# Steel-Important-Notes.docx - Steel Important Notes e o=...

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Steel Important NotesShear CenterThe shear center is the location in a cross-section where notorsion occurs when flexural shear acts in planes passingthrough that location.Shear center also pertains to the centroid, center of gravity orcenter of mass in some cases like for an I-beam shaped and shaped sections where shear center coincides with the centroid.Steps in Solving Plastic Section Modulus (Zx)Z-
1. Solve for the area of the section, (A) [mm2
A2. Compute for the centroid or center of gravity, (yb) [mm]B
3. Find the moment of Inertia along x-axis, (Ix) [mm4
C4. Solve for Q and the shear flow (qb)
6. Locate Shear Center, (eo)
4I= Hdeo=HdV[mm]Plastic Analysis1.Steps in Solving Plastic Section Modulus (Zx)
A=12bdӯ=13dA=π r22ӯ=4r3πA=π r24ӯ=4r3πA=23bhӯ=25h=38bA=1n+1bhӯ=n+14n+2h=1n+2b2.Shape Factor (f)f=MpMy=ZxSxWhere:ZxPlastic Section ModulusSx– Elastic Section ModulusSx=McWhere: M – Moment of Inertiac – distance from Elastic Neutral Axis (N.A.) to the remotestelementShapesMoment of Inertiax=bh312x=bh336x=π r44P.N.C.
1. Apply the load to a simply-supported beam to know the overallheight of the moment diagram.2. Identify the points in the beam that will become plastic hinges.
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