The user guide to program FRAME3D is available online.  Please follow the following link:

FRAME3D - A Program for Three-Dimensional Nonlinear Time-History Analysis of Steel Buildings: User Guide, Swaminathan Krishnan (2004), Technical Report - CaltechEERL:EERL-2003-03, California Institute of Technology.

Theoretical details of the structural elements in the program can be found in the following document:

Three-Dimensional Nonlinear Analysis of Tall Irregular Steel Buildings Subject to Strong Ground Motion, Swaminathan Krishnan (2004), Technical Report - CaltechEERL:EERL-2003-01, California Institute of Technology.