钢筋套筒灌浆连接受拉性能数值模拟
周文轩

上海公路桥梁（集团）有限公司，上海 200433

钢筋套筒;受拉性能;单调拉伸;灌浆缺陷

Numerical Sulation of Tensile Behavior of Steel Sleeve Grouting Connection
ZHOU Wenxuan

Shanghai Road and Bridge（Group）Co.， Ltd.， Shanghai 200433， China

Steel sleeve;Tensile property;Monotonic stretching;Grouting defects

DOI: 10.13512/j.hndz.2022.01.17

备注

套筒灌浆连接是装配式建筑竖向预制构件连接的主要形式。为深入研究钢筋套筒灌浆连接的受拉性能，通过ABAQUS建立了4组三维钢筋套筒有限元模型，并进行了单调拉伸试验模拟，模拟结果与实验结果基本吻合，验证了模型的可靠性。最后，基于有限元模型模拟研究了灌浆缺陷对钢筋套筒受拉性能的影响。研究结果表明：混凝土塑性损伤模型可以较好的模拟灌浆料的本构模型；钢筋套筒在单向拉伸试验模拟中荷载位移曲线呈现与钢筋单向拉伸相似的变化趋势；钢筋套筒使用HRB500钢筋的连接性能优于HRB400钢筋，可以承受更大的拉拔力；灌浆缺陷会降低钢筋套筒的受拉性能，当钢筋的锚固长度小于等于5d后，在模拟过程中，钢筋和灌浆料之间产生明显的滑移现象，使得钢筋套筒发生钢筋拔出破坏。
Sleeve grouting connection is the main form of vertical prefabricated component connection in prefabricated buildings. In order to further study the tensile behavior of steel sleeve grouting connection， four groups of three-dimensional finite element models of steel sleeve are established by ABAQUS，and the monotonic tensile test simulation is carried out. The simulation results are basically consistent with the experimental results， which verifies the reliability of the model. Finally， based on the finite element model， the influence of grouting defects on the tensile properties of steel sleeve is studied. The results show that the plastic damage model of concrete can simulate the constitutive model of grouting material well；The load displacement curve of steel sleeve in the uniaxial tensile test simulation is similar to that of steel；the connection performance of HRB500 steel bar is better than HRB400 steel bar，and it can bear larger pull-out force；grouting defects will reduce the mechanical properties of the steel sleeve. When the anchorage length of the reinforcement is less than or equal to 5 d，there is obvious slip between the reinforcement and the grouting material in the simulation process，which makes the steel sleeve pull out.
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