无剪力键灌浆连接段粘结行为数值模拟研究

Research on Numerical Simulation of Cohesive Behavior in Shearkey-Less Grouted Connection

[目的]海上风电基础结构中灌浆连接段行为复杂,特别是灌浆料与钢管的相互作用对整体性能至关重要。[方法]介绍和分析粘聚力模型模拟界面行为属性设定,从粘聚力模型粘结行为、界面损伤判定准则和界面损伤演化准则介绍粘聚力模型理论;并结合某典型无剪力键灌浆连接段实例,介绍了建模方法中的常规设置及粘聚力模型接触设置方法。[结果]通过分析,验证了粘聚力模型粘结行为在ABAQUS中实现的可行性。[结论]所述的粘聚力模型能够很好地模拟出钢质筒壁和灌浆体的协同变形情况、钢质筒壁的Mises应力分布情况、灌浆体的Tresca应力分布情况和荷载位移曲线。

[Introduction]Grouted connections of offshore wind foundation structures exhibit complicated behavior,and in particular,the interaction between grouted material and steel pipe is crucial to the overall performance.[Method]This paper mainly introduced and analyzed the behavior attribute configuration on the simulation interface of the cohesive model.Cohesive model theory was introduced in terms of cohesive behavior of cohesive model,criteria for interface damage judgment and criteria for interface damage evolution.Based on a typical shearkey-less grouted connection,conventional configuration during modeling and contact configuration of cohesive model were introduced.[Result]Through analysis,the feasibility of implementing cohesive behavior in the cohesive model in ABAQUS is proven.[Conclusion]The cohesive model proposed by this paper can simulate the collaborative deformation of steel cylinder wall and grouting body,Mises stress distribution of the steel cylinder wall,Tresca stress distribution of the grouting body and load-displacement curve well.