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Conditions to meet
It must be capable of providing the relative storey drift angle of at least 0.02 radians for limited ductility level specified in Annex 9B, and at least 0.04 radians for high ductility level.
For rolling mill wide head sections, the limits detailed below should be followed.
Basics
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Lh = distance between plastic hinge locations, in. (mm)
Lst = length of stiffener, as shown in Figure 6.5, in. (mm)
Mpr = probable maximum moment at plastic hinge, kip-in. (N-mm), given by Equation 2.4-1
Sh = distance from face of column to plastic hinge, in. (mm)
= the lesser of d/2 or 3bbf for an unstiffened connection (4E)
= Lst + tp for a stiffened connection (4ES, 8ES)
Vgravity = beam shear force resulting from 1.2D + f1L + 0.2S (where f1 is a load factor determined by the applicable building code for live loads, but not less than 0.5), kips (N)
Vu= shear force at end of beam, kips (N)
bbf = width of beam flange, in. (mm)
d = depth of connecting beam, in. (mm)
tp = thickness of end-plate, in. (mm)
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Ductile failure limit state (Flow Yielding Limit State):
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Non-ductile failure limit state (
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Rupture Limit State):
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Plastic joint hinge length l Sh is defined in the relevant application rules section for each joint type.
Plastic joint hinge moment values:
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The V- end used in the dimensioning of the joint is determined according to the equation in the above image by summing the shear force determined on the basis of the yield state and the shear force calculated from the combination of 1.2G + 0.5Q + 0.2S on the plastic joint at the end of the beam .
The shear strength required for the shear zone is calculated by using the column shear force generated by the possible plastic moments of the beams connecting to the column.
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Application Limits
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