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http://dx.doi.org/10.12989/scs.2022.43.6.785

Shear strength prediction of concrete-encased steel beams based on compatible truss-arch model  

Xue, Yicong (School of Civil Engineering, Xi'an University of Architecture & Technology)
Shang, Chongxin (School of Civil Engineering, Xi'an University of Architecture & Technology)
Yang, Yong (School of Civil Engineering, Xi'an University of Architecture & Technology)
Yu, Yunlong (School of Civil Engineering, Xi'an University of Architecture & Technology)
Wang, Zhanjie (New Era (Xi'an) Design Engineering Co., Ltd)
Publication Information
Steel and Composite Structures / v.43, no.6, 2022 , pp. 785-796 More about this Journal
Abstract
Concrete-encased steel (CES) beam, in which structural steel is encased in a reinforced concrete (RC) section, is widely applied in high-rise buildings as transfer beams due to its high load-carrying capacity, great stiffness, and good durability. However, these CES beams are prone to shear failure because of the low shear span-to-depth ratio and the heavy load. Due to the high load-carrying capacity and the brittle failure process of the shear failure, the accurate strength prediction of CES beams significantly influences the assessment of structural safety. In current design codes, design formulas for predicting the shear strength of CES beams are based on the so-called "superposition method". This method indicates that the shear strength of CES beams can be obtained by superposing the shear strengths of the RC part and the steel shape. Nevertheless, in some cases, this method yields errors on the unsafe side because the shear strengths of these two parts cannot be achieved simultaneously. This paper clarifies the conditions at which the superposition method does not hold true, and the shear strength of CES beams is investigated using a compatible truss-arch model. Considering the deformation compatibility between the steel shape and the RC part, the method to obtain the shear strength of CES beams is proposed. Finally, the proposed model is compared with other calculation methods from codes AISC 360 (USA, North America), Eurocode 4 (Europe), YB 9082 (China, Asia), JGJ 138 (China, Asia), and AS/NZS 2327 (Australia/New Zealand, Oceania) using the available test data consisting of 45 CES beams. The results indicate that the proposed model can predict the shear strength of CES beams with sufficient accuracy and safety. Without considering the deformation compatibility, the calculation methods from the codes AISC 360, Eurocode 4, YB 9082, JGJ 138, and AS/NZS 2327 lead to excessively conservative or unsafe predictions.
Keywords
concrete-encased steel; deformation compatibility; design codes; shear strength; truss-arch model;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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1 YB 9082-2006 (2006), Technical Specification of Steel-Reinforced Concrete Structures, Metallurgical Industry Press; Beijing, China.
2 Anuntasena, W., Lenwari, A. and Thepchatri, T. (2020), "Axial compression behavior of concrete-encased cellular steel columns", J. Construct. Steel Res., 172, 106220. https://doi.org/10.1016/j.jcsr.2020.106220.   DOI
3 ASCE/SEI 41-13 (2014), Seismic Evaluation and Retrofit of Existing Buildings (41-13), American Society of Civil Engineers, Reston, VA, U.S.A.
4 BS EN 1994-1-1:2004 (2004), Eurocode 4: Design of Composite Steel and Concrete Structures-Part 1-1: General Rules and Rules for Buildings, European Committee for Standardization, Belgium.
5 Chen, C., Lin, K. and Chen, Y. (2018), "Behavior and shear strength of steel shape reinforced concrete deep beams", Eng. Struct., 175, 425-435. https://doi.org/10.1016/j.engstruct.2018.08.045.   DOI
6 Deng, M., Ma, F., Ye, W. and Liang, X. (2018), "Investigation of the shear strength of HDC deep beams based on a modified direct strut-and-tie model", Construct. Build. Mater., 172, 340-348. https://doi.org/10.1016/j.conbuildmat.2018.03.274.   DOI
7 Du, Y., Zhou, H., Jiang, J. and Liew J.Y.R. (2021), "Behaviour of ultra-high strength concrete encased steel columns subject to ISO-834 fire", Steel Compos. Struct., 38(2), 121-139. http://dx.doi.org/10.12989/scs.2021.38.2.121.   DOI
8 Ichinose, T. (1992), "A shear design equation for ductile R/C members", Earthq. Eng. Struct. Dyn., 21(3), 197-214. https://doi.org/10.1002/eqe.4290210302.   DOI
9 Lee, C.K., Khan, M.K.I., Zhang, Y.X. and Rana, M.M. (2020), "Engineered cementitious composites (ECC) encased concretesteel composite stub columns under concentric compression", Structures, 24, 386-399. https://doi.org/10.1016/j.istruc.2020.01.023   DOI
10 Khan, M.K.I., Lee, C.K. and Zhang, Y.X. (2020), "Numerical modelling of engineered cementitious composites-concrete encased steel composite columns", J. Construct. Steel Res., 170, 106082. https://doi.org/10.1016/j.jcsr.2020.106082.   DOI
11 Lim, J.J., Kim, J.Y., Kim, J.W. and Eom, T.S. (2021), "Flexural tests of concrete-encased composite girders with high-strength steel angle", J. Construct. Steel Res., 182, 106650. https://doi.org/10.1016/j.jcsr.2021.106650.   DOI
12 Pan, Z., Li, B. and Lu, Z. (2014), "Effective shear stiffness of diagonally cracked reinforced concrete beams", Eng. Struct., 59, 95-103. https://doi.org/10.1016/j.engstruct.2013.10.023.   DOI
13 Pereira, M.F., Nardin, S.D. and Debs, A.L.H.C.EI. (2020), "Partially encased composite columns using fiber reinforced concrete: experimental study", Steel Compos. Struct., 34(6), 909-927. http://doi.org/10.12989/scs.2020.34.6.909.   DOI
14 Jeong, J. and Kim, W. (2014), "Shear resistant mechanism into base components: beam action and arch action in shear-critical RC members", Int. J. Concrete Struct. Mater., 8(1), 1-14. https://doi.org/10.1007/s40069-013-0064-x.   DOI
15 Wu, C., Pan, Z., Kim, K. and Meng, S. (2017), "Theoretical and experimental study of effective shear stiffness of reinforced ECC columns", Int. J. Concrete Struct. Mater., 11(4), 585-597. https://doi.org/10.1007/s40069-017-0219-2.   DOI
16 Xu, J., Chen, Z., Xue, J., Chen, Y. and Liu, Z. (2017), "A review of experimental results of steel reinforced recycled aggregate concrete members and structures in China (2010-2016)", Procedia Eng., 210, 109-119. https://doi.org/10.1016/j.proeng.2017.11.055.   DOI
17 Yao, D., Jia, J., Wu, F. and Yu, F. (2014), "Shear performance of pre-stressed ultra high strength concrete encased steel beams", Construct. Build. Mater., 52, 194-201. http://dx.doi.org/10.1016/j.conbuildmat.2013.11.006.   DOI
18 Kim, J.H. and Mander, J.B. (2007), "Influence of transverse reinforcement on elastic shear stiffness of cracked concrete elements", Eng. Struct., 29(8), 1798-1807. https://doi.org/10.1016/j.engstruct.2006.10.001.   DOI
19 Zheng, S., Hu, Y., Che, S., Wang, B. and Tao, Q. (2011), "Experimental study on the shear capacity of SRHSHPC beams", Eng. Mech., 28(3), 129-135. http://dx.doi.org/1000-4750(2011)03-0129-07.   DOI
20 Thusoo, S., Obara, T., Kono, S and Miyahara K. (2021), "Design models for steel encased high-strength precast concrete piles under axial-flexural loads", Eng. Struct., 228, 111465. https://doi.org/10.1016/j.engstruct.2020.111465.   DOI
21 Yang, Y., Xue, Y. and Yu, Y. (2019), "Theoretical and experimental study on shear strength of precast steel reinforced concrete beam", Steel Compos. Struct., 32(4), 443-454. http://dx.doi.org/10.12989/scs.2019.32.4.443.   DOI
22 Yu, Y., Yang, Y., Xue, Y. and Liu, Y. (2020), "Shear behavior and shear capacity prediction of precast concrete-encased steel beams", Steel Compos. Struct., 36(3), 261-272. http://dx.doi.org/10.12989/scs.2020.36.3.261.   DOI
23 Hwang, S. and Lee, H. (2002), "Strength prediction for discontinuity regions by softened strut-and-tie model", J. Struct. Eng., 128(12), 1519-1526. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:12(1519).   DOI
24 AISC 360-16 (2016), Specification for Structural Steel Buildings, American Institute of Steel Construction; Chicago, IL, U.S.A.
25 AS/NZS 2327:2017 (2017), Composite Structures-Composite Steel-Concrete Construction in Buildings, Sydney, NSW, Australia.
26 Chrzanowski, M., Odenbreit, C., Obiala, R., Bogdan, T. and Degee, H. (2021), "Effective bending stiffness of steel-concrete composite columns with multiple encased steel profiles", J. Construct. Steel Res., 181, 106607. https://doi.org/10.1016/j.jcsr.2021.106607.   DOI
27 JGJ 138-2016 (2016), Code for Design of Composite Structures, MoHURD, Beijing, China. (in Chinese)
28 Li, G., Hou, C., Han, L. and Shen, L. (2020), "Numerical study of concrete-encased CFST under preload followed by sustained service load", Steel Compos. Struct., 35(1), 93-109. http://dx.doi.org/10.12989/scs.2020.35.1.093.   DOI
29 Lu, W. (2006), "Shear strength prediction for steel reinforced concrete deep beams", J. Construct. Steel Res., 62, 933-942. https://doi.org/10.1016/j.jcsr.2006.02.007.   DOI