I have attached the amplitude data for a reversed cyclic loading of a beam-column joint. My question is;
1) In defining the step loading for a reversed cyclic loading; Do i use a direct cyclic or dynamic implicit/explicit step? (or maybe static in reversed directions)
2) What are no. of iterations in the step? For example in the sheet the model is subjected to 3x iterations (left-right) from 0s-0.20s. Is that what the no. iteration means? And should i put no. of iteration = 3 for the whole 280s?
3) Correct me if am wrong, from what i read from the abaqus manual, the max. no of increment is the upper limit of the time period. So for example if the increment is 0.05s and the max time period is 280s. Is the max. no of increment = 280/0.05 = 5600? (0.05 increases 5600 times)
Thank you for your help.
Dear shiekh
one way is to use general static steps
create several steps. each step corresponds to half cycle.
in each step use tabular amplitude with step time as
0 0
1 1
and apply boundar condition equal to yield displacement
next step amplitude is
0 1
1 -1
next
0 -1
1 2
and so on
no. of increments in each step let's say or 100 or more
min inc=1e-5 and max inc=0.2 or less
by this way, each cyle will end at exact of yield displ(dy), -dy,2dy,-2dy,3dy,-3dy, etc.
Best Rgards
Dear Mr. Rafaat,
Thank you for your suggestion. Correct me if i'm wrong, are you suggesting to use different Amplitudes for each of the created Steps? Say for example,
Amplitude 1st
0,0
for Step Cyclic 1
Then another;
Amplitude 2nd
1,1
for Step Cyclic 2
yes
but
each amplitude contains 2 lines
for 1st step
0 0
1 1
for 2nd step
0 1
1 -1
for 3rd
0 -1
1 2
for 4th
0 2
1 -2
etc
Dear Mr. Rafaat,
Can you explain more on your phrase 'Apply boundary condition equal to yield displacement'. How do we know the yield displacement? Please refer to my data attached.
For my boundary condition, i set the bottom column as a hinge connection and a simply supported connection for the beam.
I thank you in advance for helping me.
Also, do i need to create 4 loadings as well to accommodate the 4 steps and 4 amplitudes? And will all the loadings be at the same location?
Please do help. Thank you.
is your model 3d using solid element or 2d-(using plain stress element or using plain starin element)?
Yield lateral displacement is found from experiment.Usualy cyclic protocol is in term of yield lateral displacement.
i will try to send you abaqus file for one concrete beam column joint but this week i am so busy with final examinations
Best regards
Mr Rafaat,
If you have a sample beam-column joint model it would hugely help in my learning in understanding the steps for reverse cyclic loading and the boundary conditions. I do hope you can send the model to me via e-mail - [email protected]
Thank you & i do very much hope you can spare some time to send me the model.
Best wishes.
dear all
i need help!
If you have a reinforced concrete beam- column joint model under cyclic loading by Abaqus please send for me Cae file by email: [email protected]
Thank you all.
Dear all,
if anybody of you have a sample beam-column joint model in abaqus(CAE), can u please send it to this email [email protected]. It would hugely help in my learning in understanding the steps for reverse cyclic loading and the boundary conditions.
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