Vol. 19, No. 2, pp. 177-184 (2023)
EXPERIMENTAL AND NUMERICAL ANALYSIS OF L-SHAPED COLUMN
COMPOSED OF RECYCLED AGGREGATE CONCRETE-FILLED SQUARE
STEEL TUBES UNDER ECCENTRIC COMPRESSION
Teng-Fei Ma 1, 2, Zhi-Hua Chen 1, Kashan Khan 1 and Yan-Sheng Du 1, *
1 School of Civil Engineering, Tianjin University, Tianjin 300072, China
2 Department of Civil Engineering, North China Institute of Aerospace Engineering, Langfang 065000, China
* (Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 31 August 2022; Revised: 9 February 2023; Accepted: 23 February 2023
DOI:10.18057/IJASC.2023.19.2.10
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ABSTRACT
The eccentric compression behaviors of L-shaped columns made of recycled aggregate concrete-filled square steel tubes (L-RACFST) with various replacement ratios of recycled coarse aggregate (RCA) are introduced in this paper. The experimental study demonstrates that the overall instability failure is the final failure mode of the L-RACFST columns and that the replacement ratio of RCA has little influence on the final failure mode of the specimens. When the RCA replacement ratio exceeds 40%, the specimens frequently move right into the failure stage. Recycled aggregate concrete (RAC) inside steel tubes can increase the load-carrying capacity and stiffness, preventing them from buckling inward compared to hollow steel tubes. The load-carrying capacity of the specimens gradually decreases as the replacement ratio of the RCA rises, and the ductility and stiffness deteriorate progressively. The bearing capacity declines more quickly, and the ductility coefficient and stiffness coefficient fall more slowly when the replacement ratio of RCA is higher than 40%. The bearing capacity of the specimens decreased by 29%, the ductility coefficient by 54%, and the stiffness coefficient by 60% as the replacement ratio of RCA increased from 0% to 100%. The specimen's ultimate strength decreases as the eccentricity rises. The numerical analysis results demonstrate that in the engineering design, the specimens' ultimate strength can be increased by strengthening the steel and raising the steel ratio; however, it is not advised to increase the connection plate's width to enhance the load-carrying capacity. The connection plate's primary function is to increase the stiffness of the steel surface and prevent local buckling, which has little bearing on improving the specimens' bearing capacity. It is advised that the replacement ratio of RCA in the L-RACFST columns should be less than 40% when considered with the research findings of reference [28].
KEYWORDS
Concrete-filled steel tube, L-shaped column, Recycled aggregate concrete, Compression behaviour
REFERENCES
[1] Etxeberria M , E Vázquez, A Marí, et al. influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete[J]. Cement & Concrete Research, 2007, 37(5):735-742.
[2] Corinaldesi V , Moriconi G . Influence of mineral additions on the performance of 100% recycled aggregate concrete[J]. Construction & Building Materials, 2009, 23(8):2869-2876.
[3] Xiao J Z , Jia-Bin L I , Sun Z P , et al. Study on Compressive Strength of Recycled Aggregate Concrete[J]. Journal of Tongji University, 2004, 32(12):1558-1561.
[4] Olek, Jan, Behnood, et al. Predicting modulus elasticity of recycled aggregate concrete using M5 ' model tree algorithm[J]. Construction and Building Materials, 2015.
[5] Wdeeing P A，Rasheeduzzafar，Khan A. Recycied concrete-a source for new aggregate. Cement Concrete and Aggregates，1984，6（1）：17-23.
[6] Ridzuan A R M, Ibrahim A, Ismail A M M, et al. Durablity performance of recycled aggregate concrete. Achieving Sustainability in Construction,2005(7):193–202.
[7] Huda S B , Alam M S . Mechanical and Freeze-Thaw Durability Properties of Recycled Aggregate Concrete Made with Recycled Coarse Aggregate[J]. Journal of Materials in Civil Engineering, 2015, 27(10):04015003.
[8] Mahmood W , Khan A U R , Ayub T . Mechanical and Durability Properties of Concrete Containing Recycled Concrete Aggregates[J]. Iranian Journal of Science and Technology, Transactions of Civil Engineering, 2021:1-20.
[9] Shi X S , Wang Q Y , Qiu C C , et al. Experimental Study on the Properties of Recycled Aggregate Concrete with Different Replacement Ratios from Earthquake-stricken Area[J]. Journal of Sichuan University(Engineering ence Edition), 2010, 42:170-176.
[10] Huang Y , Xiao J . Seismic behavior and damage assessment of recycled aggregate concrete-filled steel tube columns[J]. Tongji Daxue Xuebao/Journal of Tongji University, 2013, 41(3):330-335+354.
[11] Mohanraj E K , Kandasamy S , Malathy R . Behaviour of steel tubular stub and slender columns filled with concrete using recycled aggregates[J]. Journal of the South African Institution of Civil Engineering, 2011, 53(2):31-38.
[12] A W L , B Z L A , C Z T , et al. Mechanical behavior of recycled aggregate concrete-filled steel tube stub columns after exposure to elevated temperatures - ScienceDirect[J]. Construction and Building Materials, 2017, 146:571-581.
[13] Liu W , Cao W , Zhang J , et al. Mechanical Behavior of Recycled Aggregate Concrete-Filled Steel Tubular Columns before and after Fire[J]. Materials, 2017, 10(3):274.
[14] Liu, Feng, Liao, et al. Seismic performance of recycled aggregate concrete-filled steel tube columns[J]. Journal of Constructional Steel Research, 2017.
[15] Dong J F , Wang Q Y , Guan Z W . Structural behaviour of recycled aggregate concrete filled steel tube columns strengthened by CFRP[J]. Engineering Structures, 2013, 48:532-542.
[16] Chen Z P , Chen X H , Ke X J , et al. Experimental study on the mechanical behavior of recycled aggregate coarse concrete-filled square steel tube column. IEEE, 2010.
[17] Wang Y , Jie C , Yue G . Testing and analysis of axially loaded normal-strength recycled aggregate concrete filled steel tubular stub columns[J]. Engineering Structures, 2015, 86(mar.1):192-212.
[18] Tang Y C , Li L J , Feng W X , et al. Seismic performance of recycled aggregate concrete–filled steel tube columns[J]. Journal of Constructional Steel Research, 2017, 133:112-124.
[19] Chen Z H , Rong B , Fafitis A . Axial compression stability of a crisscross section column composed of concrete-filled square steel tubes[J]. Journal of Mechanics of Materials and Structures, 2010, 4(10):1787-1799.
[20] B. Rong, Z. Chen, A. Fafitis, N. Yang. Axial Compression Behavior and Analytical Method of L-Shaped Column Composed of Concrete-Filled Square Steel Tubes[J]. Transactions of Tianjin University, 2012(03):180-187.
[21] Chen Z , Rong B . Research on axial compression stability of L-shaped column composed of concrete-filled square steel tubes[J]. Building Structure, 2009.
[22 ]B. Rong, Z. Chen, T. Zhou. Research on axial compression strength of L-SHAPED short column composed of concrete-filled square steel tubes[J].Industrial Construction 2009, 39(11), 104.
[23] Zhou T,Chen Z ,Liu H. Seismic behavior of special shaped column composed of concrete filled steel tubes[J]. Journal of Constructional Steel Research, 2012, 75(75):131-141.
[24] Xu M , Zhou T , Chen Z , et al. Experimental study of slender LCFST columns connected by steel linking plates[J]. Journal of Constructional Steel Research, 2016, 127(DEC.):231-241.
[25] Xiong Q , Chen Z , Zhang W , et al. Compressive behaviour and design of L-shaped columns fabricated using concrete-filled steel tubes[J]. Engineering Structures, 2017, 152(dec.1):758-770.
[26] Liu J , Zhou T , Lei Z , et al. Eccentric compression performance of slender L-shaped column composed of concrete-filled steel tubes connected by steel linking plates[J]. Journal of Constructional Steel Research, 2019, 162(Nov.):105675.1-105675.16.
[27] Chen Z , Liu J , Zhou T , et al. Uniaxial Eccentric-Compression Performance Analysis for Double-Plate Connected Concrete-Filled Steel-Tube Composite Columns[J]. Journal of Structural Engineering, 2020, 146(8):04020161.
[28] Ma,T.;Chen,Z.;Du,Y.;Zhou,T.;Zhang,Y.Mechanical Properties of L-Shaped Column Composed of RAC-Filled Steel Tubes under Eccentric Compression .Metals2022,12,953. https://doi.org/10.3390/met12060953
[29] GB/T 50081-2019, Standard for test methods of concrete physical and mechanical properties, Standardization Administration of China, 2019.
[30] Du Y , Zhang Y , Chen Z , et al. Axial compressive performance of CFRP confined rectangular CFST columns using high-strength materials with moderate slenderness[J]. Construction and Building Materials, 2021, 299(4):123912.
[31] Yang Y, Han L. Compressive and flexural behaviour of recycled aggregate concrete filled steel tubes (RACFST) under short-term loadings[J].Steel & Composite Structures,2006, 6 (3): 257-284.
[32] Yang Y. Theoretical research on load-deformation relations of recycled aggregate concrete-filled steel tubular members[J]. Industrial Construction,2007, 37 (012): 1-6.
[33] Xiao J, Lan Y. Investigation on the Tensile Behavior of Recycled Aggregate Concrete [J].Journalof building materials,2006 (02): 154-158.
[34] Li J,Chen Z,Du Y,et al.Study on constitutive model of core concrete of recycled aggregate concrete filled steel tubular columns under compression[J].Industrial Construction, 2021,51(05):108-115+15.