土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (4): 564-567.

• 专题论述 • 上一篇    下一篇

基于ABAQUS的内部灌浆缺陷灌浆套筒的强度分析

杨一洲1，赵 军1,2   

  1. （1.桂林理工大学土木与建筑工程学院，广西桂林 541004；2.桂林理工大学广西建筑新能源与节能重点实验室，广西桂林 541004）
  • 收稿日期:2022-01-27 修回日期:2022-02-04 出版日期:2022-08-30 发布日期:2022-08-25
  • 通讯作者: 赵 军（1970-），男，工学博士，教授，研究方向为复杂结构可靠性分析、装配式建筑。
  • 作者简介:杨一洲（1996-），男，硕士研究生，研究方向为结构可靠性分析、预制装配式建筑。 
  • 基金资助:
    国家自然科学基金项目(52068016)；广西建筑新能源与节能重点实验室（桂科能J-21-23、桂科能J-21-25）

Strength Analysis of Grouting Sleeve and Internal Grouting Defect Using ABAQUS Software

Yang Yizhou1， ZHAO Jun1,2   

  1. （1.School of Civil Engineering and Architecture, Guilin University of Science and Technology, Guilin 541004；
    2.Guangxi Key Laboratory for Building New Energy and Energy Conservation, Guilin University of Technology, Guilin 541004）
  • Received:2022-01-27 Revised:2022-02-04 Online:2022-08-30 Published:2022-08-25

摘要： 针对装配式建筑实际施工过程中各种施工原因造成灌浆缺陷的现象，对用于连接钢筋直径为40 mm的灌浆套筒进行有限元分析。利用有限元软件建立内部存在缺陷的套筒模型，通过试验值对粘结滑移参数进行修正，并对试件进行单调轴向拉伸模拟试验。研究表明：内部存在缺陷钢筋～灌浆料粘结强度的折减系数为0.84；模拟的破坏形式与试验结果较为一致，荷载～位移曲线与试验结果吻合较好；灌浆料模型的应力集中区域与试验中灌浆料破坏区域基本一致，应力分布规律合理，为实际工程应用做出指导作用。

关键词: 灌浆套筒, 粘结强度, 灌浆缺陷, 有限元分析

Abstract: The grouting induced defects are frequently encountered in prefabricated building projects. This paper presents the finite element analysis results on the grouting sleeve with a diameter of 40 mm for connecting the reinforcement bars. The finite element analysis software ABAQUS was used to establish the numerical grouting sleeve model with internal grouting defects. In the contact properties between the reinforcement and the grouting material, the bond slip parameters were modified to conduct unidirectional tensile simulation analysis. The analytical results show that the reduction coefficient of bond strength between the reinforcement and the grouting material is 0.84 with grouting defects inside the sleeve. The failure mode resulted from the numerical analysis is consistent with the test results. The ultimate bearing capacity is accurate, and the load-displacement curve demonstrates a good agreement with the test results. The stress concentration area of the grouting material model is basically the same as the failure area of the grouting material in the test. The stress distribution pattern is reasonable, which would provide a reference for similar engineering practice.

Key words: Grouting Sleeve, Bond Strength, Grouting Defects, Finite Element Analysis

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