CSI ETABS - 10 - Torsion Irregularity check | Part 1

In this lecture, Torsion Irregularity Check as per ASCE Part 1, example 1, is discussed.
1- Torsion Irregularity check excel sheet/spreadsheet
Download: civilmdc.com/2...
2- ASCE 7-16 Minimum Design Loads and Associated Criteria for Buildings and Other Structures
Download: civilmdc.com/2...
EXPLANATION:
a) Torsional Irregularity: Torsional irregularity is defined to exist where the maximum story drift, computed including accidental torsion with Ax =1.0, at one end of the structure transverse to an axis is more than 1.2 times the average of the story drifts at the two ends of the structure. Torsional irregularity requirements in the reference sections apply only to structures in which the diaphragms are rigid or semi-rigid.
b) Extreme Torsional Irregularity: Extreme torsional irregularity is defined to exist where the maximum story drift, computed including accidental torsion with Ax =1.0, at one end of the structure transverse to an axis is more than 1.4 times the average of the story drifts at the two ends of the structure. Extreme torsional irregularity requirements in the reference sections apply only to structures in which the diaphragms are rigid or semirigid.
To compute Torsional Irregularity and Extreme Torsional Irregularity, as specified in ASCE 7-16 Table 12.3-1, item 1a and 1b must be performed and shown in this video.
Structures assigned to Seismic Design Category C, D, E, or F,
where Type 1a or 1b torsional irregularity exists as defined in
Table 12.3-1 shall have the effects accounted for by multiplying
M at each level by a torsional amplification factor (Ax)
The torsional amplification factor (Ax) shall not be less than 1 and
is not required to exceed 3.0. The more severe loading for each
element shall be considered for design.
As per ASCE 7 - 16 Code
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[@civilmdc]

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[@AHMADSHAHEEN-t7u]

When I click on the link for the download process, I do not find the Excel file. Please update the links

[@zakirhossian979]

Great Teaching method. Love from Bangladesh

[@civilmdc]

Thanks 👍

[@tajsay]

Thank you so muc Hussain.A brief and well-explained tutorial

[@Dr_Mike_US]

Hey Bro! You've done a fantastic job. You've uploaded great stuff related to Etabs. Pls, arrange Etabs Playlist...Thanks...We wanna watch them in order.

[@civilmdc]

Thanks.... i have arranged the playlist videos.... almost 90%, rest will also updated soon,..... By the way, thanks for your appreciative feedback.

[@BashirAhmed-jo4zq]

Learning alot from yuor videos Thanks Buddy

[@patekhurint1191]

Trima kasih banyak.. Tuhan memberkati mu

[@yzn121]

I think if you use Dynamic analysis (by defining response spectrum) you don't have to make any irregularity checks.

[@civilmdc]

It is necessary, these are structural irregularities. Dear bro, when i will upload the part II, You will get the more idea about irregularity checks........ For Example, if the structure has torsional irregularity, how to tackle...

[@yzn121]

@@civilmdc if there tortional irregularity you have to change the geometry and arrangement of shear walls to decrease eccentricity between center of mass and canter of rigidity but if this solution is defecult due to architectural issues .... we have to make Dynamic analysis

[@civilmdc]

@@yzn121 yes I agree... We have to apply dynamic analysis... 1st option... Change the structural arrangement.... 2nd option to counter the torsional Irregularity... If exist.... Apply the torsional amplification factor.... (how to apply... I will discuss in detail in part 2 of this video).... even while applying dynamic analysis.

[@yzn121]

@@civilmdc this is right to increase base shear obtained from Dynamic analysis to equivalent static load analysis value ... I'm waitnig for the next upload ... 👍

[@AHMADSHAHEEN-t7u]

​@@civilmdcSir, please reply, I am in urgent need of these files

[@skillhnter1303]

JAZAKALLAH

[@randyhinojosa9811]

Dear M Hussain, thank you for your dedicated time and explanations, the download access to excel sheet doesn't open, could you fix it please.Thank you.

[@civilmdc]

Issue is resolved ... now you can download (link is given in the description) if you still face any issue, please let me know.

[@randyhinojosa9811]

@@civilmdc Thank you very much...

[@civilmdc]

@@randyhinojosa9811 welcome

[@AHMADSHAHEEN-t7u]

​@@randyhinojosa9811Sir, please provide links to download the excel sheet

[@AHMADSHAHEEN-t7u]

When I click on the link for the download process, I do not find the Excel file. Please update the links

[@solankijigar]

Sir can you tell me that for 1st and 2nd mode, what should be the maximum value of Rz from which we can say that structure is not under torsion !!!...is there any provision in asce7-16 regarding the same ???...please help me

[@civilmdc]

I only know that method, Which is I have shown above

[@solankijigar]

Can you give link to download ASCE7-16 ?

[@civilmdc]

Dear link is given in the description of video.... Please check.... If you still face any issue please let me know

[@AbdulWahid-lt7uw]

bhai ASCE 7-16 book krna send mil ni rahi

[@civilmdc]

Please visit civilmdc.com and you will easily get. If you face any issue, please let me know

[@AbdulWahid-lt7uw]

@@civilmdc thanks bhai mil gae thi book

[@civilmdc]

@@AbdulWahid-lt7uw Welcome

[@dhanajaybhavsar9721]

How to design basement wall in etabs

[@civilmdc]

Only one new loading comes for the Design of basement walls... Soil loads... Rest for the Design of walls is same.

[@TheNOMANDAR1]

AOA.Sir you have any series about SAFE 2016

[@civilmdc]

W. Salam Yes.. Here is full course link kzbin.info/aero/PL0h14oMuZXQ6l-O7aqF0hYsZbyJ7eFt1H

[@TheNOMANDAR1]

@@civilmdc So Kind you are. Allah bless you

[@civilmdc]

@@TheNOMANDAR1 Ameen... You too.

[@AHMADSHAHEEN-t7u]

​@@TheNOMANDAR1Sir, please provide links to download the excel sheet

[@AHMADSHAHEEN-t7u]

​@@civilmdcSir, please provide links to download the excel sheet

[@zainulabidin2295]

Sir kya primevera p6 ka lecture urdu ma mil saktay han

[@civilmdc]

Sorry dear... I have in English only.

[@Dr_Mike_US]

@@civilmdc Sir its the Era of English. Upload your lectures in English so that people across the globe take advantage of it. Thanks...bro

[@civilmdc]

@@Dr_Mike_US Agree

[@ibadkhanbj1268]

Please sir speak urdu

[@civilmdc]

Dear bro, May be in future i will try, but right now i am focusing on lectures in English language.