Advanced Response Spectrum Analysis in Etabs | IS 1893:2016 | Part-1
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- เผยแพร่เมื่อ 2 ต.ค. 2024
- #Response_Spectrum_Analysis #IS_Code #Time_Period
Along with detailed explanation this part covers -
1. Calculating building time period,
2. Define Modal Case,
3. Define Response Spectrum load case,
4. Calculation of Scale Factor for Acceleration to match Dynamic base shear with Static Base Shear.
#Correction : The Area of wall calculation in Time Period Calculation will be =Length X width of wall, Not "Length X Storey Height". As it is Cross sectional area of wall.
Next part will be uploaded soon in sha Allah.
Join as member to get resources used in the tutorial. To be member click the link given below- / @decodebd
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Related Tags:
Calculate building time period,horizontal acceleration for Response Spectrum,Scale Factor for Response Spectrum Acceleration,match Dynamic base shear with Static Base Shear,Static Base Shear,Dynamic base shear,Modal Case,Response Spectra Analysis,Response Spectrum Analysis,IS Code,Time Period,building time period,Response Spectrum Analysis in Etabs,Etabs v18,csi etabs,Modal Analysis
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In calculating the Aw (area of wall) you cannot multiply its length with its height (you did 3.25 x 3.5=11.375m2). It is clearly stated that Aw is the effective cross sectional area of wall in first sorey of building, therefore you should have multipiled its length with its thickness, not with its height. (so 3.25 x 0.3 =0.975m2) this value you should have been using.
Anyway good job.
Yes, you are right. I missed that word "Cross-Sectional". Thanks for your valuable notice. I am giving a note for correction in the description.
Also correct the scale factor.
The scale factor Ig/2R is required only for versions before 2017. From 2017 version of etabs the I/2R is included in the function itself (we need to specify Z,I,R during defining the function). So now the SF to be used is just ''g'' in appropriate unit
How to define vertical function in etabs 2018
Yess you are right.
He did mistake
The value of Z,I and 2R already in spectrum function.
Thanks for the point I missed. That's why it is said, "You try to share your knowledge, people may help you to improve it ".
Can I be provided with the CAD file and Excel sheet?
Sir, while defining LOAD CASE : RSx ,
in LOAD APPLIED. Can we account the effect on RSx by 100% x-dirn load and 30% load on y-dirn?
LoadType LoadName Function ScaleFactor
Acceleration U1 IS2016h 100%*(9806.65)
Acceleration U2 IS2016h 30%*(9806.65)
and similarly for defining LOAD CASE : RSy ,
in LOAD APPLIED. Can we account the effect on RSy by 30% x-dirn load and 100% load on y-dirn?
LoadType LoadName Function ScaleFactor
Acceleration U1 IS2016h 30%*(9806.65)
Acceleration U2 IS2016h 100%*(9806.65).
And on NEXT ITERATION
for RSx:
LoadType LoadName Function ScaleFactor
Acceleration U1 IS2016h 100%*(Multiplying Factor for U1*Previous ScaleFactor)
=a
Acceleration U2 IS2016h 30%*(Multiplying Factor for U2*Previous ScaleFactor)
=0.3b
Similarly on RSy:
LoadType LoadName Function ScaleFactor
Acceleration U1 IS2016h 30%*(Multiplying Factor for U1*Previous ScaleFactor)
=0.3a
Acceleration U2 IS2016h 100%*(Multiplying Factor for U2*Previous ScaleFactor)
=b
(Here, ScaleFactor for U1=BaseShearEqx/Shear for RSx,
ScaleFactor for U2=BaseShearEqy/Shear for RSy).
Kindly, answer this regarding IS codal provision on this accounting for seismic load of 100% in one direction and 30-40% in orthogonal direction. ThankYou from Nepal.
we use 100% in 1 direction and 30% in other direction only when we have non orthogonal frames rit. I mean when we have column oriented in 45 degree or other degree.. Here all columns are orthogonal. No need of going with that 1.5dl + 1.5 ( eqx+0.3eqy ) combinations.
@@akshaykamath1190 thank you. Can you provide me references on Non Orthogonal frames?
I always look forward to ur tutorial.Really in love with this channel.
Glad you enjoy it!
Thnak you sir. Please make more tutorials for IS codes. It would be highly helpful if you make tutorial of IS 16700-2017
Will try for that also in sha Allah.
Please Share the excel sheet u have used.I need for my project work please
@DECODE BD thanks for tutorial.
For scale factor calculation which analysis shall be calculated? service un-craked model or cracked model for design? pl update
Always amazing ,thank u
Could u plz explain how i can Defining the ( Inelastic Response Spectrum) in ETABS function ?
Sir, can give new tutorial about how input FPX Diafraghma to obtain Axial Force in Collector beam and chord?
I think you should also perform the response spectrum analysis in Robot Structural Analysis and then compare the results with ETABS and what are the reason for these differences?
Please make videos for vertical earthquake as per is1893 2016 Eqz and how response spectrum analysis account for Eqz .
thanks
please can we get excel files?
Greet . its required to complete the load combination especially 100 + 30 rule and considering as last part in order to consider it as complete reference for response spectrum. Waiting your reply
100% of Response Spectrum Along one direction and 30% of orthogonal direction to be included in any combination associated wit RS load cases.
Check part-2
Awesome video
Well I am a member and I subscriber and still I can't get access to that excel sheet.
What's wrong ?
Drop your mail address & mention which excel you need. I will send you in sha Allah.
DECODE BD Jazak allahu khair
very good tutorial. keep going !! Looking for more updates .
Thank you
Very informative video. Please share excel sheet as well
kindly provide excel sheet for response spectrum analysis.
Please make detailed video on different load combination used for high rise design with service load (as per IS code)
Noted
Sir,
Kindly send me word file and excel file for this response spectrum analysis part 1 - 2, also semd me for storey drift check
Sent
Sir.. please send material used in this tutorial.thanks
If I use 1893:2002 function, which is my default scale factor?
9806.65(default) or Ig/2R(980.66) ?
In a model I am creating, RS value is coming 4 times than the static value at default 9806.65 factor
I am using Etabs v19, IS 1893:2002 fucntion (since safe 2016 does not have 1893:2016, I have to use 2002 for foundations)
Hello sir,
Please prove me building check and time period IS 1893-2016 excel spreadsheet
Get at the Resource page of decode-bd.com
Sir can you please share the excel and word file please
What if my rsx value is zero...?
Sir I have followed the whole method of response spectrum analysis as u showed here... but after running the analysis the base reaction in Fx and Fy direction due to RSx and RSy is showing 0 value... sir please guide...
Hello sir...it was really awesome....i would like to ask something about ur member subscriptions...can a member having donors fans subcription of rs 159/month get the access of excel sheets, autocadd and etabs file? Plz reply
Sir please make video on Modelling Tuned Mass Damper in ETABS or SAP2000
Respected Sir,
If vertical response spectrum is not present in seismic code of design, then out of these two function, which function should be used in linear time history analysis
1) Scaling of vertical ground motion time history as 2/3 of horizontal response spectra.
OR
2) Scaling vertical ground motion time history as only horizontal response spectra.
Looking for your guidance and support.
Thank you.
Why you don’t include orthogonal combination U1,U2....U2,U3
sir, in the calculation of number of modes i didn't understand how the degree of freedom is taken as 3? In the lesson 13 storeys x 3 degree of freedom was multiplies. i didn't get this concept.
THE VIDEO IS VERY GOOD AND EXPLAINED IN DETAILS. THANK YOU SIR FOR THE VIDEO.
2 Translational (Along X & Y Axis) & 1 Rotational(About Z Axis) Movement/Mode is possible for each floor. So each floor has 3 Degree of Freedom.
@@Decodebd okay sir. Thank you. 😊
In etabs 18 v1.0 I couldn't filter the results as you did in 17:58 ,when I want to filter the results ,the program gives me a message says that "this field is not for import"
Will i have to always do this process in every structure?
No. According to IS 1893-2016 if your structure falls in zone 2, 3 and 4 and in zone 2 above 15m you should do dynamic analysis. It again depends whether the client is intrested or not. For high rise building we do dynamic analysis, if small G+3 we don't do, Static Analysis will suffice.
Why do I get base shear / base reaction for Response Spectrum cases as 0 when analysed for the first time?
JUST ONE TO ADD SOMETHING NEW TIME PERIOD FORMULA HAS BEEN REVISED AS IT IS COMPLETE SQUARE OF BRACKET SO ALL VIEWER PLS MAKE NOTE OF THE SAME.
sir i want excel calculation sheet
Make video on modal contribution of response spectrum analysisi
sir could you pls share excel sheet
Can you please check scale factor given for RSA? Since the referred post is in 2012 and ETABS 17 version onwards we are already giving values of I and R.
Can you please share the Excel sheets for Response spectrum analysis
Sent whatever shown in tutorial.
WHERE CAN I GET THE EXCEL SHEET OF THIS
I saw your video it was nice and helpfull.
Wheather you have posted any video regarding checks to be done after the analysis ???
Very Informative... Shukran....
Most welcome
Why we haven't added acceleration Ux and Uy in model cases...
Study of lateral load resisting system of variable height in all soil types of high seismic zone using etabs software
Sir can you do a tutorial based on this topic?
How do u filter in table?? i am not being able to do that without going on the filter menu
Can you please share the link for Excel and and word file
Great work, May you share with me the documents specially excel sheet. your effort is highly appreciated
For that you need to join as member to support the channel.
@@Decodebd how can we be member sir
@@Decodebd I just joined how can I get excel sheet
@DECODE BD please send it i want to do practise
Can get excel sheet please
Values of scale factor for U1 and U2 are coming 12846.7115 and 15102.241 respectively, by the calculator. @21:00
Whatever it is, the procedure to be followed.
plz the axial sheet ?
Dear sir,
I have seen your video and I found it very useful my concept about RSA is now clear, I would like to tell you that currently, we are working on a high rise structure in which we are considering wind gust for this I have searched on TH-cam and I found that there is no video on wind gust so it will be very useful if you will teach us about wind gust thanks a lot for making such useful videos
Great work Bro. Just so you know, I really enjoy and appreciate your tutorials.
Glad you like them!
Very nice video. Thank you for the information. I think the formula for Aw is amended in amendment no. 1 in the last page of the code.
Thanks sir,please share Excel files in next Tutorial and if u can do the same problem by Euro code
How do i join two align beams in Etabs as a one member, if one beam is inclined from say plane A to plane B and other is in plane B?
excel kaha se milegi bhai
Can you please share the Resource files
Drop your mail address. I will send as you have become a member.
You are amazing wating for more videos on is codes
Thank you very much sir.Your tutorial has helped us alot.Lots of respect from Nepal🇳🇵🇳🇵🇳🇵
You are most welcome
When to select eigen when to select ritz?
Check the previous tutorial on "Basic of Response Spectrum Analysis "
Sir, I am aleady a member.. how to get resources
Sir i need building checks sheet
Mail me at humayun.afec@gmail.com
could u plz .. send a part 2
thank u a lot
Hello Sir!
Can the static base shear values be negative?
SIR,I LIKE UR VIDEOS VERY MUCH.IT HELPED ME LOT
Sir
Please provide the excel sheet also for dow
Your tutorials are really great. It helps a lot . Thanks for this.
I hope if you have time , please make videos on revit.
please sir , can you send me the excel and word file for this vid
thank you so much btw
Visit the website- decode-bd.com/ Check there Resource Page.
Please sir .. share the exceel sheet
Sir can please tell me how u got the value @3:03( in video) that is 2.339.....if we cal. It acc. To formula then this will be 12.083...can u please ans. Me
#Correction : The Area of wall calculation in Time Period Calculation will be =Length X width of wall, Not "Length X Storey Height". As it is Cross sectional area of wall.
One more doubt.... @5:08 the sum of affective are i.e Aw = 17.417 how this value will come...?
@@Decodebd the value of Aw is 15.871 summation of all Awi =(4.678+2.112+5.948+3.079)=15.817 ??
Sir can u plzz tell me why we do response spectrum?
Check previous tutorial named "Basic of Response Spectrum Analysis".
you haven't mentioned about RS-Z. How can we do that?? plzzz mention that in ur next lecture
Part-2 includes it.
i will wait for the 2nd part
Thank you sir
Welcome
Thank you sir ,your video really help full for me.can i get excel sheet which you used in video?
pratap.shelar1111@gmail.com
Sent
Can you send me the excel sheet
Appreciate your hard work. Please make videos for vertical earthquake load (static & dynamic) as per IS code.
Thank you.
Part-2 will include that in sha Allah.
Thanks.
Bundle of thanks for such videos. Please do the same problem using ACI codes
Wc. Already done before, in future will do with more details with ACI also in sha Allah.
@@Decodebd thanks alot
Very nice tutorial and explanation is well done 👍👍
Glad you liked it
Thanks for explaining the concept clearly. Can you share me the resources used for advanced response spectrum analysis?
Sent
Can you please send the resources used in response spectrum analysis please
bhanu.ce@gmail.com
Pls share the Excell sheets, that would be really great. Thanks for the clean video 👍😁
At least do something on your own
@@upaharpoudel4112 ok
Please follow BNBC code. It will help Bangladeshi engineers
much.
You may notice that I am trying to help all. Frequently I am doing on different codes. Will do same on ACI/BNBC also in sha Allah. And if you know different codes it will increase your engineering judgement. So don't ignore any tutorial.
@@Decodebd But as a fresh Bangladeshi engineer Bnbc code will help us most. I hope there are many Bangladeshi engineers in your page. Obviously, your tutorials are so helpful and we are learning various codes.
Yes, for Bangladeshi Engineers ACI/BNBC is mostly needed. You may have seen wind loading on shed and previous lots of tutorial done as per ACI/BNBC code. RSA also done with ACI/BNBC code. Waiting for the updated code that will be approved. So please give me some time to help you all.
@@Decodebd I request you to make a tutorial on different codes like BNBC, IS...... This will help us to confirmly use these codes and give a depth of knowledge about codes. This will help us to apply in various civil Engineering software.
Hello Sir, I hope you are doing well, Could you please send me these files. Thank you.
Drop your mail address here.
@@Decodebd gurramvinod.yadav@gmail.com
waiting for your response sir, Thank you! @DECODE
what is the width of the shear wall?
Sent
Very helpfull sir...keep it up
Keep watching
Nice turtorial sir...
Thanks
Plz give Excel sheet
Please join as member to support the channel.
please share the pdf or excel doc
Please join as member to support the channel.
@@Decodebd please share the resources file
Nice info sir
Thanks
Excellent
Thanks
💯💯✨✨
Please verify the height h= overall height of building as shown in fig 5 of same code
thanks and regards
Sir,
please send me an excel file including Time period and scale factor, drift check and torsional irregularities check. Thank you.
Sent