Influence of a cutout on circular steel hollow sections under cyclic loading

Fatigue experiments on circular hollow sections with CFRP reinforced cutouts

“…[1], the failure mode of the present tubes under cyclic bending is highly dependent, above all else, on the diameter of the cutout, though also on the location. For large cutouts the cutout crack failure mode (CCF) dominated, in which the crack occurred at the mid-section of the cutout and subsequently developed circumferentially towards the nominal neutral axis of the cantilevered beam.…”

“…In this light, the authors have conducted a set of experiments on such structures, the result of which is presented in a recently published paper [1]. In the mentioned study, cutouts were made close to the area of maximum tension stress in steel tube specimens.…”

“…1). This element was gripped by the bottom jaw of the MTS machine (item 8) while the top jaw (5) gripped a rigid box shape steel girder (1). A support arm (2) was manufactured for the cantilever tube specimen (6).…”

“…These elements are in some cases exposed to cyclic loading. In a previous study (Ghanbari Ghazijahani et al, 2014) the authors conducted a series of fatigue experiments on perforated CHS members and found that large cutouts resulted in a significant reduction in fatigue life, while small cutouts provided stress relief to the base plate connection and increased life. This study focuses on recovering the fatigue life for larger cutouts by reinforcement with CFRP.…”

Timber filled CFRP jacketed circular steel tubes under axial compression

“…The details of these tests as well as the stress strain curve of the material resulted from the coupon tests, can be found through Refs. [16,17]. Carbon fiber sheets were SikaWrap Hex-230C supplied in roll by Sika Australia Pty.…”