In　order　to　solve　the　problem　that　the　ductility　capacity　of　structures　cannot　be　fully　reflected　by　using　a　single　structural　response　modification　factor　proposed　in　Chinese　seismic　design　codes　for　design　of　buildings　with　different　materials,　values　of　the　“capacity”　of　structural　response　modification　factors　and　their　variation　rules　are　analyzed.　17　RC　frame　buildings　with　different　fortification　intensities(VI,　VII,　VIII)and　storeys　are　designed　according　to　the　current　code　GB50011-2010.　The　OpenSees　FE　models　of　these　buildings　are　verified　by　structure　quasi-static　test　data.　For　these　17　RC　frames,　structural　seismic　responses　are　analyzed　by　nonlinear　static　procedures(NSP).　Results　show　that　for　VI,　VII,　VIII　RC　frames　designed　by　GB50011-2010,　the　minimum　values　of　“capacity”　of　structural　response　modification　factors　are　15,　10　and　5　respectively.　The　minimum　value　is　more　conservative　than　that　in　UBC　Formulas.　Conclusion　is　that　using　the　values　of　“capacity”　of　structural　response　modification　factors,　structural　ultimate　strengths　and　inelastic　deformations　in　critical　collapsed　state　can　be　estimated　©,　2015,　The　Editorial　Department　of　Journal　of　SJZU.　All　right　reserved.