Maximum displacement acceptable for a high-rise building in Karamba

Replies to This Discussion

Permalink Reply by Romain Mesnil on April 24, 2015 at 6:31am

Hi Aryan,

I would say a first rough estimate would be to take a reasonable value between H/300 and H/500 (for a static load), so around 30cm deflection.

That being said, there are many criteria on displacement for high rise building depending on what you consider. In high rise buildings, dynamic loads like wind are usually governing the design, especially if you consider comfort. In this case, a more appropriate design criterion would be a "maximal acceleration". I don't have the figures in mind, but I think that we perceive vibrations at 2 milli-g.

You can also check the inter-storey drift, which should not exceed h/100, where h is the inter-storey height.

Best,

Romain

Permalink Reply by Aryan Shahabian on April 24, 2015 at 9:03am

Hi Romain,

Thanks for your reply. How can I measure inter-storey drift using Karamba? Is there any specific component for checking that?

Permalink Reply by Romain Mesnil on April 27, 2015 at 6:41am

Hi Aryan,

I don't think that Karamba does this automatically, you need to do a little post-treatment here. You'll have to retrieve nodes belonging to each floor and compute their relative displacement (compute the difference and compare with the inter-storey height). If you have vertical elements on the facade, this task should be quite easy (just take the end nodes of these elements).

Permalink Reply by Aryan Shahabian on April 27, 2015 at 10:45am

Many thanks Romain! That's a good trick.