海上风机单桩结构灌浆连接段试验有限元模拟

Finite Element Simulation of Grouted Connection Tests for Offshore Wind Turbine Monopile Structures

灌浆连接段是海上风机单桩支撑结构的重要组成部分。简单回顾单桩结构灌浆连接段试件的四点弯曲疲劳试验和疲劳后轴压试验,并针对试验中的典型试件进行非线性有限元数值模拟。建立灌浆连接段的三维实体单元模型,考虑灌浆材料与钢管的接触,并采用混凝土塑性损伤(Concrete Damage Plasticity, CDP)模型模拟灌浆材料的性能。模拟结果显示,提出的有限元模型能较好地模拟灌浆连接段在四点弯曲和轴压荷载下的性能,可供未来的有限元参数研究参考。

Grouted connection(GC) is the critical part of the monopile offshore wind turbine structures. This paper presents the main results of the earlier fatigue bending tests and the residual axial compression test after fatigue bending. On this basis, the non-linear finite element studies are carried out on the typical specimens of these two tests. 3D finite element models are built with the consideration of the interactions between the grout material and the steel tubes and the concrete damage plasticity(CDP) model is used to simulate the performance of grout material. The result shows that the proposed finite element model can represent the behavior of the grouted connections under four-point bending and axial compression loads, which provides reference for the future finite element parametric studies.