Geometrical nonlinearities on the static analysis of highly flexible steel cabl...

• Author(s): Freire, A. M. S. ; Negrão, J. H. O. ; Lopes, A. V.
• Date: 2006
• Persistent ID: http://hdl.handle.net/10316/3967
• Origin: Estudo Geral - Universidade de Coimbra
• Subject(s): Cable-stayed bridges; Nonlinear analysis; Large displacements; Beam-column; Cable sagging
• Document Type: Article
• Language: English

Description

An evaluation of the importance of geometrically nonlinear effects on the structural static analysis of steel cable-stayed bridges is presented. A finite element model is analyzed using linear, pseudo-linear and nonlinear methods. The pseudo-linear approach is based on the modified elastic modulus. The nonlinear analysis involves cable sag, large displacement and beam-column effects. The results confirm that both cable sag and large displacement originate the most important nonlinear effects in those structures. Beam-column effects are irrelevant for service loads. Both the pseudo-linear approach and the modified modulus element prove to be very limited or even inappropriate. http://www.sciencedirect.com/science/article/B6V28-4M6SB97-4/1/de283428716dc4f80f22fb729e9b188d