Etabs 2015 - Torsional Irregularity check with seismic loads

Etabs 2015 advanced tutorial deals with the torsional irregularity check with seismic loads in high rise building.This is one of the most essential checks to be considered in high rise building design.Following are discussed in the tutorial.
(1) Drift 1:44
(2) Story Drift 7:07
(3) Torsional Irregularity 10:47
The initial part oft the tutorial explains on how to find the maximum drift occuring to a building when it gets subjected to earthquake loads in both direction and the check to make sure that the drift is within limits.
The second part of the tutorial illustrates on how etabs software calculates the story drift of a building.
The final part deals with the torsional irregularity check and explains how to find the whether the building is safe from this horizontal irregularity from the drift values obtained.
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[@katigawankati9114]

I am a Filipino...Indian professors were very good at tutorial..... Thank You for sharing your Great Knowledge... God bless You.

[@mohammedabdulsami3774]

are*

[@prajwalaavarebeel1790]

This is the best video I have come across till now .Way to go . Such clear explanation and clarity!!

[@civilknowhowtutorials7100]

+Prajwala Avarebeel thank you

[@salihsidahmed3093]

Thanks a lot for all these useful information a bout irregularity .. I really appreciate this effort..

[@frozanbarakzai1136]

Thank you very much sir for such a big cooperation to humanity with your tutorials. Could you please upload more videos advanced topics. Thank you!

[@civilknowhowtutorials7100]

+Farzad Hakimi yeah...sure..:-)

[@shaikmasoodali9552]

please use pinned comment to share related study material and models for practicing. the story drift with respect the story above and below is called inter storey drift

[@sathyabalasundaram1801]

Thanks for sharing such a useful videos.Please share more tutorial for design of flat slab and shearwall in etabs.

[@zericohasugian8181]

thank you very much sir, you did a great job. You can give an explanation that is so easy to understand. once again, thank you very much sir...

[@dawidadem8658]

Thank you sir, I recognize a lot of things from your tutorial and it is best if yo consider building with shape irregular.

[@beardosrk8797]

can you please upload the modelling tutorial of this structure...

[@sivaramakrishnanalluri6445]

Sir please do videos on Staad pro also and Design of slab culvert, T-beam bridge design etc...

[@maspicard]

This is the best series structural analysis video, anyway can you share the tutorial how to design shear-wall with etabs ? thanks sir a lot.

[@civilknowhowtutorials7100]

+ardiakirana yeah sure :-)

[@engrshamsurrehman4599]

Civilknowhow Tutorials waiting of the shear wall design

[@obedtari8390]

Thank you very much sir. Keep teaching...very informative information

[@arjunraj7904]

very nice explanation and thank u sir for the video. i have a question. How to find the centre of rigidity of diaphragms assigned to floors when more than one diaphragms has been assigned?Do we have calculate it manually?

[@sasikumartherayil9620]

Great class. Great sound.perfect work .

[@adirajasimamora9720]

After we know there's a torsional irregularity, what is the next analysis we have to do? Thanks sir

[@AmanSharma-bp8gu]

thanks 4 such an awesome video, i want 2 ask that which code are u using in this video.

[@faizurrehman2523]

Very useful video. expect more video like this one.

[@ankitsoni3749]

how to check the base shear of building

[@sivaramakrishnanalluri6445]

Thank sir for providing such a wonderful videos. Please provide more videoes

[@alrazzakpress6180]

can u upload base shear and over turning moment video

[@alexsoto2572]

Thank you for the tutorial. I have a question, How could you find the drifts in the second case? The second case, the values drifts in R1 and R2 show more difference

[@sangama98]

stability checks should be done for dynamic earthquake right you are doing it for static

[@asadnaeem742]

Dear Civilknowhow, thank you for sharing detail etab video, can you please show how we can calculate the center of rigidity (center of stiffness) and Center of mass of 3d building. Do we need semi rigid diaphragm or rigid diaphragm? thanking in anticipation.

[@ajajay4011]

Awesome video..kindly upload the video for detailling

[@civilknowhowtutorials7100]

+aj ajay u meant reinforcement detailing or creating project reports??

[@ajajay4011]

yeah

[@civilknowhowtutorials7100]

+aj ajay I think that only possible in a licenced version...neways try this ...go to file,select create report...n from model explorer dialog box just check whether the detailing option is working or not...

[@civilknowhowtutorials7100]

+aj ajay Go to concrete frame design....n select the summary...u wil get all the moment and area details as shown in tutorial 4

[@subashpathak4638]

In static analysis, While defining load pattern for EQX ,if we choose design eccentricity along positive x direction and negative x direction....Is it required to mention the eccentricity like 5 percent anywhere like while defining mass source ..

[@engr.md.rafiqulislam4168]

Thank You very much. I have trying to learn some how it and now i am clear about it.

[@civilknowhowtutorials7100]

+Rafiqul Islam Glad to hear that...:-)

[@lifejourney7486]

Which code is used according to Is 1893:part I 2016 table 5 torsional irregularities check delta max >1.5delta min???

[@saurabhroy8606]

Sir thank you very very much...

[@pranitkhelurkar]

thanx...i have seen that many building are in odd shapes and they come under torsional irregularities in mode 1 and. mode2 ...mode1 sometime easy to remove but not mode2...any solution how to remove torsion in both modes

[@smushamsi]

don't we have to multiply the elastic drifts of 177mm with 0.7R to get inelastic drift for comparison with H/250 limit????

[@mahanteshkamatagi8599]

How to calculate torsional irregularity as per revised code IS 1893 2016 and how to read modal mass participation ratio table

[@muhammadfurqani9498]

thank you very much sir, its very helpful

[@devishree8122]

is there any vedio that, how eccentric varries by varring mass?

[@rashmi.b.rsetty7472]

thanks alott for sharing this vedios... all this time i was searching,, now i got it.. can i get vedios of pushover analysis of steel structures?

[@civilknowhowtutorials7100]

+Rashmi.B.R Setty will upload one..:-)

[@alikarout4700]

Hello, thank you for sharing this tutorials they are very useful. I have a question , why etabs give a higher story drift on top of roof, in case when I have reduce his area ?

[@civilknowhowtutorials7100]

+Ali Karout building is just like column with a free end...so the displacement will b high at free end

[@afzalandthedreams]

@@civilknowhowtutorials7100I have 2 doubts a) Is the drift limitation H/250 according to Indian code provision or other? b)Dmax/Daverage limitation is frm which code? Thanx

[@sheva7684]

Please awnser my folowing question.. is the first floors make the building none symitric so that in case of drift in direction of Xaxis there is a displacement in direction of Y also and vice versa .. or what makes a displacement in other axis??!!

[@arundathikalikar]

Thank you so much sir I have got clear idea now thank you once again

[@nagakishore7703]

How to decide column orientation pls make vedio sir and if there is prbm in center of gravity and center of rigidity what to do in etabs

[@saadfawad1699]

Can we also do for short stories building..h/250 ..??

[@backtomovie5382]

How do I obtain diaphragm chords and collectors forces within a floor and apply force in Etabs? Can you send me the steps?

[@sairammudumba2164]

What is the solution for this irregularity

[@EngineerObed]

I subscribe sir you serve a 1M+ Subs boss!!!!!!!!!!!!!!!!

[@farhatarranum8496]

IS THERE ANY VIDOES ON SHEAR WALL OR PIER DESIGN

[@leonardusivan9754]

Can you please give me the link to download this building structure's design in etabs format?

[@oscareulatic2964]

Hi sir, Do we need to define Floor diaphragms in order to check the drift and center of rigidity of the building?

[@sangama98]

yes rigid diaphragm you need to assign to check CS and CM

[@abhishekshelke4564]

What changes are to be made when structure comes under torsional irregularity? what is remedy for that/possible ways to solve torsional irregularity?

[@rda2743]

abhi shelke increase the size of your column or provide shear wall until your drift max is less than 1.2 or code provision..

[@yogeshbang]

While assigning columns, u had assigned all at its CG ..! Actually it's not like that na..if columns will be flushed at any of face then it shall not be at CG location, while assigning..as it will give different results in modal mass participation..due to change in CG & CR. I guess shall be location with offset command. Pls comment

[@simarpreetsaluja8320]

how to check torsion irregularity in staad pro?

[@engr.md.rafiqulislam4168]

Plez upload a time history analysis with details and best way how to perform it.

[@civilknowhowtutorials7100]

+Rafiqul Islam yes...I will upload it soon..

[@nasratullahamarkhail3217]

Sir, If we want to consider accidental torsion which is calculated according to FEMA provisions. Is it automatically applied in ETABS by considering the 5% eccentricity while defining the seismic load pattern or do we have to calculate it manually and applied it to each floor of the model as moment?

[@saurabhtariyal7742]

u have to define it in the load pattern as eccentricity=0.05

[@cristhianvivancomendoza7344]

When you assign excentricity .. you assign in load pattern or in mass source ??

[@sangama98]

you need to assign eccentricity in load case

[@HS-dq4uo]

thanks a lot but I want to know how to solve the problem of torsion irregularity if its exceed than ( 1.2 ) what we should to after that thanks

[@civilknowhowtutorials7100]

+Haithm Sobhy increase the column stiffness

[@dhanashreejare3247]

SIR, PLG GIVE SOLUTION. GIRDER SUPPORTING FLOATING COLUMN FAILING IN TORSION.

[@syedshehzadali5940]

many many thanks sir

[@praznkarmacharya6027]

can you provide the quarter circular stairs please sir?i have been trying to design such kinds of stairs but couldnt make it but couldnt make it.

[@civilknowhowtutorials7100]

+Prazn Karmacharya yup...wil try to upload one

[@shaikhismail9098]

how to check shear lag effect of tall buildings????

[@deresebirbirsa9321]

thank you so much

[@marcelo6838]

How can I do when I have an irregular plan structure?

[@civilknowhowtutorials7100]

+Marcelo Uvidia consider the top and middle story drift

[@praznkarmacharya6027]

thankyou so much sir

[@israrahmad3200]

sir, can i have the model file you are using here

[@sugavanan4]

how to find the centre of mass and rigidity

[@abinashmandal6202]

step 1: make sure while analyzing, "calculate center of rigidity " option is checked step 2: after analysis, go to display>show tables>analysis>structure results>center of mass and rigidity and then click ok.

[@mohdmalik5039]

thanks mate

[@ahmeddahir6854]

THANKS HELPFUL TTT

[@vaseeminamdar6616]

VERY HELPFUL N EASY TO UNDERSTAND TUTORIAL ENG.,, CUM WITH MUCH MORE SPECIALLY RELATED TO DYNAMIC ANALYSIS IT WUD BE BETTER IF IT S AS PER ACI ,,,,,, THANKS FR TIS VIDEO

[@civilideas1925]

👍🏻

[@afzalandthedreams]

Dear Sir, please could you send me the abive ETABS model case1&2 to my mail

[@michaelayenew5943]

how to get cracked etabs2015 with direct link

[@civilknowhowtutorials7100]

+michael ayenew Haven't found a link lyk that yet.....

[@prawingajbhiye8816]

Thank you sir

[@ankitbahukhandi1550]

How to control mass participation ?????