摘要
对基于500 MPa钢筋的高强套筒灌浆连接各主要影响因素进行总结,并详细分析其受力原理。设计17个考虑套筒厚度、锚固长度、环肋数量和灌浆料强度的分析模型,并采用校正的有限元法进行详细分析。结果表明:基于已有的Ⅰ级接头强度理论、钢筋与灌浆料黏结理论所得套筒厚度和锚固长度值均偏小,建议分别取4 mm和7d;增大环肋数量可提高套筒与灌浆料间的黏结作用和减小两者间的滑移,但考虑加工难度建议取8~16个;增大灌浆料强度可提高连接的强度和减小其塑性变形,以及明显减小灌浆料的损伤,设计时建议取120 MPa。
In this paper, a new type of high strength sleeve grouting connection was developed based on 500 MPa reinforcement, and the main influencing factors and mechanical principle were summarized and analyzed in detail.Seventeen models were designed considering the sleeve thickness, anchorage length, ring number, and grouting material strength, and the mechanical properties were studied by the corrected finite element analysis method.The results showed that the Ⅰ level existing strength theory, and bonding theory between reinforcement and grouting material of sleeve grouting connection were a little conservative, the values of 4 mm and 7d were suggested.Moreover, with the ring number increasing, the bonding force between sleeve and grouting material increased, while the slip value decreased, and the ring number was suggested to be 8-16 to consider the effect of complex machining.In addition, after increasing the strength of grouting material, the strength of high strength sleeve grouting connection can be effectively improved, and the plastic deformation of the connection and damage of grouting material will be decreased, so the 120 MPa of grouting material was the most effective.
作者
刘鑫宇
曾思智
朱春晖
胡淑军
梁文沁
LIU Xinyu;ZENG Sizhi;ZHU Chunhui;HU Shujun;LIANG Wenqin(School of Infrastructure Engineering,Nanchang University,Nanchang 330031,China;Zhongmei Engineering Group Ltd,Nanchang 330001,China;Ganzhou Construction Industrialization Group Co.,LTD,Ganzhou 341007,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China)
出处
《南昌大学学报（工科版）》
CAS
2022年第4期335-343,共9页
Journal of Nanchang University(Engineering & Technology)
基金
国家自然科学基金项目(51908268)
江西省地质局科技研究项目(2022JXDZKJKY10)
江西省研究生创新专项资金立项项目(YC2021-S140)。
关键词
高强套筒灌浆连接
500
MPa钢筋
灌浆料强度
环肋数量
锚固长度
high strength sleeve grouting connection
500 MPa reinforcement
grouting material
ring number
anchorage length
