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How does ideCAD design Four Bolts Unstiffened End Plate Connection according to AISC 358-16 & AISC 360-16?

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L_h = distance between plastic hinge locations, in. (mm)
L_st = length of stiffener, as shown in Figure 6.5, in. (mm)
M_pr = probable maximum moment at the plastic hinge, kip-in. (N-mm), given by Equation 2.4-1
S_h = distance from the face of the column to the plastic hinge, in. (mm)
V_gravity = 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)
V_{u= shear force at the end of the 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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BASICS

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Four bolt end-plate connections consist of welding the beam to an end plate and bolting the end plate to a column flange.

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Connection Design Parameters

Resistance factor for ductile limit state (Yielding Limit State):

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Resistance factor for Non-ductile

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limit state (Rupture Limit State): 

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• Plastic hinge length S_h is defined in the relevant application rules section for each joint type.

• Plastic hinge moment values:

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Distance from the face of the column to the plastic hinge, S_h, for four bolts unstiffened end plate connection, is the lesser of d/2 or 3b_bf

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The probable maximum moment at the plastic hinge is given below, according to AISC 358-16.

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The moment at the face of the column, M_f., is calculated according to AISC 358-16 Eq. 6.8-1 given below.

The V_u used in the

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dimensioning of the joint is determined according to the equation in the above image by summing the shear force determined based on

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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.

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