Abstract
This study presents a numerical modelling and prediction of cyclic response of all-steel buckling-restrained braces (BRBs) under different loading histories using a finite element software ABAQUS. The numerical models are validated by comparing the predicted hysteretic response, core fracture, energy dissipation and displacement ductility with the results of a past experimental study. Later, the validated numerical model is used in a parametric study to investigate the influence of coefficient of friction and clearance between the steel core and restrainers, the length of yielding core segment and the position of stoppers on core segments on the cyclic response of steel BRBs. The coefficient of friction is varied in the range of 0–0.5, whereas the gap value is varied in the range of 0–5 mm. The main parameters studied are the hysteretic response, axial resistance, instance of core fracture and energy dissipation response. Based on the analysis results, the optimum values of friction coefficient, gap, length of yielding core and stopper orientation have been recommended for steel BRBs.
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