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Positive and Negative Flexural Stiffness

Positive and Negative Flexural Stiffness

Positive and Negative Flexural Stiffness

(OP)
Hello,

I am using SAP2000 to create a grillage model for a multi-span bridge.  The girders act as a composite section with the deck and, as a result, will have a different effective stiffness for positive and negative bending after cracking.  Is it possible to incorporate this change in stiffness in the program (in other words, can I input specific section properties for positive and negative bending)?

Thank you in advance.

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