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strains as a performance indicator

Posted: 15 Apr 2016, 13:14
by zthaer
Dear all;
I'm investigating the response of multi-degree of freedom building under artificial ground motion records through the nonlinear dynamic analysis of inelastic beam-column fiber element model. in past couple years i used to do some stuff in seismostruct v5 where the section materials are : unconfined, confined concrete and steel but we couldn't able to track the performance through the materials strains/capacity. in the most recent seismostruct software (i.e. v7.06) which i used these days i saw that it becomes two types of materials by which the confinement is calculated in other integrated section in the same dialog.
my question is: when i track the performance through materials strains i saw that the program tells that some elements reached the bar fracture (for example) in an elements, so i can tell that i is the longitudinal bar of that elements
but when the strain of concrete elements reached 0,01 i couldn't understand is that for the core materials ( the confinement part of that section) or not. maybe another question is of significant that i need to modified the stirrups materials strength in this way by modifying every single elements which seems to me very challenging.

best;
Thaer;

Re: strains as a performance indicator

Posted: 20 Apr 2016, 15:21
by seismosoft
Hi Thaer,

Indeed, in SeismoStruct v7 the concrete strain is checked for the entire section, i.e. confined + unconfined, and it is not possible to check the concrete core only. This behaviour has been corrected in SeismoStruct 2016, which will be published probably in May.
Unfortunately, we cannot understand what you mean with "i need to modified the stirrups materials strength in this way by modifying every single elements which seems to me very challenging".

Regards,
Seismosoft Support