CSI ETABS - 09 - Story Drift check as per ASCE-7 16 | Part 3
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- เผยแพร่เมื่อ 28 ส.ค. 2019
- In this lecture, Story Displacement, Story Drift and Story Drift Ratio Check as per ASCE Part 3 is discussed.
1- Story Displacement, Story Drift and Story excel sheet
Download: civilmdc.com/2020/03/09/story...
2- Uniform Building Code (UBC 97), Volumne I, II and III
Download: civilmdc.com/2020/03/09/unifo...
a) STORY DISPLACEMENT is the lateral displacement of floor or point from its original position.
b) STORY DRIFT is the lateral displacement of one level relative to the level below.
c) STORY DRIFT RATIO is the story drift divided by the story height.
Code requirements
The Maximum Inelastic
Response Displacement, Delta m, shall be computed as follows:
delta m = 0.7 R* delta S
EXCEPTION: Alternatively, delta m may be computed by nonlinear
time history analysis in accordance with Section 1631.6.
1630.10.1 General. Story drifts shall be computed using the
Maximum Inelastic Response Displacement, delta m.
Calculated story drift using delta m, shall not
exceed 0.025 times the story height for structures having a fundamental period of less than 0.7 second. For structures having a fundamental period of 0.7 second or greater, the calculated story drift shall not exceed 0.020 times the story height.
As per UBC -97 Code
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Very thankful to you for such a nice video series on Etab. YOu are doing great job.
It's really great !!! Many Thanhs
very fantastic work you are doing , otherwise in youtube other vedios are from starting taking too much time,, you doing direct check after applying load also check with code not wasting time very nice
Hi... a question about checking story drift in the UBC 97 video Seismic load were used for calculation of displacement while in the ASCE method Seismic (drift) the results of displacement were different. Can you explain
the difference and which one to use?
How do I obtain diaphragm chords and collectors forces within a floor and apply force in Etabs? Can you send me the steps?
While checking soft story, story displacement, torsional irregularity, what should be the stiffness modifier for the frame sections? Is it for serviceability or for ultimate load conditions?
Thanks for the video. May I ask why you use the Story Max/Avg Displacements data instead you use Diaphragm Center of Mass Displacements( like AUBC 97 video)?
Thank you very much, sir. I did a subscription
Thanks 👍
How about serviceability of Wind Load ?? Is it same way to calculated for wind load serviceability of wind load effect?
Is it necessary to use these excele sheets when etabs itself giving the value of story drift?
Well done dude.
thanks
Great Video. Sir how can we design spiral reinforcement in columns?
Yes dear we can design spiral reinforcement....
When we define column.... In the reinforcement section.
.. Select spiral instead of ties.
Sire I put the high of story in mm or in meter ? When I assign the high of story in meters in this sheet the results be Unsafe , can you explain that please ? Thanks a lot
Sire . Are these sheets can Applied on the steel structure building?
Checking drift shall be according to the ultimate design combination ? Please correct me if I am wrong
God Bless
Thanks.... you too.
Alsalam Alikom, please can u make wind drift check and its limit
Please clear my confusion.....etabs showed story drift ratio of 0.0029...but when it was solved in spreadsheet drift ratio was 0.013.....Why are both values different.....I have modelled my own building I have encountering the same issue...
When I click on the link for the download process, I do not find the Excel file. Please update the links
Hello sir, i have a questions:
1. You defined your seismic as UBC97 but you checked the drift based on asce provision. Is that okay?
2. If i checked it using asce, should i also countercheck it using UBC97? (Checking drift using both codes(ubc/asce))
Thank you, and a very nice tutorial :)
Yes I did..... ( and you can also apply any method against earthquake conditions)
And I have shown with both methods.... With UBC 97 Drift check and ASCE-7 16
and you have to check only with one method... Which ever suitable to you....
I have shown with both methods for demonstration purpose.
I see, thank you for enlightenment, and for your great tutorial,
@@hansenm6910 Welcome and thanks for your feedback.
@@hansenm6910Sir, if you have the excel files, can you send them to me?
@@civilmdcSir, if you have the excel files, can you send them to me?
Sir, can I get the excel sheet?
Dear link is given in the description of the video...
Please check.
If you face any issue please let me know
hello,
how to define in Etabs that the bracing of my building is provided by concrete frames when we don't have reinforced concrete bracing wall
Provide diagonal members.... It will consider the behaviour as braced frame
@@civilmdc i have a concrete building, should i release moments at the start and end of columns or beams ?
i dont want put diagonal members, the bracing is provided by free-standing reinforced concrete portal frames
@@tolist-k1w No....
For diagonal bracing with hydraulic dampers.... Moment release will be considered
@@civilmdc is there any video to check hoe can i make it?
👍🏻
Salam Alykom Sir, thank you so much for your lectures really good content
Regarding special or intermediate concrete moment frame, what is the difference? Is there a difference when modeling in Etabs?
Kind regards
We use Response modification factor for intermediate, special and ordinary moment resisting frame.....
Rest we do reinforcement detailing by Following the code requirements.
W. Salaam
Thank you for replying
You mean the inertia modification for walls, columns and beams in etabs? If yes which Cd value should I choose for frame moment resisting combined with shear walls?
@@baselaljebali2274 No
Cracked moment of inertia is basics ...
....
I mean Response modification factor R
See Google
Ohh i see, how can I identify if my frame moment resisting system is either special or intermediate or ordinary?
Do you have CivilFem 2018 or 2019?
It is present at www.civilmdc.com
@@civilmdc could you please share it? 🙏
@@TonyA-ex1sj dear it is version CivilFEM v 12. I do not know exactly the year.
@@TonyA-ex1sj please visit www.civilmdc.com you will get that software, it is present on the front page.
@@civilmdc Thank you, however I am looking for a recetlyversion. Anyway, thanks again.
pls overturning and sliding check video for part 4