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王   伟¹ , 刘翼志²

 

(1. 黄河三角洲农业高新技术产业示范区产业推进服务中心 , 东营   257091;

2. 河北省建筑工程质量检测中心有限公司 , 石家庄   050200)

摘  要: 为提升剪力墙水平接缝受力性能 , 针对接缝键槽混凝土承压及抗剪薄弱问题 , 通过控制变量试验 ,系统探究了不同混凝土强度 、界面接缝剂类型及钢筋配置对接缝键槽混凝土力学性能的影响规律 。研究设计并制作了 12 组试件 , 分别进行抗压与抗剪试验 。结果表明 : 提高混凝土强度能有效增强极限承载力 , 使用 A 类剂时 , C60 试件极限抗压与抗剪强度较 C40 分别提升 36. 21%、58. 39% ; 高性能接缝剂显著改善了抗剪延性 , 不同混凝土等级下  (C40、C50、C60) 峰值抗剪位移分别提高 38. 60%、42. 19%、24. 26% ; 高强钢筋  (HRB500) 与较大直径  (14 mm) 对约束混凝土 、抑制裂缝发展作用明显 。基于试验结果 , 提出了 3 种综合构造优化设计 , 优化后试件的极限抗压强度 、抗剪强度分别提升 18. 49%和 22. 04% , 有效改善了接缝的脆性破坏倾向与整体性能 ,研究结果为装配式剪力墙水平接缝键槽的设计提供了重要的试验依据和数据支撑。

关键词: 剪力墙水平接缝 ; 键槽 ; 混凝土材料 ; 力学性能试验 ; 抗压与抗剪 ; 构造优化

中图分类号: TU375      文献标志码: A      文章编号: 1005-8249 (2026) 04-0056-08

DOI:10. 19860/j. cnki. issn1005-8249. 2026. 04. 009

 

Experimental Study on the Mechanical Properties of Concrete at

Horizontal Joints of Shear Walls and Structural Optimization

WANG Wei¹ , LIU Yizhi²

(1. Industrial Promotion Service Center of the Yellow River Delta Agricultural High-tech

Industry Demonstration Zone, Dongying 257091, China;

2. Hebei Province Construction Engineering Quality Testing Center Co. , Ltd. ,

Shijiazhuang 050200, China)

Abstract : To improve the stress performance of horizontal joints in shear walls, addressing the issues of weak bearing and shear resistance in joint keyway concrete, a systematic study was conducted through controlled variable experiments to explore the effects of different concrete strengths, types of interface joint agents, and reinforcement configurations on the mechanical properties of joint keyway concrete. Twelve groups of specimens were designed and fabricated for compressive and shear tests. The results indicate that increasing concrete strength can effectively enhance ultimate load capacity; for C60 specimens using type A agent, the ultimate compressive and shear strengths increased by 36. 21% and 58. 39% , respectively, compared with C40 specimens. High-performance joint agents significantly improved shear ductility, with peak shear displacement increasing by 38. 60% , 42. 19% , and 24. 26% across different concrete grades (C40-C60). High-strength reinforcement (HRB500) and larger diameters ( 14mm) noticeably contributed to constraining the concrete and inhibiting crack development.  Based on the experimental results, three comprehensive structural optimization designs were proposed.  After optimization, the ultimate compressive and shear strengths of the specimens increased by 18. 49% and 22. 04% , respectively, effectively improving the brittleness tendency and overall performance of the joints. The research results provide important experimental evidence and data support for the design of keyways in horizontal joints of prefabricated shear walls.

Key words: shear wall horizontal joints; keyways; concrete materials; mechanical property tests; compressive and shear strength; structural optimization