带肋钢筋套筒灌浆连接破坏过程的有限元分析  

Finite element analysis of damage process of grouted sleeve connections with ribbed reinforcing bars

作　　者：郎圣淳 严晓东[1] LANG Shengchun;YAN Xiaodong(School of Civil&Environmental Engineering and Geography Science,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学土木工程与地理环境学院,浙江宁波315211

出　　处：《宁波大学学报(理工版)》2025年第1期37-44,共8页Journal of Ningbo University:Natural Science and Engineering Edition

基　　金：国家自然科学基金(52378162)。

摘　　要：为揭示套筒灌浆连接接头的细观工作机理,采用ABAQUS软件建立接头三维精细化有限元模型,模拟接头内部灌浆料的开裂和破坏过程,分析造成不同破坏模式的主要原因.结果表明,钢筋锚固区灌浆料的裂缝呈现45°夹角分布,在套筒端发生较为严重的楔形破坏,纯灌浆段有水平贯穿裂缝;增大钢筋锚固长度能够减小纯灌浆段水平贯穿裂缝的数量;钢筋肋间灌浆料的受压情况决定套筒灌浆接头最终的破坏模式;利用新模型能够准确反映接头的破坏模式和荷载—位移曲线.In order to reveal the fine working mechanism of the grouted sleeve connections,a three-dimensional refined finite element model was established in ABAQUS to analyze the cracking and destruction process of the grout,and to study the main reasons for the different destruction modes.The results show that the cracks in the grouting material at the steel bar anchorage zone exhibited a 45°angle distribution,and severe wedge-shaped damage occurred at the sleeve end.There were horizontal penetrating cracks in the pure grouting section,and their number can be reduced by increasing the anchorage length of steel bars.The compression condition of the grouting material between the steel bars determines the final failure mode of the grouted sleeve connections.The presented model can accurately demonstrate the damage mode and load displacement curve of the grouted sleeve connections.

关 键 词：有限元分析 套筒灌浆连接 破坏模式 裂缝开展 黏结强度 

分 类 号：TU375[建筑科学—结构工程]