From the perspective of seismic design, optimum design is suggested according to the parametric analysis results. Particularly, medium level of volumetric ratio about 1.59% of embedded truss web brace is most efficient in ensuring satisfactory energy dissipation capacity and ductility as compared with the other two parameters. In order to avoid the adverse effect on ductility behavior, the axial load ratio should be limited to the medium level, about 0.13 for the nominal value or about 0.30 for the design value.