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EXPERIMENTAL STUDY ON MECHANICAL PROPERTIES OF SLEEVE SPLICING GROUTED WITH PVA FIBER-REINFORCED CEMENTITIOUS COMPOSITES
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摘要: 通过对6个中心拉拔试件和27个灌浆套筒接头试件的单向拉伸试验，分析聚乙烯醇（PVA）纤维、钢筋锚固长度以及有无约束对灌浆套筒接头受力性能的影响。结果表明：PVA纤维能够提高无约束状态钢筋与灌浆料的黏结强度，对套筒约束状态接头连接性能影响不明显。增加钢筋锚固长度，接头连接刚度越大，荷载滑移曲线发展越平稳。当灌浆料强度达到85~90 MPa时，锚固长度为6倍钢筋直径即可满足接头强度要求。套筒约束能够提高套筒与灌浆料和钢筋之间的黏结强度。Abstract: According to test results of pull-out tests for 6 specimens and uniaxial tensile tests for 27 grouted sleeve-splicing specimens,the influences of PVA fiber, anchorage length of rebars and with or without confines of grouted sleeves on splicing were analyzed. The results showed that the addition of PVA fiber could improve the bonding strength between the unconfined rebars and grouting materials, but had not obvious impact on the properties of grouted sleeve splicing. The rigidity of grouted sleeve splicing increased with the increase of anchorage length and the load-displacement curves was also more smoother. When the strength of the grouting materials was up to 85 to 90 MPa, the anchorage length of six times diameter of rebars could well meet the strength requirement of the grouted sleeve splicing. The constraint of sleeves could improve the bonding strength of the sleeves, grouting materials and rebars.
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汪杰,李宁,江韩,等. 装配式混凝土建筑设计与应用[M]. 南京:东南大学出版社,2018. ALIAS A,ZUBIR M A,SHAHID K A,et al.Structural Performance of Grouted Sleeve Connectors with and Without Transverse Reinforcement for Precast Concrete Structure[J]. Procedia Engineering, 2013, 53(7):116-123. 许成顺, 刘洪涛, 杜修力. 高应力反复拉压作用下钢筋套筒灌浆连接性能试验研究[J]. 建筑结构学报,2018,39(12):178-184,193. KIM Y. A Study of Pipe Splice Sleeves for Use in Precast Beam-Column Connections[D]. Austin:University of Texas at Austin, 2000. EINEA A, YAMANE T, TADROS M K. Grout-Filled Pipe Splices for Precast Concrete Construction[J]. PCI Journal, 1995, 40(1):82-93. 郑和晖,明阳,田飞,等. 组合梁钢混连接用纤维灌浆料制备及灌注工艺试验研究[J].施工技术,2019,48(5):58-60,114. 朱清华, 郝敏, 郝志强,等. 聚乙烯醇纤维增强水泥基套筒灌浆料的性能研究[J]. 新型建筑材料, 2018(10):26-28. 中华人民共和国住房和城乡建设部.钢筋套筒灌浆连接应用技术规程:JGJ 355-2015[S]. 北京:中华人民共和国中国建筑工业出版社, 2015. 国家质量监督局.水泥胶砂强度检验方法:GB/T 17671-1999[S]. 北京:国家质量技术监督局, 1999. 郑永峰. GDPS灌浆套筒钢筋连接技术研究[D]. 南京:东南大学, 2016. 李向民, 高润东,许清风,等. 灌浆缺陷对钢筋套筒灌浆连接接头强度影响的试验研究[J]. 建筑结构,2018,48(7):52-56. -
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