Fehling E.(2017f), "Numerical study of circular steel tube confined concrete (STCC) stub columns with various concrete strengths", J. Construct. Steel Res., 136, 238-255. https://doi.org/10.1016/j.jcsr.2017.05.020.   DOI
19 An, L.H. and Fehling, E. (2017a), "A review and analysis of UHPC filled steel tube columns", Struct. Eng. Mech., 61(2), 417-430. https://doi.org/10.12989/sem.2017.62.4.417.
20 An, L.H. and Fehling, E. (2017b), "Analysis of circular steel tube confined UHPC stub columns", Steel Compos. Struct., 23(6), 669-682. https://doi.org/10.12989/scs.2017.23.6.669.   DOI
21 An, L.H. and Fehling, E. (2017d), "Influence of steel fiber content and type on the uniaxial tensile and compressive behavior of UHPC", Construct. Build. Mater., 153, 790-806. https://doi.org/10.1016/j.conbuildmat.2017.07.130   DOI
22 An, L.H. and Fehling, E. (2017e), "Numerical analysis of steel tube confined UHPC stubs columns", Comput. Concrete, 19(3), 263-273. https://doi.org/10.12989/cac.2017.19.3.263.   DOI
23 Binici, B. (2005), "An analytical model for stress-strain behavior of confined concrete", Eng. Struct., 27, 1040-1051. https://doi.org/10.1016/j.engstruct.2005.03.002.   DOI
24 Architectural Institute of Japan (AIJ) (2001), Recommendation for Design and Construction of Concrete Filled Steel Tubular Structures, AIJ, Japan.
25 Aslani, F., Uy, B., Tao, Z. and Mashiri, F. (2015), "Predicting the axial load capacity of high-strength concrete filled steel tubular columns", Steel Compos. Struct., 19(4), 967-993. https://doi.org/10.12989/scs.2015.19.4.967.   DOI
26 Attard, M.M. and Setunge, S. (1996), "Stress-Strain Relationship of Confined and Unconfined Concrete", Mater. J., 93, 432-442.
27 Yu, Q., Tao, Z., Liu, W. and Chen, Z.B. (2010), "Analysis and calculations of steel tube confined concrete (STCC) stub columns", J. Construct. Steel Res., 66(1), 53-64. https://doi.org/10.1016/j.jcsr.2009.08.003.   DOI
28 Xiong, M.X., Xiong, D.X. and Liew, J.Y.R. (2017), "Axial performance of short concrete filled steel tubes with high-and ultra-high-strength materials", Eng. Struct., 136, 494-510. https://doi.org/10.1016/j.engstruct.2017.01.037.   DOI
29 Yan, P.Y. and Feng, J.W. (2008), "Mechanical behavior of UHPC and UHPC filled steel tubular stub columns", Proceeding of Second International Symposium on Ultra High Performance Concrete, Kassel, Germany, March.
30 Yang, X., Zohrevand, P. and Mirmiran, A. (2015), "Behavior of ultrahigh-performance concrete confined by steel", J. Mater. Civil Eng. ASCE, 28(10), 04016113-1: 04016113-8. https://doi.org/10.1061/(ASCE)MT.19435533.0001623
31 Yu, T., Teng, J.G., Wong, Y.L. and Dong, S.L. (2010), "Finite element modeling of confined concrete-I: Drucker-Prager type plasticity model", Eng. Struct., 32, 665-679. https://doi.org/10.1016/j.engstruct.2009.11.014   DOI
32 Zhang, S., Guo, L., Ye, Z. and Wang, Y. (2005), "Behavior of steel tube and confined high strength concrete for concrete-filled RHS tubes", Adv. Struct. Eng., 8(2), 101-116. https://doi.org/10.1260/1369433054037976.   DOI
33 Zohrevand, P. and Mirmiran, A. (2011), "Behavior of ultrahigh-performance concrete confined by fiber reinforced polymers", J. Mater. Civil Eng. ASCE, 23(12), 1727-1734. https://doi.org/10.1061/(ASCE)MT.19435533.0000324   DOI
34 Empelmann, M., Teutsch, M. and Steven, G. (2004), "Improvement of the post fracture behaviour of UHPC by fibres", Proceeding of 2nd International Symposium on Ultra High Performance Concrete, Kassel, March.
35 De Oliveira, W.L.A., De Nardin, S., De Cresce El Debs, A.L.H. and El Debs, M.K. (2010), "Evaluation of passive confinement in CFT columns", J. Construct. Steel Res., 66(4), 487-495. https://doi.org/10.1016/j.jcsr.2009.11.004.   DOI
36 DIN 1048-5:1991-06, Prufverfahren fur Beton, Teil 5: Festbeton, gesondert hergestellte Probekorper, Normenausschuss fur Bauwesen (NABau) im DIN Deutsches Institut fur Norming e.V., Beuth Verlag GmBH, Berlin, Germany.
37 DIN EN 12350-8:2010-12, Testing fresh concrete - Part 8: self-compacting concrete-slump-flow test, German version EN 12350-8, 2010, Beuth Verlag, Berlin.
38 DIN EN 12390-3:2009-7, Testing hardened concrete-Part 3: Compressive strength of test specimens, German version EN 12390-3:2009, Beuth Verlag, Berlin.
39 Ding, F.X., Tan, L., Liu, X.M. and Wang, L. (2017), "Behavior of circular thin-walled steel tube confined concrete stub columns", Steel Compos. Struct., 23(2), 229-238. https://doi.org/10.12989/scs.2017.23.2.229.   DOI
40 Empelmann, M., Teutsch, M. and Steven, G. (2008), "Load-bearing behaviour of centrically loaded UHPFRC-columns", Proceeding of Second International Symposium on Ultra High Performance Concrete, Kassel, March.
41 European standard EN 10002-1 (2001), Metallic material - Tensile testing - Part 1: Method of test at ambient temperature, Brussels, Belgium.
42 Graybeal B.A. (2005), "Characterization of the behavior of ultra-high performance concrete", Ph.D. Dissertation, University of Maryland, USA.
43 Al-Ani, Y.R. (2016), "Finite element study to address the axial capacity of the circular concrete-filled steel tubular stub columns", Thin-Walled Struct., 126, 2-15. https://doi.org/10.1016/j.tws.2017.06.005.   DOI
44 Abbas, Y.R. (2017), "Nonlinear Finite Element Analysis to the Circular CFST Stub Columns", Procedia Eng., 173, 1692-1699. https://doi.org/10.1016/j.proeng.2016.12.197.   DOI