Connection Wednesdays - Moment connection with haunches
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2026-03-18T10:00:00.0000000Z(en votre temps local, format 24 heures)
Date de webinaire:
Rejoignez le webinaire pour savoir plus de
- How to model a haunch
- The influence of the haunch on the Connection model
- How to correctly load the model using FEA results
- How to ensure the moment resistance and stability
Lecteurs
IDEA StatiCa
IDEA StatiCa
Haunched connections increase rotational stiffness and moment capacity by enlarging the lever arm and changing the internal force path at the joint. Their performance depends strongly on the haunch shape, flange stiffness, and overall detailing. In IDEA StatiCa, you can model and check virtually any haunch geometry without simplifying the shape, so both typical and non-standard configurations can be verified based on their real behavior.
We will look at how to model haunched connections efficiently. In some cases, the full length of the haunch should be included to capture force transfer and stability effects properly. In other situations, modeling only a representative segment is sufficient and more practical. Understanding when a simplified model is appropriate and what the limits are helps achieve more accurate results.
Local buckling and rotational stiffness
Beyond resistance, the stability of the haunch must be verified. The compressed part of the haunch can be sensitive to local buckling of the web or flange that may govern the design. In IDEA StatiCa, these effects can be assessed directly, including buckling checks, so the connection is verified not only for strength but also for stability under the applied loading.
For moment frames, it is essential to verify that the connection provides sufficient rotational stiffness to meet the assumptions of the global analysis model. The stiffness of a haunched joint depends on the beam, column, haunch geometry, and detailing. In IDEA StatiCa, the rotational stiffness can be evaluated directly, allowing engineers to confirm joint classification and ensure compatibility with the structural analysis assumptions.
Want to see more webinars on steel?
Learn more about the design of steel connections and structural members with IDEA StatiCa:
- Connection Wednesdays – From Grouping to Delivery: Simplifying Steel Connection Design
- Connection Design: Steel structure with composite deck
- Connection Wednesdays – The Twist
- Connection Wednesdays – is Excel still more effective?
Register for free and join the live webinar on Wednesday, March 18, 2026, at 11:00 CET (UTC+1).