5 parameters to check an ETABS modeling

by
5 Parameter to Check in ETABS After Modeling and Analysis
5 Parameter to Check in ETABS After Modeling and Analysis

As a structural engineer, we also are asked to review the ETABS Model especially once you are the senior or head of the department or as a 3rd party checker. this is often to make sure that the planning shall meet all the relevant standards for safety, durability, and serviceability before submitting for authority approval.

This article aims to offer you the overall idea of the essential Parameter checks and basic requirements that must be considered in reviewing an ETABS model.

  1. Check for, Maximum Displacement in etabs

  • Go to the Display tab menu
  • Select Story Response Plot
  • Select maximum Story displacement from the display type
  • Select EQx from the Load case and Check the maximum value
  • If it is within the Limit then its ok
  • Again select EQy and Check the maximum Value if it’s in the limit then okay.
  • Formula to check Max displacement=Building total height X 0.004 (from code)X1000 mm

  1. Check for, Maximum Drifts in etabs (IS 1893 part 1 ,peg28, Clause 7.11.1.1)

  • Go to the Display tab menu
  • Select Story Response Plot
  • Select maximum Drift  from the display type
  • Select EQx from the Load case and Check the maximum value
  • If it is within Limit then it’s ok
  • Again select EQy and Check the maximum Value if it’s in the limit then okay.
  • Formula to check Max drift=0.004 mm
Check for, Maximum Drift in Etabs
Check for, Maximum Drift in Etabs

Note: If  our Result Exceed maximum Limit Then Change (increase) Section Property of Beam  or Column then Check again using same method.

  1. Check for, Model Participating Mass Ratio in etabs

  • Go to the Display tab menu
  • Click on Show Table
  • Select Analysis Result
  • Select Structure output and expand
  • Select Model information and expand
  • Select the Model participating mass ratio
  • Click on OK,Now you have seen the table check :
  • We Need to Check the time period, UX, UY, and SumUX (I.e. modal mass prt. Ratio) on the 12th

 

Check for, Model Participating Mass Ratio
Check for, Model Participating Mass Ratio

  • Check for Sum UX (Modal Participating mass ratio)

-It should be always greater than 95% (ie. Value should be above 95) in 12th mode.

  • Check for Time period

-It should be a Normal value that is if it is shown in 0.00X value it is not Valid it is abnormal.

  • Check for UX & UY (to avoid torsion)

–We need to check Mode1 and Mode2 Value in Criss-Cross, If any one group of them crosses 40% Value in any one then it’s Ok.

Check for, Model Participating Mass Ratio
Check for, Model Participating Mass Ratio

  1. Check for, Center of Mass Rigidity XCR & YCR Value

  • Go to the Display tab menu
  • Click on Show Table
  • Select Analysis Result
  • Select Structure Result
  • Check the Center of Mass of Rigidity Under Other Output Items
  • OK
Check for, Center of Mass Rigidity XCR & YCR Value
Check for, Center of Mass Rigidity XCR & YCR Value

Here there is Not Calculated XCR & YCR Value initially in ETABS so we need to calculated it manually, For this:

  • First Unlock your Model
  • Go to analyze tab menu
  • Select set load case to run
  • Check for Calculate diaphragm Center of rigidity
  • Click on Run Now Bottom
  • Wait for 100% to finish.


  • Now again Run analysis model.
  • And Check Center of Mass of Rigidity (XCR & YCR) Under Other Output Items.
  • If those Values not Exceed 5% in each Story then it’s OK.
Check for, Center of Mass Rigidity XCR & YCR Value
Check for, Center of Mass Rigidity XCR & YCR Value

  1. Check for Torsional Irregularity

According to IS Standard the ratio of Max displacement and average displacement should be less than 1.2.

$max < 1.2$avg                                                              ————–No irregularity

1.2$avg <= $max <= 1.4 $avg                                   ————–Irregularity

$max > 1.4 $avg                                                             —————— Extreme Irregularity

  • Go to Plan View and Select Top Story Plan
  • Go to the Display Tab menu
  • Select Deformed Shape

-Check Torsion in EQx Direction

  • Select EQx load case
  • Click any Joints and Calculate  it  for EQx Direction ( ie. Select joints in Y –Y-direction on tabs to get Value)

-(Avg Displacement = (11.275 +10.917)/2 = 11.096 mm =$avg

where, Max . Displace ment $max = 11.275 mm )

-Check, 11.275/11.096 = 1.016 <1.2 ———–( the model is not irregular in EQx)

$ max < 1.2 $ avg —– it is Safe

-Check in EQy Direction too.

  • Select EQy load case
  • Click any Joints and Calculate  it  for EQx Direction( ie. Y Select joints in X –direction on etabs to get Value)
Check for Torsional Irregularity in Etabs
Check for Torsional Irregularity in Etabs
Check for Torsional Irregularity in Etabs
Check for Torsional Irregularity in Etabs

 

NOTE : IF EACH CRITERIA ARE PASSED THEN START TO DESIGN

 

 

Post Views: 1,215

159 thoughts on “5 parameters to check an ETABS modeling”

  1. Pingback: https://telegra.ph/Technology-A-linchpin-To-Maintain-Businesses-Handle-Remote-Workforce-Amid-Pandemic---Technology-02-16

  3. There are actually plenty of particulars like that to take into consideration. That is a nice point to deliver up. I provide the thoughts above as normal inspiration but clearly there are questions just like the one you deliver up the place an important factor will probably be working in trustworthy good faith. I don?t know if greatest practices have emerged around things like that, but I am sure that your job is clearly recognized as a fair game. Each girls and boys really feel the impression of just a moment’s pleasure, for the rest of their lives.

    Reply

  6. I would like to thnkx for the efforts you have put in writing this blog. I am hoping the same high-grade blog post from you in the upcoming as well. In fact your creative writing abilities has inspired me to get my own blog now. Really the blogging is spreading its wings quickly. Your write up is a good example of it.

    Reply

  7. Undeniably consider that that you stated. Your favourite justification appeared to be on the web the easiest factor to remember of. I say to you, I definitely get annoyed while other folks think about concerns that they plainly don’t realize about. You managed to hit the nail upon the top and outlined out the whole thing with no need side-effects , other folks could take a signal. Will likely be back to get more. Thank you

    Reply

  21. I have been exploring for a bit for any high quality articles or blog posts on this kind of area . Exploring in Yahoo I at last stumbled upon this website. Reading this info So i am happy to convey that I’ve a very good uncanny feeling I discovered just what I needed. I most certainly will make sure to do not forget this website and give it a glance regularly.

    Reply

  55. You really make it appear so easy along with your presentation but I find this topic to be actually one thing which I think I might never understand. It seems too complicated and extremely huge for me. I am taking a look forward in your next publish, I’ll try to get the hold of it!

    Reply

  78. RTG casinos in general, and Cool Cat in particular, are popular destinations for hardcore slots players and video poker players because of the selection.Cool Cat Casino has over 100 slot games, so you can take your pick between classic fruit machines and the more complicated modern options. A 20x wagering requirement means you must playthrough your requirements 20 times before you can withdraw any winnings.Case: 100% up to £100 with a wagering requirement of x20.Bonus money example: Deposit £50 and get £50 bonus money. The wagering requirement is the bonus money multiplied by 20 (£50 x 20 = £1000).Deposit amount + Bonus money example: Deposit £50 and get £50 bonus money. The wagering requirement is the deposit amount + bonus money multiplied by 20 (£50 + £50 x 20 = £2000).
    https://bookmarketmaven.com/story15240188/play-poker-free-with-friends-online
    Casumo is a relatively new online casino targeting UK, German, and Scandinavian players that hosts a wide variety of games through NetEnt and supported by iOS and Android. Casumo Casino allows players to enjoy playing for fun or money, and offers a variety of incentives to join and continue to play. The Casumo Mobile App is enjoyable to use and quickly engages the user with their graphics and adventure storyline. The casino’s registration process is very engaging and shows three arguments to join today. The Casumo MobileApp is very well-designed and does not require downloads because it purely runs on HTML5 Flash. Casumo offers a ‘play for fun’ option allowing players to try-out games without logging into an account or having to download anything like a .apk file. The app can be download from the Google Play Store and the Apple App store. You can play it on smartphones and tablets and it gives players a wide choice of games to enjoy, the same selection that you can find on the Casumo Casino desktop site. If you don’t have an account with Casumo, you can join directly through the app. It will also let you deposit using the app and it’s perfectly safe to do so. Just remember to protect your device and connect only through secure Wi-Fi—the site is only as secure as you are.

    Reply

  142. Naszą główną ideą jest szybka, sprawna obsługa oraz zadowolenie naszych klientów, z tego też powodu staramy się maksymalnie ograniczyć niezbędne formalności. Wszelkie ustalenia, związane z wyceną i umówieniem się na odbiór przeważnie załatwiamy przez telefon 500-600-082 lub mailem. Nie będziesz u nas czekał kilku dni na lawetę, w większości przypadków jest to możliwe w następnym dniu. Taka sama jest sytuacja z rozliczeniem i pozostałymi formalnościami. Nasi pracownicy mają przy sobie pieniądze, które wypłacają klientom, a także przy odbiorze wystawiają wszystkie dokumenty konieczne do wyrejestrowania samochodu i zwrotu części ubezpieczenia. Zapomniałeś hasło? NIP: 891 138 66 17 Numer konta bankowego: PKO 89 1020 5200 0000 4002 0031 1662 ul. Chemików 13 48, 87-800 Włocławek
    https://www.teafish.cc/home.php?mod=space&uid=2562868
    Nasz sklep motoryzacyjny online oferuje części samochodowe do następujących marek: Alfa Romeo, Audi, BMW, Chevrolet, Citroen, Chrysler, Dacia, Dodge, Honda, Hyundai, Jaguar, Jeep, Kia, Lancia, Land Rover, Lexus, Mazda, Mercedes, Mitsubishi, Nissan, Opel, Peugeot, Porsche, Renault, Saab, Seat, Skoda, Subaru, Suzuki, Toyota, Volkswagen, Volvo. Wszystkie auto części, jakie znajdują się w naszym sklepie, pochodzą od certyfikowanych i sprawdzonych dostawców. Dzięki temu, każdy z Klientów może mieć pewność, że zakupione części odznaczają się wysoką jakością i będą mogły mu służyć przez długi czas. Jeśli jesteś zwolennikiem szybszej jazdy na dwóch kółkach i z pasją pokonujesz kolejne kilometry na swoim motocyklu, na pewno docenisz wyposażenie, które znajdziesz w naszym sklepie motoryzacyjnym. Dostarczamy niezbędne wyposażenie do motocykli oraz wiele praktycznych akcesoriów motocyklowych. Doskonałą inwestycją będą m.in. interkomy motocyklowe, które pozwalają na utrzymanie stałego kontaktu z wybranymi osobami lub na korzystanie z nawigacji podczas jazdy. To wyposażenie motocykla jest świetnym uzupełnieniem standardowego ekwipunku każdego kierowcy jednośladów.

    Reply

Leave a Comment