Search found 160 matches

by Prafullamalla
Sat May 30, 2020 7:28 am
Forum: OpenSeesPy
Topic: Example of RC column with mixed beam element using OpenSeePy
Replies: 4
Views: 4649

Re: Example of RC column with mixed beam element using OpenSeePy

Looks, there will be problem on sharing files in this platform as python is indent based program
by Prafullamalla
Sat May 30, 2020 3:43 am
Forum: OpenSeesPy
Topic: Example of RC column with mixed beam element using OpenSeePy
Replies: 4
Views: 4649

Example of RC column with mixed beam element using OpenSeePy

""" Created on Thu May 28 16:27:29 2020 @author: praf_malla@hotmail.com, Nepal @ Corona time, Lockdown :D :D """ # ============================================================================= # ANALYSIS OF RC COLUMN # ============================================================================= # U...
by Prafullamalla
Sun Mar 22, 2020 7:43 pm
Forum: OpenSees.exe Users
Topic: NEW WORKING WITH OPENSEES
Replies: 1
Views: 884

Re: NEW WORKING WITH OPENSEES

there are lot of working examples. you can either google it or search on different topic in this forum
by Prafullamalla
Wed Mar 18, 2020 8:48 am
Forum: OpenSees.exe Users
Topic: LAYERED SHELL ELEMENT
Replies: 2
Views: 3031

Re: LAYERED SHELL ELEMENT

the concrete material for layered shell element has problem specially after yield load. I faced the problem when I was working shear wall model with shell elemnt
by Prafullamalla
Wed Mar 18, 2020 8:40 am
Forum: OpenSees.exe Users
Topic: The model was fail by convergence
Replies: 2
Views: 1014

Re: The model was fail by convergence

modify and add this part according to your code set controlnode $IDctrlNode set loaddirection $IDctrlDOF set currentDisp 0.0 # cyclic analysis objects # Set up analysis parameters constraints Transformation ; numberer RCM ; system BandGeneral ; test EnergyIncr 1.e-6 25 0 ; algorithm Newton ; ; # det...
by Prafullamalla
Sat Mar 14, 2020 2:28 am
Forum: OpenSees.exe Users
Topic: Ground motion scaling factor in minor direction
Replies: 1
Views: 2137

Ground motion scaling factor in minor direction

I want to perform bi-direction dynamic analysis but I do not know how to calculate the scale factor of ground motion in minor direction. Suppose I want to use ELcentro earthquake gound motion in X major direction and Y minor direction. The maximum value of ground motion is 0.25g in X-diection and 0....
by Prafullamalla
Tue Mar 10, 2020 10:52 pm
Forum: OpenSees.exe Users
Topic: High Frequency noise in dynamic analysis
Replies: 0
Views: 1254

High Frequency noise in dynamic analysis

For a couple of months, I was working on dynamic analysis of shear wall building with bolted connection. Now, I find high frequency noise in the model. The model result is in good agreement with the shake table if I take damping ratio as high as 40%. Is it possible to remove high frequency noise in ...
by Prafullamalla
Sat Mar 07, 2020 3:53 am
Forum: OpenSees.exe Users
Topic: High frequency noise
Replies: 9
Views: 7091

Re: High frequency noise

Have you solved the problem. I am also facing same problem in my model high frequency noise
by Prafullamalla
Sat Feb 15, 2020 11:40 pm
Forum: OpenSees.exe Users
Topic: Wall Element using the Equivalent Frame Method
Replies: 2
Views: 988

Re: Wall Element using the Equivalent Frame Method

Recently, I was using column as a shear wall. Addition of shear greatly affects the time period. I have added the shear section and the time period changes from 0.0006 sec to 0.0031 sec. #units mm, MPa, sec, N wipe; # file mkdir Output; # model basic -ndm 2 -ndf 3; node 1 0 0; node 2 0 375; node 3 0...
by Prafullamalla
Mon Jan 20, 2020 12:49 am
Forum: OpenSees.exe Users
Topic: No of cycles in displacement graph higher in dynamic analysis then the experiment
Replies: 2
Views: 683

Re: No of cycles in displacement graph higher in dynamic analysis then the experiment

Because of Damping, now my curve matches with the experimental result but still I could not understand, why the experimental result is not similar to the model result. Check the fig. i.e., exp curve is smooth but my model has ups and down curve matching the fundamental frequency of building Fig is i...
by Prafullamalla
Sat Jan 18, 2020 11:25 pm
Forum: OpenSees.exe Users
Topic: No of cycles in displacement graph higher in dynamic analysis then the experiment
Replies: 2
Views: 683

Re: No of cycles in displacement graph higher in dynamic analysis then the experiment

Ok, the damping coefficient affects it. with increaing alpha for initial mode i.e., mass proportional, no . of frequency for displacement can be decreased but now, the amplitude is increasing
by Prafullamalla
Sat Jan 18, 2020 5:28 am
Forum: OpenSees.exe Users
Topic: No of cycles in displacement graph higher in dynamic analysis then the experiment
Replies: 2
Views: 683

No of cycles in displacement graph higher in dynamic analysis then the experiment

I am doing a dynamic analysis of building with bolted connection and comparing a result with the shake table test. The frequency of model matches with the experiment result and is 4Hz. but in the acceleration and displacement graph of model , no of cycles of acceleration and displacement equals to t...
by Prafullamalla
Tue Dec 10, 2019 6:56 pm
Forum: OpenSees.exe Users
Topic: Gravity and Dynamic problems
Replies: 2
Views: 1124

Re: Gravity and Dynamic problems

Some of your node might be free
by Prafullamalla
Wed Dec 04, 2019 11:40 pm
Forum: OpenSees.exe Users
Topic: Output acceleration is greater than the input acceleration
Replies: 1
Views: 570

Re: Output acceleration is greater than the input acceleration

The problem is due to non-convergence in the intermediate steps. When there is non-convergence in intermediate steps, it calculates unusual too Big value. Then in the next step, it again uses this unusual big value
by Prafullamalla
Wed Dec 04, 2019 12:38 am
Forum: OpenSees.exe Users
Topic: Output acceleration is greater than the input acceleration
Replies: 1
Views: 570

Output acceleration is greater than the input acceleration

The output accelearation is same as input for about 0.1g, but when I increase the input accel to 0.3g then the ouput accel becomes about 6g. What might be the reason for the increase in output acceleration at the node.