Backbone Curve Graph

03-Analytical/modelling capabilities
Kirkaguel
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Joined: 31 Dec 2018, 10:04

Re: Backbone Curve Graph

Post by Kirkaguel » 04 Nov 2019, 15:21

seismosoft wrote:
22 Mar 2019, 17:07
Unfortunately, no.
In fiber modelling this is automatically taken care by the constitutive material models for concrete and steel.
There is no need for the user to calibrate it.

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Just a follow up question, does the constitutive material models capture degradation in the hysteresis plot even if the the steel material is using elastic perfectly plastic hysteresis model which is the common assumption for steel bars?

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seismosoft
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Joined: 06 Jul 2007, 04:55

Re: Backbone Curve Graph

Post by seismosoft » 04 Nov 2019, 21:52

Yes, for different reasons, including the stress-strain curve of concrete, the geometric nonlinearities, but also the stress strain curve of steel (in SeismoStruct there is the stl_mn steel material model that is capable of modelling the buckling of rebars under compression.
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Kirkaguel
Posts: 30
Joined: 31 Dec 2018, 10:04

Re: Backbone Curve Graph

Post by Kirkaguel » 05 Nov 2019, 03:35

Thank you for the clarification, another question does the output generated capture the progression of response of concrete starting from cracking to crushing and similarly for steel not just buckling but also fracture?

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seismosoft
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Re: Backbone Curve Graph

Post by seismosoft » 05 Nov 2019, 17:03

Yes, this can be done with the introduction of performance criteria, or code-based checks in the corresponding tabs in the pre-processor
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