The　finite　element　analysis　for　a　one-story　pure　steel　frame,　a　one-story　frame　with　inclined　braces　and　a　30-story　structure　were　performed.　Results　show　that　the　stiffness　of　the　bolted　beam-column　joint　has　significant　effect　on　the　internal　force　of　component,　bearing　capacity　of　component,　lateral　displacement,　story　stiffness,　natural　vibration　characteristics,　component　damage　ratio,　ultimate　load　and　failure　mode　of　the　pure　frame.　The　joint　should　be　calculated　according　to　its　actual　stiffness.　But,　since　the　joint　stiffness　has　little　effect　on　the　mechanical　behavior　of　the　frame　with　inclined　braces,　the　joint　could　be　taken　as　rigid　connection.　The　effect　on　the　30-story　structure　is　related　to　the　ratio　of　the　number　of　bolted　beam-column　joint　without　brace　to　the　total　number　of　the　beam-column　joints.　When　the　ratio　is　less　than　4.2%　and　the　stiffness　of　beam-column　joint　reaches　3×104　kN·m/rad,　the　integral　structure　could　be　designed　assuming　that　the　bolted　beam-column　joints　are　rigid　and　the　results　do　not　need　to　be　modified.　When　the　above　requirements　could　not　be　met,　a　simplified　analysis　method　was　proposed.　The　beam-column　joint　could　be　simplified　as　rigid　connection　first.　Then　the　structural　displacement,　period,　bearing　capacity　of　component　was　simply　modified.　The　proposed　method　provides　the　references　for　the　design　of　this　kind　of　structure.　©　2016,　Science　Press.　All　right　reserved.