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。
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.
作者
杨一洲
赵军
Yang Yizhou;ZHAO Jun(School of Civil Engineering and Architecture,Guilin University of Science and Technology,Guilin 541004;Guangxi Key Laboratory for Building New Energy and Energy Conservation,Guilin University of Technology,Guilin 541004)
出处
《土工基础》
2022年第4期564-567,共4页
Soil Engineering and Foundation
基金
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)。
关键词
灌浆套筒
粘结强度
灌浆缺陷
有限元分析
Grouting Sleeve
Bond Strength
Grouting Defects
Finite Element Analysis
