ETABS Tutorial (8. Design of Beam using ETABS, Excel sheet, Theory Explained)
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- เผยแพร่เมื่อ 20 พ.ค. 2018
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![How to Analyse a Simple Supported Beam in Etabs #5 [Pts CAD Expert]](/img/n.gif)
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I have learnt sooooo much by watching ur videos for a while now.....keep up the good work Shaan
Thank You
You can follow the link in description section of the video to download all the excel sheets and cad files. Its all available for free.
Sir u r the best 👍
good job brother... keet it up
Thanks you so much for your sharing with bundle grateful.
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Thank you sir
Your teaching skills are so excellent ......and your way if teaching are very good...
Thanks a lot
@@fitwithshaik welcome sir...
Sir ,Could you please provide me the excel sheet of footing column beam and slab design.... please sir.....if it please possible please send me a mail on this : krajatkashyap@gmail.com
What's number: 8602424230
Hello Sir, do you know reason why csi details not give rebar on beams but slab, column and wall it give reinforcement. Any mistake on beam
I don't use it to generate reinforcement details. I do it manually because that will better accurate and economic for real life construction
Sir, in the Excel sheet prepared after getting reinforcement details comprising of Top steel, bottom steel and top steel (at supports), top and bottom steel reinforcement is calculated by max positive BM and negative BM. But how is the Top rebar at supports calculated sir?
Please help.
Regards.
For beam top rebar at supports is calculated by using BM at the near the supports. Which wil be negative BM.
Once again an amazing video..Sir i wish to register for the online course for G+15 structures where i can learn dynamic analysis as well..pls let me know if there is such a course available..i would be more than willing to enroll in it...Thanx !
Divy Jain, we have now started a beginner course only. And we are planning to have advanced courses soon. We will inform you regarding.
One questoin sir: what happen when top rebar (negative bm) is large value and during designing, if it becomes doubly reinfoced section, how do we provide in such case??? in this video, SRS, so there is no problem. but what can we do in that situation if happen?
How to calculate area of steel for negative bending moment at support if beam in over reinforced or double beam ?
Same way u find it for positive reinforcement. Just that in the Excel sheet u have to enter the corresponding negative BM value
Hi I have some questions:
If we have a multiple span continuous beam, don't we need to consider different span having different load case combination, in order to find out the worst case?
For example, if we have a 3-span continuous beam A-B-C-D, each span is of the same length, the most adverse sagging moment in the middle span BC would occur when:
Span AB: 1.0DL
Span BC: 1.5DL+1.5LL
Span CD: 1.0DL
If all 3 spans are experiencing the same 1.5DL+1.5LL, the sagging moment in the BC span would not be the greatest.
Can we do that in ETABS?
First of all, I would like to appreciate the question you have asked.
Secondly, as far as my knowledge I don't think etabs automatically can do and check it. Moreover in for 4 to 5 story we don't check it. And also the factor of safety we consider while designing is sufficient enough to take care of this effect.
U can do it in etabs by defining pattern load
Sir if we design the structure in ETABS itself and get the Ast values then how much those values will get differ from the values you have calculated manually? Do they differ much or from a lesser amount?
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Sir what about top extra and bottom extra bars?
Do they come in Ast/Asc(provided) or we have to provide it apart from the required steel?
They come under ast/asc
Extra bars are provided to achieve the increase area of steel required at the ends in beam. As at ends of fixed beam, moment value wil be greater.
@@fitwithshaik Ok sir, so, for example, if for the bottom of beam Ast = 600 mm^2 (as per calculated in ETABS) then the extra bars, as well as main bars, will come under 600 mm^2.
Am I right?
U prefer top rebar support at top only..why did not consider bottom rebar at mid portion because negative moment will occurs mid portion also ?
In middle portion of beam there is sagging moment, that is positive BM.
Share the video of design of first storey beams which are designed as t beams
sir
i have two questions
1. can we use doubly reinforced beam at lower levels of floors to have better stability.??
2. sir how did u prepared that excell sheet??? from the etabs directly or by seperately???,
1. I don't think, there doubly reinforced beam is related in anyways to stability and usage of it in lower or upper levels of building. Doubly reinforced beam are just used wen beam depth is limited, so have to design beam as double reinforced beam.
2. I have prepared it separately.
Sir, I'm learning etabs right now, how do I know the structure I've designed in etabs is safe or not in etabs itself.
In ETABS we analyse the building. And get the values such as BM SF, LOAD ON COLUMN, etc for design purpose. And we design different members such as beam, column, slab , footing, etc based on the IS CODE . So ofcourse it wil b safe. IS code limit state method which we usually use nowadays is derived keeping in mind the safety.
Sir, two questions I had.
1. Difference between modelling individual beams for each of the individual spans and modelling a continuous beam as shown in the vedio.
2. Sir, you had we always design for under reinforced beam. My question is , is it in our hand to design beam as under reinforced or over reinforced or it depends upon material behaviour.
Thanks.
1. In result there won't be much difference. But for better reality (as beams as casted continuously in field). And also, if u take one by one beams, number of beams will increase drastically, but whereas u draw a continuous beam, total number of beams will reduce. And also, in sight for normal building cases, we provide same number and size of reinforcement throughout a continuous stretch of beam, so by taking the max. Negative and positive value of the continuous beam drawn in etabs wil do the job for designing reinforcement quicker. Or else u wil have to take each and every single beam and then find its reinforcement details and finally to suit the construction at sight, u have decide a common reinforcement detailing. If there is very high variation in the reinforcement value u obtain for different sections, then u can provide different reinforcement details of different sections of a beam. This case usually only comes up when there is unusual high load on span only.
2. It is in our hand to design under or over reinforced beam. But due to the property of RCC beam if we design over reinforced beam then failure of beam wil be without any warning and sudden and dangerous. Thats why it is said to RCC beam as under reinforced only, so tat if failure is there. Steel fails first and as failure of steel gives warning.
And as far as design is concerned I think we are taught design of under reinforced beam only.
@@fitwithshaik thank you for such a detailed and simple understandable reply. Loved it. Also excellent work in the vedio series. I'm loving it.
Big Thanks for clarifying my doubts.
@@fitwithshaik Good explanation consultant 👌👍.....u had said it in the video also
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Sir I am learning Etabs, please can you send me the excel sheet for Footing design please.
Follow the link in discription section of video.
why are you assuming the dimension of the beam in the design part?? you already assigned the dimension while modelling...
While modelling, I have assigned a priliminary dimension for modeling purposes, which can b changed while designing. This is assigned so that etabs could calculate the self weight, and other parameters which is required while analysis.
I am not able to understand some of the formulas that you have used in the excel file. Like Mulim formula. And some of the formulas are such that there is no value in the blocks. Like E42 there is no value and formula contains E42
You can create your own Excel sheet. Wat matters is the concept.
Sir which code you using
Indian Standard code
pls share all the excel files on below id