FRAME3D is a program for the three-dimensional nonlinear analysis of steel buildings. It aims to overcome the computational challenges posed by full 3D analysis of buildings subject to earthquake ground motion. The element library consists of a plastic hinge beam element, an elastofiber beam element, a modified elastofiber element, a panel zone element, a 4-noded diaphragm element to model floor slabs, and an elastic translational/rotational spring element to model foundations and supports. The program utilizes a Netwon-Raphson iteration strategy applied to an implicit Newmark time-integration scheme to solve the nonlinear equations of motion at each time-step. Geometric nonlinearity and shear deformation are included in the formulation.

P-FRAME3D is the parallel version of FRAME3D currently under development.  Upon completion, P-FRAME3D can be executed on a parallel computer cluster to solve complex structural engineering problems such as the strong shaking of a super-highrise building or a long-span cable-supported bridge under a large earthquake occurring on a nearby fault.

Related Links:

FRAME3D Program - http://www.frame3d.caltech.edu.

The Caltech Virtual Shaker - http://virtualshaker.caltech.edu

FRAME3D Program User Guide - FRAME3D - A Program for Three-Dimensional Nonlinear Time-History Analysis of Steel Buildings: User Guide.

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