Research on distribution of shear stress and length of anchorage end of prestressed cable

Model research on distribution regularity of shear stress on anchorage end of prestressed cable is carried out according to half space with concentrated force in normal direction on boundary based on the elastic theory. By analyzing the distribution characteristics of shear stress in practical engineering and field experiment, the distribution regularity of shear stress on anchorage end can be modeled with the introduction to parameter ? which is correlated to prestress, length of anchorage end, rock strength, and cementation strength and parameter ? which is correlated to the position of peak shear stress and the diameter of anchorage end. Ultimate bearing capacity can be calculated according to compression strength ?c and internal friction angle ? of cementation material and the approximately linear inverse proportion relation. Meanwhile, the design length of anchorage Ld multiplied by 2tan? makes the practical length of anchorage end Ls which is calculated by the paper’s method. Finally, two cases calculation and analysis show that the research production is reasonable.