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Figure 1 - Bending (=tp*Fv,Ed) in the anchors due to the oversized holes in the plate
In BIM Designer Steel Connection 2019, 4 conditions need to be fulfilled in order to have bending in the anchors:
Note: Currently, BIM Designer Steel Connection 2019 verifies the bending in the anchors only when tension force is applied (N>0) and shear force is defined (V≠0). In the next version of BIM Designer Steel Connection, this verification will be performed even if there is no axial force defined or if the compression force has a low value |N|*0.3<|V|.
3. Design Assumptions dialog, select the "Bending from eccentricity in anchors" option
Figure 2 – Design Assumptions icon
Figure 3 – Option Bending from eccentricity in anchors
4. Define oversized holes: add at least 2 mm to the tolerance of the normal hole in the Holes tab from the Anchors dialog
Figure 4 – Anchors icon
Figure 5 – Declaring oversized holes
A supplementary tension force is developed (Ft,Ed,eq, based on the recommendations detailed in the CNC2M "Recommandations pour le dimensionnement des assemblages selon la NF EN 1993-1-8" - April 2015) and has the following formula:
Figure 6 – Supplementary tension force Ft,Ed,q
The resistance of the anchor will then be checked as follows:
Figure 7 – Verification formulas with this supplementary force
For more details, please check the chapter ‘’Anchor bolt tension verification’’ from the joint report.
When shim plates are enabled: the value "tp" must include the shim plates thickness.
Note that the verification of the bending in anchors is not conditioned by the levelling plate.
