CSI ETABS - 06 - Building Eccentricity Check (Irregularity check)
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- เผยแพร่เมื่อ 10 ส.ค. 2019
- In this video discuss about,
Center of Mass (CM) and Center of Rigidity (CR) in ETABS
1- Building Eccentricity Check Excel Sheet
Download: civilmdc.com/2020/03/09/struc...
2- Center of Mass (CM) and Center of rigidity (CR) Excel Sheet
Download: civilmdc.com/2020/03/09/cente...
What is center of rigidity?
Center of rigidity is the stiffness centroid within a floor-diaphragm plan.
Center of Mass
It is the average position of all the parts of the system, weighted according to their masses
Check in CSI ETABS
During analysis, ETABS automatically calculates this coordinate for each floor diaphragm. The diaphragm assignment must be present in the model. Center of rigidity and center of mass are then displayed by selecting Display --)) Show Tables --)) Analysis --)) Results --)) Structural Results --)) Centers of Mass and Rigidity --)) OK.
Reference CSI Technical Knowledge Base
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Very thankful to you for such a nice video series on Etab. YOu are doing great job.
I appreciate your hard work. God bless you...!
brilliant work. Plz, carry on. plz do a video on the design of retaining wall in etabs
jazakallahu khaira sir I learn lots of things by watching u r video sir
Bro i am a big fan of yours you have h great sound knowledge of civil engineering you are doing a great job for all the structural engineering students
Love u bro
Thanks Bro
say ex/Dx = 14% , will you change the eccentricity in model for Ex & Ey or just take values from torsional irregularities check?
i cant find this section of this code D.3 buillding controlled .....
please can you tell me the page and the name of the code wich metioned in your video
Thanks Hussain..excellent tutorial
Welcome... And thanks for the appreciative feedback
@@civilmdc Hello Hussain...I hope you doing well..the clause which you have mentioned as per ASCE is oK..is there any clause in UBC-97 for the eccentricity check. I tried to find out what I see is the accidental eccentricity is given which is 5%...Could you please let me know have you came across the clause for the center of rigidity in UBC-97..I appreciate your response.
hussain bhai eccentricity waly lecture me "dy"jo distance hai excel sheet me not ok araha means not less than 15%. iski kia wajha hai kia issue hai designing me?
JAZAKALLAH
Welcome ❤️
thanks
Welcome.... And thanks for your valuable feedback.
Thanks brooo
Welcome 😇
Which ACI code are you referring here? Can you provide the link please
It is ASCE-7 16 code....
Please visit www.civilmdc.com and you will get it.
If table C.R is not available in output etabs, what is wrong? My Analisis is incorrect or my model is wrong? And what definitions is C.R?
sir shall we take that eccentricity value and add it to our seismic load pattern ?
How to accommodate eccentricity... .. see next lecture..
How about for structures with irregular shape? L SHAPE, CIRCLE, ETC.... TY
Will be applied in same way
@@civilmdc should we convert into rectangular shape then put the x and y dimension?
Thank you
Can you do a course on excel for civil engineers? It would mean alot
And also autocad for civil engineers
Noted with thanks
What if eccentricity results is not okay? And why there is need for check eccentricity?
With presence of eccentricity....
Forces amplify....
Solution...
You have to increase the column sizes ... On that part of the building ... Which is week ....
Or you can provide ... Shear walls
Does Indian code have any restrictions on max eccentricity?
Dear bro, eccentricity result amplification of forces, we should avoid by adjusting structural elements....
PLEASE READ THIS....IS 1893 (Part 1): 2002, Clause 7.9.2.
@@civilmdc I have gone through the codes it gives some formula for eccentricity but it has not mentioned any maximum or minimum values to be exact . Thank you
What to do if the eccentricity of the structure is more than 15%. THANKs. Also the content is super helpful.
You have to re-arrange structural members
Or place the concrete wall on other sides
What if ex/dx or ey/dy is greater than 1.5??
See this complete lectures... And next 2 lectures... You will get the answer
Sir how it works on excel. Please give all the details how we can work on excel so that calculation will done automatically.
Dear
All is discussed in the video...
And excel sheet is attached in the description of the video..
@@civilmdcok thanks sir, please also upload the videos on staad pro tutorials.
Your videos are very helpful and informative.
I learned full etabs with the help of your videos.
@@shreyakhandelwal8853 Thanks for the appreciative feedback.
wasn't it supposed to be XCR-XCCm... why did u do Xcr-Xcm only...
sir if the percentage increases more the 15 than what should have to do
You have to re-arrange structural members
Or place the concrete wall on other sides
@@civilmdc ok sir thank you
Dear br. how we get these worksheets
Dear, these all sheets are attached in the description of each video...
Kindly check...
If you face any issue please let me know.
@@civilmdc it means we have to make these worksheet by our self
It means we have to make these worksheets by our self
@@TheNOMANDAR1 You can download from the description of this video .... and you must have to apply checks to your building
@@TheNOMANDAR1 You can download from the description of this video .... and you must have to apply checks to your building
what if the diaphragm is semi-rigid.
Then you will not get results.... you can try and check
M Hussain I have tried that’s why I’m asking normally we use to assign diaphragm as semi rigid
@@syedsohail1324 Dear, Normally we assign our slabs rigid diaphragm ... (almost 95 % our slabs are rigid.)
@@civilmdc To consider torsional irregularity we need to assign diaphragm as non-rigid ( semi rigid )
BRO The entire column under XCR and YCR is empty, the values are not given. why could it be?
Watch full video..
I have discussed this issue in ETABS.
Here is the full course link
th-cam.com/play/PL0h14oMuZXQ5PXbux0l80ox-8gPwcBl5c.html
@@civilmdc got it, it was just a single tick ☺ Thanks
@@abdulzahiraliyi8675 hey brother can you plz tell me how XCR & YCR column could be filled
@@PG-zc7gm when you click on 'analysis' there is a small box which says "calculate diaphragm center of rigidity" click it and run analysis
@@abdulzahiraliyi8675 thanks man 👍
Text u