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

Krishnan, S., 2009.  "FRAME3D V2.0 - A Program for the Three-Dimensional Nonlinear Time-History Analysis of Steel Buildings: User Guide", Technical Report - CaltechEERL:EERL-2009-04, California Institute of Technology, Pasadena, California, 2009.  [PDF]

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

Krishnan, S., 2003.  "Three-Dimensional Nonlinear Analysis of Tall Irregular Steel Buildings Subject to Strong Ground Motion", Technical Report - CaltechEERL:EERL-2003-01, California Institute of Technology, Pasadena, California, 2003.          [PDF]

Krishnan, S. and Hall, J. F., 2006.  "Modeling Steel Frame Buildings in Three Dimensions - Part I: Panel Zone and Plastic Hinge Beam Elements", Journal of Engineering Mechanics, vol. 132(4), pp. 345-358, April 2006. [PDF]

Krishnan, S. and Hall, J. F., 2006.  "Modeling Steel Frame Buildings in Three Dimensions - Part II: Elastofiber Beam Element and Examples", Journal of Engineering Mechanics, vol. 132(4), pp. 359-374, April 2006. [PDF]

Krishnan, S., 2009.  "On the Modeling of Elastic and Inelastic, Critical- And Post-Buckling Behavior of Slender Columns and Bracing Members", Technical Report - CaltechEERL:EERL-2009-03, California Institute of Technology, Pasadena, California, 2009. [PDF]

Krishnan, S..  "The Modified Elastofiber Element for Steel Slender Column and Brace Modeling", Journal of Structural Engineering, vol. 136(11), pp. 1350-1366, November 2010. [PDF]

Krishnan, S., 2010.  "Case Study of the Collapse of a Water Tank", Technical Report - CaltechEERL:EERL-2010-01, California Institute of Technology, Pasadena, California, 2010. [PDF]