Serviceability or ultimate limit state?

[SMiK21]

The design of an anchor bolt's length should be considered as serviceability or ultimate limit state?

I'm reviewing a project and the engineer who made it calculated it as serviceability, thus reducing the loads, but I think it shoud definitely be ultimate limit state.

I thank you in advance for your thoughts and comments on this.

 

[rowingengineer]

ultimate loads should be accounted for.



How could you do anything so vicious? It was easy my dear, don't forget I spent two years as a building contractor. - Priscilla Presley & Ricardo Montalban

 

[hokie66]

All limit states must be considered.

 

[ishvaaag]

The question will depend on the regulating code. Certainly anchors to concrete can as well be designed safely at service level, or ASD. However, this must not be thought as the anchor bolt being designed "for serviceability"; if following proper procedures, a design per ASD or limit states' procedure should give similar result.

Other requirements may require to check separately as well and even as some requirement of proper structural strength what happens at service level, such anchors in akin function to pretensioned bolts etc.

In whatever the case, the applicable code should be precise enough at least on what is required, and permissible or not.

 

[TXStructural]

In short, the anchorage should not fail before either 1) the connected components fail, OR 2) the design loads including load and resistance factors or safety factors are applied.

You might design an anchorage for service loads when deflection or deformation under service load are critical conditions (as with a moment connection between foundation and frame), but that would not be adequate for design of the strength of the connection.

 

[SMiK21]

OK, thank you all.