Perforated channels and upright stiffeners were employed in the diagonal unbonded steel plate brace encased in reinforced concrete panel, referred to as panel buckling restrained brace (panel BRB), to improve the punching shear capacity of panel. Quasi-static tests were carried out to investigate effects of constructional details on the hysteretic behavior of panel BRBs. Punching shear design methods for the panels were examined based on test results. Tests reveal that the perforated channels can avoid the punching shear failure of panel and greatly decrease the punching shear cracks, as compared with the additional steel bars used around the brace. Besides, compared with flat stiffeners, the upright stiffeners used in a brace can decrease the width of gap between the panel and the brace near the tips of stiffeners and therefore decrease the punching shear forces applied to the panel by the ends of brace. Punching shear failure of panel or tension fracture of brace occurred at the end of tests. All specimens exhibited stable hysteretic behavior before the failure of panel BRBs occurred. The punching shear design methods for the panels were proposed based on the possible failure modes of panels.