土木与环境工程学报（中英文）2024，Vol.46Issue(2)：108-116,9.DOI:10.11835/j.issn.2096-6717.2022.056
考虑灌浆料龄期的钢筋-金属波纹管浆锚连接锚固性能试验研究
Experimental study on anchorage property of rebar-metallic bellows slurry anchor connection considering grout age
摘要
Abstract
In order to study the anchorage property of rebar-metallic bellows slurry anchor connection,18 groups of connection specimens were designed and fabricated in this study,and the pull-out tests were completed.The influences of anchorage length la,grouting material curing age T and spiral confinement on the anchorage property of the connection were analyzed based on the test results.The experimental results show that all the anchored rebars had undergone integral elastic stage and yielding stage,and the ultimate performance of specimens were bond slip failure and rebar fracture.When T=3 d,bond-slip failure occurred in all specimens.When T=7 d and la≥13d,rebars fractured.When T=28 d,specimens whose la=7d without stirrup and la=5d with stirrup began to failure of rebar fracture.With application of spiral confinement and the increase of anchorage length and grout age,the ultimate strength of specimens increased first and then approached to the tensile strength of rebar,the maximum sliding displacement of rebars in the elastic stage decreased significantly,the initial stiffness of specimens increased,and anchorage property improved significantly.In engineering practice,when D/d≥2.6,the anchorage length should be greater than 13d to ensure the anchorage performance of 3 d and 7 d.In order to fully exert its mechanical properties in normal work stage,anchorage length is prohibited to be less than 10d.关键词
浆锚连接/锚固性能/金属波纹管/锚固长度/灌浆料龄期/螺旋箍筋约束Key words
slurry anchor connection/anchorage property/metallic bellows/anchorage length/grout age/spiral confinement分类
建筑与水利引用本文复制引用
郭家旭,胡少伟,齐浩,聂影,陶修,赵轩,罗李鹏..考虑灌浆料龄期的钢筋-金属波纹管浆锚连接锚固性能试验研究[J].土木与环境工程学报（中英文）,2024,46(2):108-116,9.基金项目
重庆市技术创新与应用发展专项(cstc2019jscx-gksbX0013) （cstc2019jscx-gksbX0013）
国家自然科学基金(52130901) （52130901）
重庆市自然科学基金创新群体科学基金(cstc2020jcyj-cxttX0003) Technology Innovation and Application Development Project of Chongqing(No.cstc2019jscx-gksbX0013) （cstc2020jcyj-cxttX0003）
National Natural Science Foundation of China(No.52130901) （No.52130901）
Innovation Group Science Fundation of the Natural Science Fundation of Chongqing(No.cstc2020jcyj-cxttX0003) （No.cstc2020jcyj-cxttX0003）
