@article { author = {Farshad, M. and Karami, Ghodratollah}, title = {Earthquake Analysis of Spatial Rod Systems}, journal = {International Journal of Engineering}, volume = {3}, number = {3}, pages = {134-147}, year = {1990}, publisher = {Materials and Energy Research Center}, issn = {1025-2495}, eissn = {1735-9244}, doi = {}, abstract = {A master element to be employed as a general spatial rod finite element is presented. This spatially curved and pretwisted element can have variable cross-section and variable curvature change. It may also be resting on an elastic foundation. Also, a finite element formulation for a general earthquake analysis of spatial rods is presented. The theoretical foundation has lead to a general-purpose computer program which could conveniently be utilized in the dynamic and/or earthquake analysis of spatially curved and pretwisted skeletal systems. Employing this theoretical-numerical scheme, several examples of skeletal structures subjected to ground excitations are analyzed.}, keywords = {}, url = {https://www.ije.ir/article_71032.html}, eprint = {} }