Gusset connections – Column-beam-brace
References
Packer, Jeffery A., Donald Sherman, and Maura Lecce. Design Guide 24: Hollow Structural Section Connections. Chicago, IL: American Institute of Steel Construction, 2010. pp 65-72.
Details
From the reference:
Example 5.2. Slotted Round HSS/Gusset Connection
Determine the available tensile strength for the HSS in the connection illustrated in Figure 5-10. The slot in the HSS for the gusset plate is concentric and is 1/16 in. wider than the plate thickness to allow the clearance. Laboratory tests on such statically loaded connections (Martinez-Saucedo and Packer, 2006) have shown that the end of the slot in the HSS need not be machined or drilled to a smooth radius. The four bolts are 7/8 in. diameter ASTM A325-N in standard holes.
From AISC Manual Tables 2-3 and 2-4, the material properties are as follows:
HSS 6.000X0.250
ASTM A500 Grade B
- Fy = 42 ksi.
- Fu = 58 ksi.
Plates
ASTM A36
- Fy = 36 ksi.
- Fu = 58 ksi.
From AISC Manual Table 1-13, the HSS geometric properties area as follows:
HSS 6.000X0.250
- A = 4.22 in2.
- D = 6.00 in.
- t = 0.233 in.
The gusset plate geometric properties are as follows:
Gusset plate
W = 7.00 in.
Tp = 0.375 in.
Refer to the figure in the reference for additional details.
Results
| Parameter | RAM Connection | Reference | Difference |
|---|---|---|---|
| HSS tensile yielding (Interface between Gusset – Top right brace – Checks for gusset and brace – Tension yielding) - Vr (kips) | 159.52 | 159 | Difference due rounding. |
| Gusset plate tensile yielding (Interface between Gusset – Top right brace – Bolted side – Tab tensile yielding) – Vr (kips) | 82.01 | 85.2 | Difference due rounding. |
| Gusset plate tensile rupture (Interface between Gusset – Top right brace – Bolted side – Tab tensile rupture) – Vr (kips) | 77.48 | 81.8 | Difference due rounding. |