What is Torsional Irregularity in a building?

Torsional irregularity in a building occurs when the center of mass of a building and the center of rigidity does not line up. This creates non-uniform ductility demands in the structure as well as a twist in a building.
Here is a short video on the same concepts. I hope you guys enjoy it.

[@waveisocean]

Your demonstration is so well explained! I appreciate that you also took the time to talk about typical solutions to this problem!
Fantastic work! I look forward to more videos!

[@biswabhanupuhan7036]

Thank you very much. We will never find this on youtube. Thanks for your blogs, videos, and your quora answers. Following from my undergrad.

[@kashifafridi651]

This video was legit on point. So informative and amazing analysis. Keep going sir!

[@StructuralMadness]

Thank you, Kashif!

[@KetanParmarReal]

Hi Jinal, I have read many of your Quora posts, they were always informative & helpful.
Came to know about this channel from your blog. This is amazing video to understand fundamentals of torsion irregularity & how to reduce it. After introduction of new codes in India, torsional irregularity issue has become prominent in analysis. In our 3-4 years of experience with different buildings we are in state of mind that removing torsional irregularity is more of a trial & error than applying logic in X & Y direction to bring the torsional mode to 3rd position. I will wait for your blog to clear the understanding then will ask some questions around it. Please blog more often.

[@aadityarajbhattarai46]

Excellent explanation. Thanks

[@civilengineering7329]

That was amazing !!!!!!!!!!!!!!

[@khaledaly7007]

great informative video for describing Torsional irregularity ....Thanks alot

[@raminmobini6176]

Perfect explaination. thank you

[@dhirenderbisht4956]

Nice explanation..
Keep it up

[@ing.estructural7737]

Great Insight. Greetings from México.

[@StructuralMadness]

Thank you Emmanuel!

[@doctormcgoveran2194]

one difficulty I see is the displacement and force relations. Like a spring. is it x pounds for inch of displacement? How closely will the pounds of force for inch of displacement match between the lighter space frame and the moment frame, and will this difference cause a failure?

[@ArunKumar-jf5wz]

Theoretically explained great stuff.please explain mathematically also , derive the equation and applied earthquake force value

[@romeoriguer8685]

Wow. The way you explain it makes the topic easy to understand. Thank you sir for making this video. It greatly helps me understand my report. Anyway, What do you called that magnetic model that you have ?

[@abrartamboli7033]

It was very nice information. Could you suggest books or articles to refer regarding this particular topic.

[@swapnil3310]

Thanls for this video

[@positivevibes4265]

Please post video on shear wall, how it will take forces in plane to it

[@swapnil3310]

Can you explain different approaches to seismic design please

[@asifoo7]

thanks

[@tushartipshetty1536]

Can someone share the blog link?

[@positivevibes4265]

What is the function of diaphragm in building??? Please explain with vidoe

[@mohammedlasmi649]

Thanks too much

[@rushabhsonaiya7601]

hey.
could you please answer this query of mine
.how do rcc slabs act in real life structures when lateral forces act on them. do they act as a rigid diapgragm or a semi rigid diaphragm.are they designed for any lateral forces acting on it?

[@JinalDoshi91]

Hello, the rigidity of the diaphragm should be based on the diaphragm deformation compared to the deformation of the lateral system. Rigid or semi rigid are analysis perspective. If the diaphragm is a long span diaphragm, then there will be additional diaphragm deformations which should be accounted for, and it's flexibility / rigidity can also impact the load distribution between multiple LFRS frames. In such scenarios assigning a rigid diaphragm for analysis wouldn't make sense. But if the diaphragm is relatively stiff and short span, then you can assume it to be rigid. Although it is not as simple as this to classify the diaphragm as rigid or semi rigid. It also depends on openings in diaphragm, layout of LFRS system, torsional irregularity, span to depth ratio of diaphragm and so on. ASCE 7 as well as NEHRP design provisions will give you a very good explanation on how to determine the rigidity of diaphragm for analysis purposes. And the diaphragms are and should always be designed for the lateral forces acting on them. That is the primary load path on how the forces get into and out of the LFRS system.

[@rushabhsonaiya7601]

thank you for your response sir.i look upto be like you😃

[@robertriquelmy7193]

Poor audio