One portal built with column WF450x300, and beam WF300x200. Both profiles are made of BJ 37 (Fy=240MPa). Perpendicular to the plane of the drawn portal, each floor braced; so that the possible sway in perpendicular direction can be avoided. a. For the strong and weak axes, determine effective length of column BC, and EF b. If the DE column is bent, which type of buckling what is happening and where is it going? c. Determine the nominal strength of column DE WF450x300 WF300x200 A = 157.4 80.58 cm2 Ix = 56100 13300 cm ly = 8110 1900 cm rx 18.9 12.6 cm ry = cm = 7.18 4.77 Bf = 300 tf = 18 H H 400 tw = 11 200 14 300 9 mm mm mm mm F E 4 m B G GH GA G E - 1.0 20,0 100 E SOLO 100 50 40 3.0 20 100 2 50,0 - 30,0 - 00 - 6 m 500 - 100 SO 30 2.0 500 200 2010 --- - ID AV 5.0 - 4.0 + - 3.0 + + 4m 8 m -- 100 - SO 7,0 60 5.0 100 XO 7.0 I IA H H I I 1,0 + SO 10 20 1.0 +0,7 1.0 0.8 017 LO 0.5 04 013 0,7 0,0 - 0.5 - 0.4 0.3 --- + 3.0 30 2.0 - 2.0 + 1.5 -0.6 0.2 1.0 10 0,1 0.1 0 . 0 D Los (a) Sy prevent (Braced frame) ) 10 LO 0 (a) Sideway to prevented (Ubicace frame) One portal built with column WF450x300, and beam WF300x200. Both profiles are made of BJ 37 (Fy=240MPa). Perpendicular to the plane of the drawn portal, each floor braced; so that the possible sway in perpendicular direction can be avoided. a. For the strong and weak axes, determine effective length of column BC, and EF b. If the DE column is bent, which type of buckling what is happening and where is it going? c. Determine the nominal strength of column DE WF450x300 WF300x200 A = 157.4 80.58 cm2 Ix = 56100 13300 cm ly = 8110 1900 cm rx 18.9 12.6 cm ry = cm = 7.18 4.77 Bf = 300 tf = 18 H H 400 tw = 11 200 14 300 9 mm mm mm mm F E 4 m B G GH GA G E - 1.0 20,0 100 E SOLO 100 50 40 3.0 20 100 2 50,0 - 30,0 - 00 - 6 m 500 - 100 SO 30 2.0 500 200 2010 --- - ID AV 5.0 - 4.0 + - 3.0 + + 4m 8 m -- 100 - SO 7,0 60 5.0 100 XO 7.0 I IA H H I I 1,0 + SO 10 20 1.0 +0,7 1.0 0.8 017 LO 0.5 04 013 0,7 0,0 - 0.5 - 0.4 0.3 --- + 3.0 30 2.0 - 2.0 + 1.5 -0.6 0.2 1.0 10 0,1 0.1 0 . 0 D Los (a) Sy prevent (Braced frame) ) 10 LO 0 (a) Sideway to prevented (Ubicace frame)