How does ideCAD design Welded Web (WUF-W) Moment Connections according to AISC 360-16 & AISC 358-16?
Design limit states of welded web connections are calculated automatically according to AISC 360-16 and AISC 358-16.
Symbols
Ag: Gross area
An: Net cross-section area
Ae: Effective net cross-sectional area
Avg: Gross area under shear stress
Anv: Net area under shear stress
Ant: Net area under tensile stress
Aw: Cross-section web area
bbf = width of beam flange, in. (mm)
bp = width of end-plate, in. (mm)
d = depth of connecting beam, in. (mm)
g = horizontal distance between bolts, in. (mm)
dh: Bolt hole diameter
Fy: Structural steel characteristic yield strength
Fu: Structural steel characteristic tensile strength
nsp: Number of slip planes
K: Effective length factor
L: Connector distance
tbf = thickness of beam flange, in. (mm)
tp = thickness of end-plate, in. (mm)
w = Size of weld leg, in. (mm)
Rn: Characteristic strength
Rnwl: Total nominal strength of longitudinally loaded fillet welds
Rnwt: Total nominal strength of transversely loaded fillet welds,
Connection Geometry
GEOMETRY CHECKS
Weld Access Hole Length
The maximum weld access hole length is checked per AISC 360-16.
L ≥ max( 1.5tw, 38 mm ) | AISC 360-16 J1.7 |
|
L | 50 mm | √ |
tw | 9 mm | √ |
Weld Access Hole Height
The maximum weld access hole height is checked per AISC 360-16.
H ≥ max( tw, 19 mm ) , H≤50mm | AISC 360-16 J1.6 |
|
H | 30 mm | √ |
tw | 9 mm | √ |
Shear Plate to Column Flange Weld Size
The minimum size of fillet welds is checked according to AISC 360-16 Table J2.4
w≥ wmin |
|
|
|
w | 12.73 mm |
| √ |
wmin | 5 mm | AISC 360-16 Table J2.4 | √ |
Shear Plate to Beam Web Weld Size
The minimum size of fillet welds is checked according to AISC 360-16 Table J2.4
w≥ wmin |
|
|
|
w | 8.487 mm |
| √ |
wmin | 5 mm | AISC 360-16 Table J2.4 | √ |
Continuity Plate to Column Flange Weld Size
The minimum size of fillet welds is checked according to AISC 360-16 Table J2.4
w≥ wmin |
|
|
|
w | 11.315 mm |
| √ |
wmin | 6 mm | AISC 360-16 Table J2.4 | √ |
Continuity Plate - Column Body Welding Thickness
The minimum size of fillet welds is checked according to AISC 360-16 Table J2.4
w≥ wmin |
|
|
|
w | 11.315 mm |
| √ |
wmin | 6 mm | AISC 360-16 Table J2.4 | √ |
PREQUALIFICATION LIMITS
Beam span / Beam cross-section height | 9144 mm /450 mm=20.32 | ≥9.0 |
Beam cross-section | 450 mm | ≤ 920 |
Beam head thickness, tbf | 15 mm | ≤25 |
Column cross-section height | 650 mm | ≤ 920 mm |
Flange plate weld | CJP | CJP |
tp | 10 mm | ≥9 mm |
a | 10 mm | 6≤a≤12 |
d | 50 mm | ≥50 mm |
Shear plate beam web weld size | 6 mm | =6 mm |
Flange plate weld | CJP | CJP |
STRENGTH CHECKS
Beam Shear Yield
The nominal and design yield strength of the web plate is checked according to AISC 360-16
Ag |  |
|
Fy | 275 N/mm2 |
|
Rn |  | AISC 360-16 J4-3 |
ΦRn |  |
|
Required | Available | Ratio | Control |
|---|---|---|---|
265.569 kN | 534.6 kN | 0.497 | √ |
Shear Plate to Column Flange Weld Strength
The nominal and design weld strength for the shear plate to column weld is checked according to AISC 360-16
Fe | 490000 kN/m2 | AISC 360-16 J2-3 |
w | 12.73 mm |
|
l | 380 mm |
|
Rreq |  |
|
hp | 380 mm |
|
tp | 10 mm |
|
Ry | 1.30 |
|
Fyp | 275 N/mm2 |
|
Rn |  |
|
ΦRn |  |
|
Required | Available | Ratio | Control |
|---|---|---|---|
815.1 kN | 904.94 kN | 0.901 | √ |
Column Panel Zone Shear
The welded web connection's panel zone shear limit state is checked according to AISC 360-16.
Pr | 429.124 kN | AISC 360-16 J10-9 |
Py |  |
|
F y | 275000 kN/m2 |
|
A g | 28634.759 mm2 |
|
dc | 650 mm |
|
tw | 16 mm |
|
Rn |  |
|
ΦRn |  |
|
Required | Available | Ratio | Control |
|---|---|---|---|
1497.795 kN | 1716 kN | 0.873 | √ |
Panel Zone Thickness
The required panel zone thickness for welded web connection is checked according to AISC 358-16.
tmin ≥u / 180 |  |
tmin = tw | 16 mm |
tw | 16 mm |
u | 2016 mm |
Required | Available | Ratio | Control |
|---|---|---|---|
11.2 mm | 16 mm | 0.700 | √ |