reduced section property

[cxs]

Is it necessary to explicitly apply section multiplier to calculate reduced shear area and moment of inertia in opensees, to account for cracked section properties, like it's done in SAP 2000?

[fmk]

yes, but to model shear deformation you must use a section aggregator, see the command and code example:

http://opensees.berkeley.edu/wiki/index ... Aggregator