Some modeling aspects in the nonlinear finite element analysis of cable supported bridges

This paper presents a method for modeling cable supported bridges for nonlinear finite element analysis. A two-node catenary cable element, derived using exact analytical expressions for the elastic catenary, is proposed for the modeling of cables. The cable element tangent stiffness matrix and internal force vector are evaluated accurately and efficiently using an iterative procedure. The reliability and efficiency of the formulations used are demonstrated by studying the behavior of the Great Belt suspension bridge during girder erection and the behavior of a cable-stayed bridge. Eigenfrequency analyses are also conducted and the results show good agreement when compared with previously published data. (C) 1999 Elsevier Science Ltd. All rights reserved.