biaxial bending algorithm required

huangyhg

biaxial bending algorithm required
anybody can suggest a site which i can gather information for writing an algorithm for biaxial column design.
both "manual of steel construction" and aci318, "building code requirements for concrete" contain sections on biaxial bending.  in msc, its under section h (i think) call combined loading.  i don't know if they have info for an algorithm but those are the design methodologies i use when encountering this problem.
imagineer