Mechanical Properties of Ordinary Concrete Confined with Engineered Cementitious Composites (ECC)
KANG Yingjie1,2,3, GUO Zili4, YE Binbin4, PAN Peng4,5,*
1 State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, China 2 Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Shijiazhuang 050043, China 3 School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China 4 Department of Civil Engineering, Tsinghua University, Beijing 100084, China 5 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Tsinghua University, Beijing 100084, China
Abstract: Composite specimens of ordinary concrete confined with engineered cementitious composites (ECC) were prepared, considering the comprehensive utilization of the advantage of ECC in mechanical properties and the low price of ordinary concrete. Tests of compressive, tensile, and flexural were carried out, and the basic mechanical properties of composite specimens were systematically studied. The bending behavior of reinforced composite beams was also studied by numerical analysis method. The results show that the interface between ECC and concrete did not slip when the composite specimen was damaged by force, and the two materials bonded reliably to achieve synergistic stresses. Compared with ordinary concrete specimens, the compressive strength, tensile strength and flexural strength of composite specimens are improved, especially the flexural strength are most significantly improved. For the beam with a section of 100 mm×100 mm, the flexural strength is increased by 27.4% and 57.1% respectively, when the thickness of ECC is 10 mm and 15 mm. The composite specimen has considerable ductile deformation ability, and can maintain a certain integrity after failure, so it has the characteristics of high toughness. Compared with ordinary reinforced concrete beams, reinforced composite beams can take advantage of the performance advantages of ECC to significantly improve the bearing and deformation capacity.
1 Gao L, Guo E D, Zhao Y, et al. China Civil Engineering Journal, 2016, 49(3), 98(in Chinese). 高霖, 郭恩栋, 赵颖, 等. 土木工程学报, 2016, 49(3), 98. 2 Xu S L, Li H D. China Civil Engineering Journal, 2008, 41(6), 45 (in Chinese). 徐世烺, 李贺东. 土木工程学报, 2008, 41(6), 45. 3 Li Q H, Xu S L. Engineering Mechanics, 2009, 26(S2), 23 (in Chinese). 李庆华, 徐世烺. 工程力学, 2009, 26(S2), 23. 4 Wang Y C, Hou M J, Yu J T, et al. Materials Reports, 2018, 32(10), 3535 (in Chinese). 王义超, 侯梦君, 余江滔, 等. 材料导报, 2018, 32(10), 3535. 5 Wang Z B, Zhang J, Wang Q. Journal of Building Materials, 2018, 21(2), 216 (in Chinese). 王振波, 张君, 王庆. 建筑材料学报, 2018, 21(2), 216. 6 Hu C H, Gao Y E, Ding W C. Journal of Building Structures, 2013, 34(12), 135 (in Chinese). 胡春红, 高艳娥, 丁万聪. 建筑结构学报, 2013, 34(12), 135. 7 Li Q H, Huang B T, Zhou B M, et al. Journal of Building Structures, 2016, 37(1), 135 (in Chinese). 李庆华, 黄博滔, 周宝民, 等. 建筑结构学报, 2016, 37(1), 135. 8 Liu Z J, Li Y, Wen C G. Journal of Building Materials, 2016, 19(4), 746 (in Chinese). 刘泽军, 李艳, 温丛格. 建筑材料学报. 2016, 19(4), 746. 9 Cao M L, Xu L, Zhang C. Journal of the Chinese Ceramic Society, 2015, 43(5), 632 (in Chinese). 曹明莉, 许玲, 张聪. 硅酸盐学报, 2015, 43(5), 632. 10 Ma H Q, Cheng Y, Wu C. Construction and Building Materials, 2021, 287, 122719. 11 Kan L L, Zhang Z, Zhang L, et al. Engineering Mechanics, 2019, 36(11), 121 (in Chinese). 阚黎黎, 章志, 张利, 等. 工程力学, 2019, 36(11), 121. 12 Chen Y, Zhang H M. Structural Engineers, 2017, 33(3), 208 (in Chinese). 陈杨, 章红梅. 结构工程师, 2017, 33(3), 208. 13 Du W P, Yang C Q, Wu C. Materials Reports, 2021, 35(4), 67 (in Chinese). 杜文平, 杨才千, 王冲. 材料导报, 2021, 35(4), 67. 14 Fan J S, Liu R R, Zhang J, et al. China Civil Engineering Journal, 2021, 54(4), 54 (in Chinese). 樊健生, 刘入瑞, 张君, 等. 土木工程学报, 2021, 54(4), 54. 15 Lu J H, Zhang X F, Xu S L. Shui Li Xue Bao, 2012, 43(S1), 135 (in Chinese). 路建华, 张秀芳, 徐世烺. 水利学报, 2012, 43(S1), 135. 16 Xu S L, Cai X H. China Civil Engineering Journal, 2011, 44(5), 79 (in Chinese). 徐世烺, 蔡新华. 土木工程学报, 2011, 44(5), 79. 17 Li F H, Feng Z H, Deng K L, et al. Engineering Structures, 2019, 195, 223. 18 Zhang Q T, Xiao J Z, Zhang P, et al. Construction and Building Mate-rials, 2019, 229, 117050. 19 Ye B B, Han J G, Pan P, et al. Acta Materiae Compositae Sinica, 2019, 36(1), 245 (in Chinese). 叶斌斌, 韩建国, 潘鹏, 等. 复合材料学报, 2019, 36(1), 245. 20 Ye B B, Zhang Y T, Han J G, et al. Construction and Building Mate-rials, 2019, 226, 899. 21 Jiang S Y, Gong H W, Yao W L, et al. Materials Reports, 2018, 32(12), 4190 (in Chinese). 江世永, 龚宏伟, 姚未来, 等. 材料导报, 2018, 32(12), 4190. 22 Qiao Z, Pan Z F, Leung C K Y, et al. Journal of Southeast University (Natural Science), 2017, 47(4), 724 (in Chinese). 乔治, 潘钻峰, 梁坚凝, 等. 东南大学学报 (自然科学版), 2017, 47(4), 724.