Slab Stiffness (AS3600)
Slab Stiffness (AS3600)
(OP)
Thank you in advance for giving your time to address my question.
I am modeling a flat plate in ETABS and I am trying to figure out what stiffness modifier should I use. I know ACI gives this value to be 0.7 for Column, 0.35 for Beam, and 0.25 for Slabs. I am designing the structure for Australian code and I can't find recommendations for stiffness factor to account for cracking.
Cheers!
I am modeling a flat plate in ETABS and I am trying to figure out what stiffness modifier should I use. I know ACI gives this value to be 0.7 for Column, 0.35 for Beam, and 0.25 for Slabs. I am designing the structure for Australian code and I can't find recommendations for stiffness factor to account for cracking.
Cheers!






RE: Slab Stiffness (AS3600)
I know SAFE would have an option to do a non linear analysis where cracking was explicitly calculated (been a few years since I used it), maybe Etabs has something similar in the new slab analysis added in version 16?
RE: Slab Stiffness (AS3600)
6.3.2 Analysis
An elastic analysis incorporating secondary bending moments shall comply with the
requirements of Clause 6.2 and the following:
(a) The effect of lateral joint displacements shall be taken into account.
(b) For strength design of a regular rectangular framed structure, the cross-sectional
stiffness of the flexural members and columns may be taken as 0.4EcIf and 0.8EcIc
respectively
RE: Slab Stiffness (AS3600)
RE: Slab Stiffness (AS3600)
Post-cracking shear modulus of reinforced concrete membrane elements.
khaldoun Rahal