Accumulated Damage

04-Unexpected behaviour/errors
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ddonato
Posts: 6
Joined: 04 Apr 2012, 11:42

Accumulated Damage

Post by ddonato »

Hi there. I am doing a dynamic analysis of a structural model, to compare experimental results with numerical results in SeismoStruct.
The analysis are performed using various levels of intensity.
Therefore, in order to simulate the damage accumulated from previous analyzes,i ran a dynamic analysis with a accelerogram containing all intensity levels, allowing some time interval between each intensity level.
But after completion of the analysis, i found out that the results were similar running the analysis in sequence or running them one at a time. It was supposed to get this result?
How do I take into account the cumulative damage of the first analyzes for the following?

Thanks!
Diogo Freire.
ddonato
Posts: 6
Joined: 04 Apr 2012, 11:42

Re: Accumulated Damage

Post by ddonato »

someone?
huffte
Posts: 1005
Joined: 22 Jul 2011, 10:19
Location: Cookeville, Tennessee, USA
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Re: Accumulated Damage

Post by huffte »

ddonato, it seems that if you are getting significant nonlinear response in the early stages that this should reasonably capture cummulative response.

I'm not sure I completely understand your situation however. I believe you have the same accelerogram scaled to different intensity levels combined into a single accelerogram with zero-acceleration space between the onsets of motion?

It could be that the degree of nonlinearity is small enough that the residual deformations at the end of the lower intensity portions of the record are very close to zero, in which case it would not matter whether the increasing intensity levels were applied by themselves or in succession.

Regards.
Tim Huff
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