Gusset connections – Column-beam-brace
References
Ericksen, Jason, et. al HSS Design Manual, Volume 4:Truss & Bracing Connections. Glenview, IL: Steel Tube Institute, 2017.Details
From the reference:
Example 4-2.3. Slotted HSS Diagonal to Splice Plate connection example.
Given:
Welds: E70XX
Brace HSS 6X6X3_8
- Hbr = 6 in.
- Bbr = 6 in.
- Tbr = 0.349 in.
Splice plate: ts = 5/8 in.
Gusset plate: tgp = ¾ in.
Connection Forces: Brace axial force Pu_br = ± 75 kip (tension/compression)
This example will only include the design of the brace to gusset plate and tee connection. See Example 4-2.2 for the gusset plate to beam and gusset plate to column connections.
Refer to the figure in the reference for additional details.
Results
| Parameter | RAM Connection | Reference | Difference |
|---|---|---|---|
| Weld strength limit states – Weld Design Strength (Interface between Gusset – Top right brace – Directly bolted – Tab side –Weld capacity) - Vr (kips) | 133.64 | 133.6 | Difference due rounding. |
| HSS Brace limit states – Check HSS Brace wall to develop weld in shear yielding (Interface between Gusset – Top right brace – Directly bolted – HSS wall shear yielding) – Vr (kips) | 251.28 | 251 | Difference due rounding. |
| HSS Brace limit states – Check HSS Brace wall to develop weld in shear rupture (Interface between Gusset – Top right brace – Directly bolted – Brace – HSS wall shear rupture) – Vr (kips) | 233.69 | 233 | Difference due rounding. |
| HSS Brace limit states – Tensile yielding in HSS Brace (Interface between Gusset – Top right brace – Checks for gusset and brace –Brace – Yielding strength due to axial load) – Tr (kips) | 341.10 | 341 | Difference due rounding. |
| HSS Brace limit states – Tensile rupture in HSS Brace (Interface between Gusset – Top right brace – Checks for gusset and brace –Brace – Tensile rupture) – Tr (kips) | 202.54 | 206 | Difference due rounding. |
| Strength based on bolting to the splice plate – Bolt shear (Interface between Gusset – Top right brace – Tab side – Bolts shear) - Tr (kips) | 97.36 | 97.2 | Difference due rounding. |
| Strength based on bolting to the splice plate – Bolt bearing in splice plate (Interface between Gusset – Top right brace – Tab side – Bolt bearing under shear load) - Tr (kips) | 214.10 | 213 | Difference due rounding. |
| Tensile yielding of the splice and gusset plate (Interface between Gusset – Top right brace – Tab side – Tab tensile yielding) - Tr (kips) | 141.75 | 130 | Difference due to the length is not the Whitmore length as recommended on AISC. |
| Tensile rupture of the splice and gusset plate (Interface between Gusset – Top right brace – Tab side – Tab tensile rupture) - Tr (kips) | 135.94 | 121 | Difference due to the length is not the Whitmore length as recommended on AISC. |
| Block shear rupture of the gusset plate (Interface between Gusset – Top right brace – Tab side – Block shear on gusset) - Tr (kips) | 198.90 | 198 | Difference due rounding. |