Abstract
In this paper, deformations and stresses of a hook bolt, anchoring railroad track on a railway bridge, are analyzed both experimentally and theoretically. When a train passes through on a railway, dynamic load act on the hook bolts which are settled to fix a rail to a sleeper. Thus, repeated passing of the train may cause fatigue fracture of the hook bolt. Therefore, analyzing the deformations and the stresses of the hook bolt under the dynamic loading, caused by the train, is crucially important for the security of the train operation. In our study, by using the bending strains along the straight part of the hook bolt, we present a new method for estimating the axial force acting on the hook bolt when it is fastened. And performing both the deformation analysis based on the Castigliano's theorem and the 3D-FEM analysis, we clarify the stress distribution of the bolt. The experimental results are compared with the theoretical ones and the validity of the present approach are demonstrated.
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