1. Select an ASTM A50 steel (F, = 345 MPa) W shape column that supports beam framing into it as shown. Sidesway is prevented by bracing system. K = 1, the column is pin connection at the top and bottom. POL= 100 KN PL = 200 KN PO 100 kN Pu 200 kN MDL 50 kNm ML = 75 kNm MOL-30 kNm Mu 50 kNm

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Chapter5: Beams
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1. Select an ASTM A50 steel (F, = 345 MPa) W shape column that supports beam framing into it as shown. Sidesway is
prevented by bracing system. K = 1, the column is pin connection at the top and bottom.
4.5 m
MDL = 24 kNm
MLL = 70 kNm
PDL= 300 KN
PLL. 900 KN
Gravity Loads
PDL 100 KN
PLL 200 KN
2. Select an ASTM A50 steel (F, = 345 MPa) W shape column, 4.5 m long, is to be design for use as a column in an braced frame
(sidesway is prevented). The axial load and end moments obtained from a first-order analysis of the gravity loads (dead load
and live load) are shown in Figure A. The frame is symmetrical, and the gravity loads are symmetrically placed. Figure B shows
the wind load moments obtained from a first-order analysis. Both analyses were performed with reduced stiffnesses of all
members. All bending moments are about the strong axis. If the moment amplification method is used, then we can consider
this to be the direct analysis method, and the effective length factor Kx can be taken as 1.0. Use Ky = 1.0. use 0.8 for reduced
stiffness (Pe1 =)
MDL = 20 kNm
M₁L 60 kNm
5 m
PDL 100 KN
PLL 200 KN
MDL 50 kNm
Mu. = 75 kNm
MDL 30 kNm
MLL = 50 kNm
4.5 m
M = 175 kNm
PDL= 100 kN
PL = 200 KN
P = 250 kN
Wind Loads
M = 175 kNm
Transcribed Image Text:1. Select an ASTM A50 steel (F, = 345 MPa) W shape column that supports beam framing into it as shown. Sidesway is prevented by bracing system. K = 1, the column is pin connection at the top and bottom. 4.5 m MDL = 24 kNm MLL = 70 kNm PDL= 300 KN PLL. 900 KN Gravity Loads PDL 100 KN PLL 200 KN 2. Select an ASTM A50 steel (F, = 345 MPa) W shape column, 4.5 m long, is to be design for use as a column in an braced frame (sidesway is prevented). The axial load and end moments obtained from a first-order analysis of the gravity loads (dead load and live load) are shown in Figure A. The frame is symmetrical, and the gravity loads are symmetrically placed. Figure B shows the wind load moments obtained from a first-order analysis. Both analyses were performed with reduced stiffnesses of all members. All bending moments are about the strong axis. If the moment amplification method is used, then we can consider this to be the direct analysis method, and the effective length factor Kx can be taken as 1.0. Use Ky = 1.0. use 0.8 for reduced stiffness (Pe1 =) MDL = 20 kNm M₁L 60 kNm 5 m PDL 100 KN PLL 200 KN MDL 50 kNm Mu. = 75 kNm MDL 30 kNm MLL = 50 kNm 4.5 m M = 175 kNm PDL= 100 kN PL = 200 KN P = 250 kN Wind Loads M = 175 kNm
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