Abstract: In order to study the effect of different hollow ratios on the axial compression performance of high performance polypropylene fiber reinforced lightweight aggregate concrete square hollow columns, 7 groups (14) of axial compression column tests were carried out and four reinforced concrete columns were performed numerical simulations by using finite element numerical simulation software ABAQUS. The results showed that as the hollow rate increased, the number of cracks on the concrete surface of the specimen increased, and the peak load decreased; most of the unreinforced hollow columns were two vertical main cracks penetrating from top to bottom concentrated near the square holes. The concrete da-mage was serious and the elastic stiffness was significantly reduced; however, most of the reinforced hollow columns had a diagonal main crack with small crack width, and the concrete had good integrity; the ductility of hollow columns increased first and then decreased and when the hollow rate was 9%, the ductility coefficient of the hollow column obtained the maximum value. Generally speaking, the ductility of hollow columns was better than that of solid columns. The finite element simulation results showed that the concrete began to fail and the longitudinal bars yielded in the elastoplastic stage, and the concrete was seriously damaged in the descending section.
1 Kim T H, Choi J H, Lee J H, et al. Magazine of Concrete Research,2013, 65(21), 1277. 2 Shin M, Choi Y Y, Sun C, et al. Engineering Structures, 2013, 56, 958. 3 Zhang Y, Harries K A, Yuan W. Engineering Structures,2013,48,255. 4 Cassese P, Ricci P, Verderame G M. Engineering Structures, 2017, 144, 88. 5 Liang X, Sritharan S. Journal of Structural Engineering,2018,144(9),1. 6 Liang X, Sritharan S. Engineering Structures,2019, 191, 526. 7 AlAjarmeh O S, Manalo A C, Benmokrane B, et al. Construction & Building Materials, 2019, 194, 12. 8 AlAjarmeh O S, Manalo A C, Benmokrane B, et al. Engineering Structures, 2020, 203, 109829. 9 Kusumawardaningsih Y, Hadi M N S. Composite Structures, 2010, 93(1), 198. 10 Micelli F, Modarelli R. Composites Part B: Engineering, 2013, 45(1), 1420. 11 Jameel M T, Sheikh M N, Hadi M N S. Composite Structures,2017, 171, 538. 12 Hadi M N S, Le T D. Construction & Building Materials, 2014, 50, 62. 13 Hadi M N S, Jameel M T, Sheikh M N. Journal of Composite Construction, 2017, 1, 1. 14 Lignola G P, Prota A, Manfredi G, et al. Journal of Composites for Construction, 2007, 11(1), 42. 15 Lignola G P, Nardone F, Prota A, et al. Journal of Composites for Construction, 2011, 15(4), 545. 16 Lignola G P, Prota A, Manfredi G, et al. Construction & Building Materials, 2012, 35, 947. 17 Li J J, Niu J G, Wan C J, et al. Construction & Building Materials, 2016, 118, 27. 18 Niu J G, Liu J S, Wang J L. Materials Reports B: Research Papers, 2018, 32(7), 2407(in Chinese). 牛建刚, 刘江森, 王佳雷.材料导报:研究篇, 2018, 32(7), 2407. 19 Wang L M, Wu Y F. Engineering Structures, 2008, 30, 493. 20 Liu H Z. Experimental study on stress-strain relationship of plastic steel fiber reinforced lightweight aggregate concrete. Master's Thesis, Inner Mongolia University of Science and Technology,China, 2017(in Chinese). 刘洪振. 塑钢纤维增强轻骨料混凝土受压应力-应变关系试验研究. 硕士学位论文, 内蒙古科技大学, 2017.
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2021, Vol. 35 
