modelling concrete cracks

[zedzed]

Hi,I'm modelling cracked beam,I need to know the way that cracks are considered ? thanks a lot!

[Romain]

Hi,

I am not sure if i clearly understand your question.

In any case, the tensile capacity of the concrete is defined by the user. Thus, the section properties (including the cracks) are evaluated at each step, based on the applied loads, in order o get the sectional equilibrium.

I'm not sure if this help you...
Cheers,
Romain

[ABZed]

Hi,

I had the same question as zedzed.

So cracked concrete reacts like a concrete with no tensile capacity?
How does the software evaluate the cracks? and what are the effects on the algorithm ?

Thanks for your help
Cheers,
Ayoub

[Romain]

Hi Ayoub,

In SeimoStruct you don't need do define a priori the sectional response. Instead, the response of a given section (strength and stiffness) is directly related with the hysteretic properties of the defined materials that are assign to the section.

For instance, if one fibre of a given concrete section reach its maximum tensile capacity, its strength and stiffness are reduced to zero (assuming that your concrete model has zero post-peak strength), and thus can be interpreted as cracked - The section response is the result of the integration of all the fibre of you section.

Cheers,
Romain

[ABZed]

Hi Romain,

Thanks for your answer, it's helping me a lot.

Cheers,
Ayoub