Formex Formulation of Transmission Tower Structures

摘要

The formex formulation of the topological configuration, geometry, load andsupport conditions of self-supporting or free-standing transmission towers is presented. In the formulation, a natural normat coordinate system is used. The tower topology is formulated according to member types and orientations within the tower. The formex formulation is implemented as a pre-processor for a general elasto-plastic nonlinear large displacement analysis program for transmission tower structures. The data generated from the formex formulation is transformed into an AutoLISP file that can be loaded and used by AutoCAD. Throughout the paper, it is assumed that the readers are familiar with the basic concept and terminology used in formex algebra.