半灌浆套筒连接件抗拉伸性能有限元研究  

Finite element study on tensile performance of partially grouted sleeve connections

作　　者：胡少华 王英涛 HU Shaohua;WANG Yingtao(School of Transportation,Civil Engineering&Architecture,Foshan University,Foshan 528225,China)

机构地区：[1]佛山科学技术学院交通与土木建筑学院,广东佛山528225

出　　处：《佛山科学技术学院学报（自然科学版）》2024年第2期53-61,共9页Journal of Foshan University(Natural Science Edition)

基　　金：佛山科学技术学院学生学术基金资助项目(xsjj202211kjb05)。

摘　　要：为了研究半灌浆套筒连接件的抗拉伸性能,采用数字建模方法建立半灌浆套筒有限元模型,研究了钢筋直径、灌浆料强度、钢筋锚固长度、钢筋偏置缺陷等参数的影响规律。研究结果表明,所建立有限元模型能很好地模拟半灌浆套筒连接件的拉伸全过程,且分析结果与试验结果较吻合;随着钢筋直径的增大,半灌浆套筒连接件的极限荷载值和极限位移值均增大;当钢筋锚固缺陷大于2 d时,灌浆料与混凝土间将产生粘结滑移,为防止灌浆料被压碎,建议灌浆料强度应大于100 MPa;钢筋偏置缺陷导致连接件强化阶段荷载值略微降低,沿钢筋受力方向的应力值增大。To investigate the tensile performance of a partially grouted sleeve connection,a finite element model of the connection was created using ABAQUS software.The effects of parameters including rebar diameter,grout strength,insufficient anchorage length,and eccentric placement of reinforcement were studied.The research results show that the established finite element model can effectively simulate the entire tensile process of the partially grouted sleeve connection,and the analysis results are in good agreement with experimental results.With increasing rebar diameter,both the ultimate load capacity and ultimate displacement of the partially grouted sleeve connection increase.When the anchorage defect of the rebar is greater than 2 times its diameter(2 d),there will be bond slip between the grout and concrete.To prevent the crushing of grout,it is recommended that the grout strength should be greater than 100 MPa.The value of stress at the strengthening phase slightly reduces along the direction of the reinforcement for the sleeve connection with the eccentric placement of reinforcement.

关 键 词：半灌浆套筒 抗拉伸性能 有限元分析 破坏形式 

分 类 号：TU758.12[建筑科学—建筑技术科学]