Elastic Stress Distribution Characteristics in the Anchorage Section Considering Anchor Cable Morphology

The prestressed anchor cable is widely used in foundation pit engineering, but its universal bending shape in the anchorage section will significantly affect the load transfer and stress distribution. Based on Cox’s shear-lag model, this paper presents a theoretical analysis of the load transfer behavior at the anchor cable–grout interface and establishes an elastic distribution model of axial force and shear stress that accounts for the anchor cable shape. Furthermore, the influence of cable shape on the elastic stress distribution in the anchorage section under different load conditions, different anchorage lengths, and different bending radii is compared and analyzed. Finally, through a comparative analysis between the model calculation results and experimental data, the proposed distribution model shows good agreement with the experimental results. The findings reveal the evolution of the elastic stress distribution in the anchorage section under different cable shapes and provide a theoretical reference for the axial force loss of prestressed anchor cables in service.