Pushover curve

01-Installation of new versions
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roshen.rj
Posts: 20
Joined: 10 Feb 2020, 07:57

Pushover curve

Post by roshen.rj »

Hello

I am modelling a 4 storey jacket with high strength concrete jacket. However, although the structure is designed well in ETABS, the pushover curves still gives me weird pushover curves, as some of its branches shows a slight descend and then ascend.

I am suspecting some kind of bug in the model.

Image
roshen.rj
Posts: 20
Joined: 10 Feb 2020, 07:57

Re: Pushover curve

Post by roshen.rj »

roshen.rj wrote: 07 Oct 2020, 12:16 Hello

I am modelling a 4 storey jacket with high strength concrete jacket. However, although the structure is designed well in ETABS, the pushover curves still gives me weird pushover curves, as some of its branches shows a slight descend and then ascend.

I am suspecting some kind of bug in the model.

Image
https://ibb.co/KL8K6jJ

Please refer to this link for curve
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seismosoft
Posts: 860
Joined: 06 Jul 2007, 04:55

Re: Pushover curve

Post by seismosoft »

Such small kinks in the curve are not somethin unseen in pushover analysis, and occur due to redisitrbution of forces upon the failure of one or more members. Yuo might want to employ a bit more stringent convergence criteria, e..g decrease the displacement and rotation tolerances 10 times (e.g. from 1e-4 to 1e-5).
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roshen.rj
Posts: 20
Joined: 10 Feb 2020, 07:57

Re: Pushover curve

Post by roshen.rj »

I tried this but it didn't work
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seismosoft
Posts: 860
Joined: 06 Jul 2007, 04:55

Re: Pushover curve

Post by seismosoft »

What exactly you want to achieve? The capacity curve does not look strange.
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