8/18/2019 Ahu Sb2 Best

1/2

Designer :Project Name :

Best & effective Solution of Structural Technology. BeST Ver 2.6

BeST MEMBER :Date : Page :

http://www.BestUser.com

AHU-SB2

Ｋｗａｉ Ｖｉｉ Ｃｅｅ  ７５

175

        2        5        0

        1        1

7

x

y

  Unit : cm

As  = 54.46

Ix  = 6193 Iy  = 983

Zx  = 551 Zy  = 171

J = 18 Cw  = 140311

Design Conditions

Design Code : AISC-2005(LRFD)Section Size : bㅐ-250x175x7x11

Steel Material Fy = 345 N/mm2 (A992)

Unbraced Lengths Lx = 2.95, Ly = 2.95 m

  Lb = 2.95 m

EffectiveLengthFact. Kx = 1.00, Ky = 1.00

Modification Factor Cb = 1.00

 Design Force and Moment

 Pu  = 0.0 kN

 Mux  = 14.6, Muy  = 0.0 kN·m

 Vux  = 0.0, Vuy  = 1.2 kN

Check Thickness Ratios for Flexure

Check Flange  -. λp  = 0.38 E/Fy   = 9.15

  -. λr  = 0.95 kcE/FL   = 22.90

  -. bf/2tf = 7.95 < λp  ---> Compact Section

Check Web  -. λp  = 3.76 E/Fy   = 90.56

  -. λr  = 5.70 E/Fy   = 137.29

  -. h/tw  = 32.57 < λp  ---> Compact Section

Check Flexural Strength about Major Axis

Compute Yielding Strength  -. Mp  = Fy*Zx = 189.97 kN·m

Compute Lateral-Torsional Buckling  -. Lp  = 1.76ry E/Fy   = 1.80 m

  -. Lr  = 1.95rts  E0.7Fy

 JcSxho

... = 5.59 m

  -. Mn,LTB  = Cb[Mp-(Mp-0.7FySx)(Lb-LpLr-Lp )]  = 168.59 kN·m

Compute Flexural Strength about Major Axis

  -. Mnx  = Min[Mp, Mn,LTB] = 168.59 kN·m  -. ΦMnx  = Φ*Mnx  = 151.73 kN·m

Check Interaction of Combined Strength

  -. Pu/ΦPn  < 0.20

  -. Ratio =Pu

2ΦPn+[

 MuxΦMnx

+ MuyΦMny ]  = 0.096 < 1.000 ---> O.K.

Check Shear Strength

Check Shear Strength in Local-y Direction  -. λr  = 1.10* kvE/Fy   = 59.24

  -. h/t = 32.57 < λr

  -. Cv  = 1.00

-. Vn  = 0.6*Fy*Aw*Cv  = 361.98 kN

  -. ΦVny  = Φ*Vn  = 325.78 kN

8/18/2019 Ahu Sb2 Best

2/2

Designer :Project Name :

Best & effective Solution of Structural Technology. BeST Ver 2.6

BeST MEMBER :Date : Page :

http://www.BestUser.com

AHU-SB2

Ｋｗａｉ Ｖｉｉ Ｃｅｅ  ７５

  -. Vuy/ΦVny  = 0.004 < 1.000 ---> O.K.