Influence of bending angle of steel strand suspender on mechanical properties and fatigue life
In order to investigate the influence of different axial deflection angles on mechanical properties and fatigue life of arch bridge suspender,a study was conducted on the basic unit of the suspender,1860 grade ϕs 15.2 seven wire steel strand.The static load tensile test of steel strand at 6 deflection angles(0,3,6,9,12,15mrad)was carried out,and finite element simulation verification was carried out by using ANSYS Workbench.Subsequently,ANSYS Workbench and Ncode Design were used to jointly simulate the influence of different axial deflection angles on the fatigue life of steel strands.The results indicate that the failure of the steel strand occurs at the anchorage end,and its breaking force value decreases with the increase of the axial deflection angle,and the amplitude of the decrease also increases accordingly.When the axial deflection angle is 15mrad,the breaking force value decreases by about 12%;The fatigue life of steel strands decreases with increasing deflection angle,and the fatigue failure point mainly occurs at the outer wire anchorage end.When the deflection angle reaches 15mrad and the stress amplitudes are 250MPa and 300MPa respectively,the fatigue life of the steel strand decreases by more than 15%.
steel strandarch bridge suspenderaxial deflection anglemechanical propertyfatigue lifefinite element simulation
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