“…stress, strain) for the case without fibers, X f is parameter after addition of fibers and a is a constant which depends on the studied parameter. [8], and Redaelli et al [9]. As an alternative to conventional steel reinforcement, researchers have also studied the potential of using cast-in-place FRP and steel tubes to enhance the axial performance of UHPFRC columns [10,11].…”
Section: Previous Research On Compressive Behavior Of Uhpfrcmentioning
“…stress, strain) for the case without fibers, X f is parameter after addition of fibers and a is a constant which depends on the studied parameter. [8], and Redaelli et al [9]. As an alternative to conventional steel reinforcement, researchers have also studied the potential of using cast-in-place FRP and steel tubes to enhance the axial performance of UHPFRC columns [10,11].…”
Section: Previous Research On Compressive Behavior Of Uhpfrcmentioning
“…UHPFRC with compressive strength 200 MPa was applied for columns of building where extreme high compressive load was applied [6]. Experimental investigation of real size columns with length of 3000 mm made of UHPC was performed [3]. Three different type of column´s reinforcement were used.…”
Section: Some Experience With Uhpc In Load-bearing Columnsmentioning
Main advantage of composite concrete columns, in comparison with traditional reinforced concrete columns, is its increased load-bearing capacity by using of solid steel reinforcing core. Ordinary type of such a steel-concrete (S-C) composite column consists of normal concrete and different type of solid steel core. In last decades high quality concrete is more and more used for load-bearing structural members exposed compression like columns. Present knowledge level in the area of ultra-high quality of concrete open a new chance for utilization of this progressive structural material in concrete building industry. This paper presents some new information and laboratory test results of concrete-concrete (C-C) composite columns by utilizing of UHPFRC.
“…Table 1 summarizes some of the previous studies which have investigated the axial performance of UHPC columns. Several researchers have examined the behavior of slender UHPC columns, including: Aarup et al (2005), Redaelli et al (2014) and others. Research on the behavior of short UHPC columns is limited.…”
This paper summarizes the results of a study examining the axial load performance of UHPC columns. As part of the study a total of four large-scale columns having square crosssection are tested under pure axial loading. Parameters considered in this study include the effect of transverse reinforcement spacing and arrangement. The results show that the use of welldetailed transverse reinforcement allows for excellent ductility in UHPC columns, with performance affected by the spacing and configuration of the transverse steel detailing. Reducing the spacing of the ties is found to improve confinement resulting in an enhancement of post-peak column ductility. Performance further improves as the amount of transverse steel within the column cross-section is increased. The results also show that the addition of fibers in UHPC columns allows for gradual cover spalling and controlled failure of core concrete.
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