How can I specify Acceptance strains of concrete and steel materials for Immediate Occupancy (IO),Life Safety (LS) and Collapse Prevention (CP) levels in Nonlinear Analysis?
You can check the acceptance of your members rather material because your section is a combination of composite materials (concrete and steel ) and curvature diagram will explain you the section behavior and external end rotations can be calculated subsequently ,similarly the acceptance criteria can be checked as specified by ASCE and the material strains are related to the end rotations by integrating the area over the length of the member so in short you caliberate your material or member behavior and specify the strains accordingly .Moreover the limit states define the physical meaning of the number in the numerical analysis .You can follow ASCE or FEMA .
Cheers
Hasan,
I have checked for member by using ASCE 41. Howerver, I would like to use fiber hinge model, so I need acceptance strain for separate materials.
Regards
you can check the acceptance criteria of material from the chapter no 6 of ASCE 41-06 which specifies the limit state of concrete and steel based on the loading conditions and intended behavior
Moreover fiber section will give you the strains and from drift to strain relation you can convert them back to match with the acceptable criteria as mentioned in the various codes
Regards
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