Structural behaviour of prestressed stayed columns with single and double cross-arms using normal and high strength steel

Behaviour of eccentrically loaded prestressed stayed columns with circular hollow sections

“…First, a buckling analysis was carried out on the reported geometries to obtain the eigenmode shapes. These eigenmode shapes were then used as initial imperfections in the Riks post-buckling analysis, with the amplitudes reported in previous studies (Martins et al, 2016; Osofero et al, 2012). The post-buckling deformed shapes were also compared with previous experimental works (Martins et al, 2016; Osofero et al, 2012) and a good agreement was observed.…”

“…These eigenmode shapes were then used as initial imperfections in the Riks post-buckling analysis, with the amplitudes reported in previous studies (Martins et al, 2016; Osofero et al, 2012). The post-buckling deformed shapes were also compared with previous experimental works (Martins et al, 2016; Osofero et al, 2012) and a good agreement was observed. A symmetric post-buckling shape was observed for all PSCs with symmetric buckling modes in the experimental investigation carried out by Martins et al (2016).…”

Stability design of cable‐stayed columns

“…A general design procedure for prestressed stayed columns with a single cross-arm system was proposed in [28]. Finally, [9] and [29] presented the results of an experimental study on 12 and 18 m prestressed stayed columns with single and double cross-arms.…”

“…T. Tankova, L. S. da Silva, J. P. Martins: Stability design of cable-stayed columns buckling force calculated using a linear buckling analysis in the presence of the prestressing force N cr,a . Furthermore, the imperfection factors to be used were calibrated based on experimental investigations in [9] and [29].…”

Optimal prestressing of triple-bay prestressed stayed columns

“…The nonlinear behaviour of prestressed stayed columns has only been studied extensively relatively recently [13,14]. This more recent work has demonstrated that although for each configuration of crossarm length, main column length and stay diameter there exists a so-called 'optimal prestressing force' that maximizes the critical buckling load [10], the behaviour of the columns in the post-buckling range is considerably more complex and affects the ultimate load carrying capacity [15,16,17,18,19]. The work has resulted in recommendations for the actual optimal initial prestress accounting for the post-buckling behaviour and the development of a detailed procedure for the design of such single-bay column systems [20,21].…”