INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Experimental Study on Effect of Different Grouting Fullness on Connection Performance of Half Thread End Grouted Splicing Under Reversal Load |
MAO Shiyang, SUN Bin, OUYANG Zhipeng, WANG Ni, ZHANG Renyu
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China Academy of Building Research, Beijing 100013, China |
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Abstract In order to study the influence of different fullness on the connection performance of sleeve grouting joint under earthquake action, four grades of grouting fullness of half thread end grouted splicing specimens were designed for reversal loading. The results show that with the decrease of grouting fullness, under reversal load, the failure mode of specimens transform from the steel bar fracture to the grouting end pull-out, and the tensile strength will decrease. Under reversal load, the reduction of grouting fullness leads to increasing the residual deformation and reducing the tangential tensile stiffness of the specimens which is harmful to control of the cracks in concrete structure and increases the degree of damage in the joint areas after the earthquake. For the specimens subjected to high stress reversal load, the capacity of energy consumption increases slightly due to the decrease of grouting fullness and the increase of the slip; for the specimens subjected to large strain reversal load, the capacity of energy consumption reaches the limit in advance due to the decrease of grouting fullness, which reduces the safety redundancy of the splicing. It is verified by the experiment that the construction defects weaken the connection performance of the half thread end grouted splicing and danger to the safety of the joint under earthquake.
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Published: 23 February 2021
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Fund:This work was financially supported by the National Key R&D Program of China (2016YFC0701800) and Youth Fund of China Academy of Building Research (20190112331030019). |
Corresponding Authors:
maoshiyang89@126.com
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About author:: Shiyang Mao received his M.S. degrees in June 2015 from Beijing University of Technology in civil enginee-ring. From June 2015 to now, he is an engineer in China Academy of Building Research (CABR) and focusing on the research of connection performance in precast structure. |
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1 Wu Xiaobao,Lin Feng,Wang Tao. Building Structure, 2013,43(14),77(in Chinese). 吴小宝,林峰,王涛. 建筑结构,2013,43(14),77. 2 Ling J H, Rahman A B A, Ibrahim I S, et al.Construction and Building Materials, 2012, 33,90. 3 Zheng Y F,Guo Z X,Sun Z C. Construction Technology, 2014,43(22),40(in Chinese). 郑永峰,郭正兴,孙志成. 施工技术,2014,43(22),40. 4 Zheng Y F,Guo Z X,Cao J. Journal of Harbin Institute of Technology, 2015, 47(12),106(in Chinese). 郑永峰, 郭正兴, 曹江. 哈尔滨工业大学学报, 2015, 47(12),106. 5 Lu Z, Huang J, Li Y, et al.Engineering Structures, 2019, 186,421. 6 Zheng Q L,Wang N,Tao L, et al. Building Science, 2017,33(5),61(in Chinese). 郑清林,王霓,陶里,等.建筑科学,2017,33(5),61. 7 Li X M,Gao R D,Xu Q F, et al. Building Structure, 2018,48(7),52(in Chinses). 李向民,高润东,许清风,等. 建筑结构,2018,48(7),52. 8 Xu C S, Liu H T, Du X L. Journal of Building Structures, 2018,39(12),178(in Chinese). 许成顺,刘洪涛,杜修力. 建筑结构学报,2018,39(12),178. 9 Malvar L J.ACI Materials Journal, 1992, 89(6),593. 10 Darwin D, Zavaregh S S. ACI Structural Journal, 1993, 93(4), 486 11 Ameli M J, Pantelides C P. Journal of Structural Engineering, 2016, 143(2),04016176.1. |
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