| 引用本文: | 魏嘉奇,李明越,姜洪斌.钢筋螺旋肋灌浆套筒连接性能试验分析[J].哈尔滨工业大学学报,2025,57(1):110.DOI:10.11918/202402022 |
| WEI Jiaqi,LI Mingyue,JIANG Hongbin.Reinforcing steel spiral rib grouting sleeve connection performance test[J].Journal of Harbin Institute of Technology,2025,57(1):110.DOI:10.11918/202402022 |
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| 摘要: |
| 传统灌浆套筒制造过程繁琐、原材料成本高且灌浆质量难以保证,限制了中国预制装配式建筑的推广。为促进建筑行业的经济、环保和高效发展,本课题组研发了一种新型钢筋灌浆套筒连接技术,采用了“滚压螺旋肋灌浆套筒”和“类宾汉流体灌浆料”,钢筋与灌浆料、灌浆料与套筒之间形成了更加紧密的机械锁合,显著提高了构件连接后的承载力。该技术具有成本低廉、施工简便、灌浆质量易于保证等优点。为了探究该连接体系下钢筋的最小锚固长度及钢筋对中对接与偏置对接在连接性能上的差异,通过对34个接头试件进行单向拉伸试验,分析了试件的破坏模式及各项结构性能指标。研究结果表明:钢筋在套筒内部偏置对接与对中对接在连接性能上差别不大；滚压套筒内的内凸肋显著增强了对灌浆料滑移的阻抗作用,可提供足够的黏结锚固以达到连接性能要求。初步结果显示,在该连接方式下钢筋的最小锚固长度可采用10倍钢筋直径,并采用偏置对接方式。 |
| 关键词: 螺旋肋灌浆套筒 钢筋偏置对接 单拉试验 锚固长度 黏结强度 |
| DOI：10.11918/202402022 |
| 分类号:TU317.1；TU375 |
| 文献标识码:A |
| 基金项目:国家重点研发计划(MB20160139) |
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| Reinforcing steel spiral rib grouting sleeve connection performance test |
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WEI Jiaqi1,2,LI Mingyue1,JIANG Hongbin1,2
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(1.School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; 2.Key Lab of Structures Dynamic Behavior and Control(Harbin Institute of Technology), Ministry of Education, Harbin 150090, China)
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| Abstract: |
| The traditional grouting sleeve manufacturing process is hindered by its complexity, high raw material costs, and challenges in ensuring grouting quality, which has restricted the widespread adoption of prefabricated assembly buildings in China. To address these issues and promote economical, environmentally friendly, and efficient development in the construction industry, an innovative steel grouting sleeve connection technology was developed. This new approach employs a “rolled spiral rib grouting sleeve” in combination with “Bingham-like fluid grout,” which creates a more secure mechanical interlock between the reinforcement bar and grout, as well as between the grout and sleeve. This enhanced interlocking mechanism significantly improves the load-bearing capacity of connected components. The developed technology offers several advantages, including costs reduced, construction processes simplified, and grouting quality assurance improved. To determine the minimum anchorage length of reinforcement bars within this connection system and to compare the connection performance between centered and offset butt joints, unidirectional tensile tests on 34 joint specimens were conducted, and the damage modes and various structural performance indices of the specimens were thoroughly analyzed. The results indicate that the differences in connection performance is minimal between offset and centered butt joints within the sleeve. Additionally, the internal convex ribs within the rolled sleeve significantly enhance grout slip resistance and provide sufficient bond anchorage to meet connection performance requirements. Preliminary findings suggest that the minimum anchorage length of the reinforcement in this proposed connection system can be as short as 10 times the diameter of the reinforcement for offset butt joints. |
| Key words: spiral rib grouting sleeve rebar offset docking unidirectional tensile test anchor length bond strength |
