How to convert stress into moments in slabs?
How to convert stress into moments in slabs?
(OP)
I want to modelate solid slab of concrete, and the program give me streess (kg/cm2), and I want to design it with moments (kg-cm). how to realize that convertion?





RE: How to convert stress into moments in slabs?
RE: How to convert stress into moments in slabs?
The stress (kg/cm2) I want to convert to moment (kg/m), manually. (in flexural design).
RE: How to convert stress into moments in slabs?
S=(M*c)/I
S = Stress
M = Moment
c = distance from the outer fiber to the center of the member
I = inertia of the section
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Diquan
diquan@yahoo.com
RE: How to convert stress into moments in slabs?
I=b*h^3/12
"b" is 100cm or if you use inches "b" equal to 12in (1feet)
so, when calculating the amount of steel is going to give you "cm^2" for every "cm" - (cm^2/cm or in^2/in)
=======================================
Diquan
diquan@yahoo.com
RE: How to convert stress into moments in slabs?
in the case of slab it is not so simple, because we have many type of stress
S11=F11/th-(12*M11/thb^3)*x3.
S22=F22/th-(12*M22/thb^3)*x3.
S12=F12/th-(12*M12/thb^3)*x3 etc...
x3 represente the variation of thickness of slab.
to obtain M11,M22 etc...
we must integrate the stress s11,s22,s12 along the thickness of the slab.
see "Internal Force and Stress Output Page 144 in the sap reference manual "
The Shell element internal forces (also called stress resultants) are the forces and moments that result from in tegrating the stresses over the ele ment thick ness. These
internal forces are etc...
RE: How to convert stress into moments in slabs?
- x3 represente the variation of thickness of slab from midplan of slab to the point where the stress is calculated .
RE: How to convert stress into moments in slabs?