Partially Reinforced Beam 3

[waldo459]

Can anyone explain to me how a allowable shear and moment diagram will look like for a steel beam that is partially reinforced with a C on top? The Lb is the length of the beam, the beam in reinforced in the middle third. Will the moment capacity of the unreinforced section be based on the entire length of the beam? Would the reinforced section moment capacity be based on the length of the reinforced section?

 

[kslee1000]

What type of loads this beam carries?

 

[miecz]

I don't think so. I'm assuming the full beam length is 30 feet. For the reinforced section, wouldn't that give the same capacity as a beam that is reinforced the full length?

 

[WillisV]

I would recommend the paper "lateral torsional buckling of stepped beams" by Park and Stallings. They did a bunch of FE analysis and proposed some simple design equations for this condition.

ASCE Journal of Structural Engineering, V139 Issue 11 pp1457-1465 published in Nov. 2003

 

[frv]

Star for that one!

 

[miecz]

Thanks again, WillisV.