Stability of Multiple-crossarm Prestressed Stayed Columns With Additional Stay Systems. (November 2017)

• Record Type: Journal Article
• Authors: Lapira, Luke; Wadee, M. Ahmer; Gardner, Leroy
• Is Part Of: Structures. Volume 12(2017)
• Page Start: 227
• Page End: 241
• Publication Date: 2017-11
• Subjects: Prestressed stayed columns -- Steel structures -- Analytical modelling -- Structural stability -- Finite element analysis -- Nonlinearity -- Cables; Structural engineering -- Periodicals; 624.1
• DOI: 10.1016/j.istruc.2017.09.010
• Languages: English
• ISSNs: 2352-0124

Abstract

Abstract: Prestressed stayed columns have an enhanced resistance to buckling through the effective use of crossarms and pretensioned stays when compared to conventional columns. An analytical derivation of the minimum, linear optimum and maximum initial pretension forces for configurations of prestressed stayed columns with multiple crossarms and additional stays is presented for the first time. The findings are validated through comparisons with finite element models developed in the commercial package ABAQUS. The influence of the initial pretension on the load-carrying capacity of the configurations considered is also analysed, providing insight into the actual optimum initial pretension force for the configurations accounting for the significance of geometric nonlinearities.