玻璃纤维增强塑料锚杆粘结性能研究

Research on the bond behavior of a glass-fiber-reinforced plastic bolt

为了研究玻璃纤维增强塑料GFRP(glass fiber reinforced plastic)锚杆的粘结性能,对GFRP锚杆轴向传力机理进行了研究,基于Mindlin位移解,得到GFRP锚杆的剪应力和轴应力的计算公式。利用MATLAB软件编制程序得到GFRP锚杆的剪应力及轴力沿杆体轴向方向的分布曲线。通过现场拉拔试验结合有限元分析软件ANSYS建模分析结果,得到了GFRP锚杆的剪应力、轴力沿杆体分布规律以及锚杆的粘结-滑移曲线,试验值与有限分析结果及理论计算值基本吻合,验证了有限元分析与理论推导的准确性。该研究为GFRP锚杆的设计和工程应用提供理论依据。

To study the bonding performance of a glass-fiber-reinforced plastic （GFRP） bolt, its force transmission mechanism is analyzed. Moreover, based on the Mindlin solution, a formula for the calculation of shear stress and axial stress is proposed. The distribution curves of the shear stress and axial force along the axial direction of the GFRP bolt were obtained using MATLAB. The distribution laws of shear stress and axial force of the GFRP bolt and the bond slip curve were obtained by pull-out tests and finite element analysis using ANSYS software. The experi-mental results are consistent with the finite element analysis results and the the oretical calculation results, and theaccuracy of the finite element analysis and the theoretical derivation is verified. Thus, a theoretical basis for the de-sign and engineering application of GFRP bolts is provided.