CSI ETABS - 21 Time History Analysis (scale factor discussed) | Part 1

[@civilmdc]

To make a RELATIONSHIP, Don't forget to press the subscribe button with bell icon to get the latest notifications. My channel :) kzbin.info/door/w9kSuR1bTFBmaMEyD_DXvQ

[@SDO4183]

Does Pakistan earthquake records are present at peer website or not?

[@akif7734]

Hi again, :) I have one more question about 11:15. You have earthquake records on x.y directions. You did define x direction record and y direction record. Its okay. To this point I understood. (btw i am a student) Why you did match response spectrum with earthquake record? What does this mean? This Why you didn't use only earthquake record directly? 1- If I create response spectra using different soil types 2- Then if I match each spectrum separately with this earthquake record As a result, can I find out how the same structure reacts to the earthquake in different types of soils? Thanks already for answers.

[@civilmdc]

Yes, I did matching,.... It is called scalling of Earthquake... Two methods... 1)scaled maching 2)Spectrum matching I used here, Spectrum matching.... Why I used.... Because, any earthquake have its own properties like, it's magnitude, soil properties, intensity etc.... To match any earthquake to your required site, where you want to construct the building, it may be low risk area, So that is why, I matched.. Yes, after scalling under different soil conditions it will behave different...... I think so...

[@civilmdc]

2ndly, you can apply earthquake directly to your building without matching... But then you have to mention.... You have used uncalled earthquake.

[@muhammadqasim2342]

Very helpful Lecture Thanks Sir

[@BashirAhmed-jo4zq]

Learning alot from yuor videos Thanks Buddy

[@Mohsinbagban]

The time history records which you obtained, are they in mm/s2 or m/s2 or g? Also, the unit of Scale factor g in etabs is 9806.65 if you select units in m/s2. While doing the Target Response Spectrum thing, you kept the Time History data unit as "g Units".

[@ciciinfant2121]

What is the program default time history record inbuilt in ETABS Sir?

[@civilmdc]

There are many.... You can see in the installation directory

[@akif7734]

Hi, firstly thanks for this videos. I have one questions about 21.20, why you didn't change ''Load Name'' as U2. I think ''TH- Y imperial'' on the y direction. You did forget or something. If you can explain i have so happy. Thank you

[@civilmdc]

Welcome Yes. You are right.... It should be u2.

[@shubhamkabra8956]

Please give the link to download the ASCE7-2016 pdf

[@civilmdc]

Please visit www.civilmdc.com and search the code ASCE 7 16 You will easily get... If you still face any issue please let me know.

[@NadaMohamed-zz5xo]

@@civilmdc Thank you sir for your effort in this video ,Can I ask about time step when you took it in the time history function you entered it as .01 sec and finally you entered it .1 sec in load case (output time step size)?? can you explain this please?

[@ch_doodles]

Hello, is Ig/R also used in NLTHA in etabs fin load case or in RSA only? I think I read somewhere under csi that the scale factor for the load case in time history depends on the unit of the record? like if its g units, its scale factor is 9.81 if your model is in meters.. kindly correct me if Im wrong..

[@ch_doodles]

*for load case or in RSA load case scale factor only?

[@SDO4183]

@enginnering world Does Earthquake records of Pakistan are also present at peer website or not.?

[@civilmdc]

Dear, I don't know exactly You have to download the database file... And search Pakistan word.... You will get the idea

[@sreelakshmiunnikrishnan7136]

Sir ,wat can we do if the time history is not matching to response spectrum?...please reply

[@civilmdc]

Choose another earthquake record... 2nd choose time domain or frequency domain... Then see the results

[@sreelakshmiunnikrishnan7136]

@@civilmdc i had used is 1893:2016 code...and imperial valley earthquake record....

[@civilmdc]

@@sreelakshmiunnikrishnan7136 dear... You can choose other earthquake record s... For example Northridge, Kobe , Taiwan etc... Which match well... Use that one

[@sreelakshmiunnikrishnan7136]

@@civilmdc sir,wat may be the reason for this mismatch... pls reply ,as this is for my final yr prjct

[@civilmdc]

@@sreelakshmiunnikrishnan7136 Reason, This is not suitable for building... ( Time period, soil conditions etc.

[@muhammadawaismalik-x4m]

We have done Time history analysis but base shear and acceleration results are not comming for steel plate shear wall

[@r.j.s.quebrar386]

hi sir, how did you know the time length of the ground motion?

[@civilmdc]

When you define time history graph... At that point

[@r.j.s.quebrar386]

@@civilmdc thank you sir for your reply, actually, i take the time history records at PEER website. I want to confirm if it is the 5-95% duration? or the 5-75% duration? to be used?

[@suliman9058]

dear hussain toy referring to asce clause of non liner TH ,so is this liner or non liner th thank you

[@samihattab3087]

Thank you for your effort .But I have a question It's mentioned that matching Time history record to response spectrum is for Non-linear Time history analysis . Meanwhile , when you define the load case of time history , you made linear time history. is it correct? in case of linear time history i guess it is needed to divide by R only !

[@ciciinfant2121]

How to apply 3 time histories and 7 time history in etabs for non.linear condition as per asce

[@civilmdc]

Same way... Define 7 time history load cases and apply to the structure

[@ciciinfant2121]

Ok Sir, but what is that for 3 time histories, take the maximum value and 7 take average value.What is that value indicate?what to do with that value in both the cases

[@hebaaloran7980]

@@ciciinfant2121 Hello, May I ask if you got an answer to your question? What did you do in the case of 7 records? And thank you in advance

[@kazuyazen7119]

Why my function graph is not same as you, i tried many way and its just not like your function graph, help me please

[@civilmdc]

Upload same file... Then it will be... Same station. Recorded file

[@kazuyazen7119]

@@civilmdc i download el centro, but my function graph just a line not up and down like you (5:12)

[@Springseason632]

Sir if possible please make video on SAP 2000 16 too. We will be grateful to you Sir please.

[@rohangraikar5382]

Sir please send El Centro EQ data

[@civilmdc]

Dear Watch this video ... you will easily get data of any earthquake record Download Earthquake records from PEER Ground Motion Database (ngawest2 berkeley) Video link: kzbin.info/www/bejne/qZDOi2CEZt6dmpI

[@farhaankhan5868]

Thank you brothee

[@anand4236]

We lost the interest in this video at where you analysed in linear model instead of FNA

[@anasjh4239]

Thank you for the video. I have a question and I really need an answer for it. I am performing NNTHA and in the scale factor, I used your formula but I need a reference to it. Could you share where you got this formula from?

[@civilmdc]

Kindly specify the formula

[@anasjh4239]

@@civilmdc I * g / R

[@civilmdc]

@@anasjh4239 it is basic formula ... For base shear calculations

[@anasjh4239]

So when I go to the load case in Etabs for time history case. There is an option for scale factor. Should I put I*g / R ?

[@civilmdc]

@@anasjh4239 yes