The Section Designer automatically generates concrete stress-strain curves. By default, these curves do not provide tensile strength. Stress-strain curves may be reviewed within the Section Designer by using the concrete-model View controls.
To model the tensile strength of concrete, a material stress-strain curve may be converted into a user-defined constitutive model by selecting Define > Materials. A separate material must be created for each Mander confinement state. Then the Section Designer will apply this user-defined curve. For parametric Mander material, an option which is not user-defined, stress-strain curves are automatically computed, though tensile strength is not recognized.
How can I adjust the shear stress-strain curve?
Extended Question: I have defined the nonlinear constitutive relationships for an isotropic concrete material. How do I set a specific maximum shear-stress capacity?
Answer: For response, please refer to the
CSI
Analysis Reference Manual (Nonlinear Material Behavior > Shear, page 82). Further, a [layered shell] object may be created in which individual layers represent pure shear and pure axial behaviors. Different material properties may be assigned to each layer and its local mechanical behavior.
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