Blog

Using ASD, determine whether the following member satisfies the appropriate AISC interaction equation. Do not consider moment amplification. The loads are 50% dead and 50% live load. Bending is about the x-axis.Given:    W14x82, A992    Applied axial compression force = 220 kip    Applied constant bending moment = 180 ft-kip    L = 14 ft    pin-pin connected    laterally braced at ends    Kx = Ky = 1    Cb = 1

A W10x88 made of A572 Grade 42 steel is subjected to a maximum bending moment of 190 kip-ft about its x-axis. Determine the maximum magnitude of bending stress in the beam.

Mlt represents the maximum moment caused by sidesway.

If purlins are placed at the joints of a truss top chord, the top chord is considered a beam-column.

A W14x74 of A992 steel is to be investigated for use as a beam-column in an unbraced frame. The length is 14 feet. First-order analyses of the frame were performed for both the sway and nonsway cases. The factored loads and moments corresponding to one of the load combinations to be investigated are given for this member in the following table. The multiplier to account for P-δ effects was determined to be 1.06, and the multiplier to account for P-Δ effects was determined to be 1.25. Determine the required second-order axial strength, Pr, of the member.Type of analysisPu (kip)Mtop (kip-ft)Mbottom (kip-ft)Nonsway4454526Sway1004095 

A W14x82 of A992 steel is to be investigated for use as a beam-column in an unbraced frame. The length is 15 feet. First-order analyses of the frame were performed for both the sway and nonsway cases. The factored loads and moments corresponding to one of the load combinations to be investigated are given for this member in the following table. The multiplier to account for P-δ effects was determined to be 1.05, and the multiplier to account for P-Δ effects was determined to be 1.26. Determine the required second-order axial strength, Pr, of the member.Type of analysisPu (kip)Mtop (kip-ft)Mbottom (kip-ft)Nonsway4903532Sway1454095 

An unbraced beam-column within a rigid frame has an Euler buckling strength of 1,799 kips with a story shear of 4.43 kips. What is the drift index for the column?

Use the Steel Construction Manual to determine the plastic moment capacity, Mp, of a W18x106 beam made of A913 Grade 60 steel.

A W14x74 of A992 steel is to be investigated for use as a beam-column in an unbraced frame. The length is 14 feet. First-order analyses of the frame were performed for both the sway and nonsway cases. The factored loads and moments corresponding to one of the load combinations to be investigated are given for this member in the following table. The multiplier to account for P-δ effects was determined to be 1.14, and the multiplier to account for P-Δ effects was determined to be 1.25. Determine the required second-order axial strength, Pr, of the member.Type of analysisPu (kip)Mtop (kip-ft)Mbottom (kip-ft)Nonsway3905017Sway1454090 

Drift index is the ratio of the story drift to the story volume.