The influence of a weld-induced axi-symmetric imperfection on the buckling of a medium-length silo under wind loading

Spirally welded steel wind towers: Buckling experiments, analyses, and research needs

“…Apart from Eigenmode-affine imperfections, the most common method for introducing imperfections is by consideration of weld-induced imperfections [18]. These weld-related imperfections can be applied as a single cylindrical ring imperfection (e.g., [63,60,32,64,65]),…”

“…In addition to these free parameters, the shape also depends on the half-wavelength (λ 0 ) of the Eigenmode of the tube, measured in the axial direction. This shape equation has been used by a number of other researchers (e.g., [60,64,32,23]), and is expressed as, analytical studies have begun to assess the use of this imperfection shape when designing tubes for flexure [23,67]. While this work is ongoing, no studies yet have been found validating the efficacy of models with this weld imperfection shape against experimental data.…”

Contributions to member stresses due to overall wind-induced behaviors of thin-walled cylindrical shell

“…Therefore, wind loads and wind-induced behaviors of cylindrical shells have been studied extensively in the past. Wind loading effects on circular cylindrical shells were mainly investigated from two aspects: stability under wind loads, focusing on the buckling mode due to circumferential pressure (Uematsu and Uchiyama, 1985;Greiner and Derler, 1995;Pircher, 2004), and vibration characteristics and growth mechanisms of wind-excited ovalling vibration (e.g. Heki and Hawara, 1965;Johns and Sharma, 1974;Katsura, 1985;Laneville and Mazouzi, 1995).…”