I have a base plate with set of anchors on either sides of the expansion joint. I have modelled the expansion joint as a discontinuous edge. However, I get a high utilization on the concrete edge breakout under Shear force, since the Profis software consider the row of anchors adjacent to the joint for checking the breakout resistance. My understanding is that the breakout resistance will be higher if I can consider the concrete slab on the other side of the expansion joint, instead of considering a discontinuous edge as shown in the model. Is there a way to model a joint in the concrete or perform a calculation in the Profis software to consider the effect of concrete on both sides of the joint.
Hi Subhra,
Thanks for contacting Hilti.
If I could understand your question correctly, the baseplate would have anchors on both sides of the concrete joint. Although, Profis Engineering doesn't allow you to include a joint in the base material, we can suggest a few tips that might be helpful:
- Start by modeling the baseplate in a continuous concrete base with all anchors on both sides of the joint. This will allow you to get the anchor loads acting in each fixing point. Once this is done, the load per fixing information can be found on the right side of your screen, under "anchor loads".
- Once you save this design, you can duplicate it and remove all anchors on the right side of the baseplate (or other side of the joint), keeping only the side with the profile.
- Next you can include the concrete edge where the joint would be.
- You'll have to change the loads applying in the baseplate in a way that the load per anchor will be similar to the load per anchor in step 1 above. That way, you're not applying entire load acting in the baseplate in only 16 anchors instead of the 24 anchors.
In summary, the only way to consider a joint in your design is to apply an edge in Profis. It's important to note that a concrete joint will impact in the amount of concrete that is engaged by the anchor, therefore impacting in the concrete cone and concrete breakout failure modes.
I hope the above is helpful, but please reach to our technical support team if you need further clarifications and project related support >> here.
Kind regards,
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