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Title |
Improved Transmission of UHSC Column Loads by Puddling of Fiber Reinforced UHSC
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Keywords |
초고강도 콘크리트 ; 슬래브-기둥 접합부 ; 축하중 ; 강섬유 |
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Abstract |
This study reports on the structural characteristics of slab-column connections using fiber-reinforced ultra-highstrength concrete (UHSC). Compression tests were performed on two slab-column and four isolated column specimens. In the column load tests, slab loads were also applied on the slab-column specimens so that the actual confinement condition at the slabcolumn joint was considered. The main parameter investigated was the “puddling” of fiber-reinforced UHSC. This paper also investigates the effects of some parameters, such as confinement of slab concrete, steel fibers, and concrete strength of the joint, related to the ability of the slab-column specimens and isolated column specimens without the surrounding slab to transmit axial loads from the UHSC columns through slab columnconnections. Furthermore, the ACI Code (2005) and the CSA Standard (2004) are compared to the experimental results. The beneficial effects of the puddling of fiber-reinforced UHSC on the transmission of column loads through slab-column connections are demonstrated.
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