Study on Force Characteristics and Optimization of Roller-type Anchorage Cable Saddle
The finite element analysis method is employed to conduct an in-depth study on the force characteristics of the roller-type anchorage cable saddle in suspension bridges.The results indicate that the roller contact reaction force exhibits a serrated distribution in the longitudinal direction of the bridge,while the maximum contact stress occurs at the central position in the transverse direction,which is closely related to the distribution of transverse and longitudinal ribs of the anchorage cable saddle.After structural optimization,the variation ranges of both the roller contact reaction force and the transverse contact stress are significantly reduced.Furthermore,the maximum shear stress and von Mises stress are found to occur at a depth of approximately 3 mm below the roller contact surface,which is consistent with Hertzian contact theory.Based on these findings,it is recommended to use quenched and tempered alloy steel as the roller material and to design the material yield strength and surface hardness according to different types of maximum stress values.This study provides an important theoretical basis for the design and optimization of roller-type anchorage cable saddles in suspension bridges.
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