Experimental investigation on the cyclic behaviors of ultra-high-performance steel fiber reinforced concrete filled thin-walled steel tubular columns. (July 2019)

• Record Type: Journal Article
• Authors: Xu, Shenchun; Wu, Chengqing; Liu, Zhongxian; Shao, Ruizhe
• Is Part Of: Thin-walled structures. Volume 140(2019)
• Page Start: 1
• Page End: 20
• Publication Date: 2019-07
• Subjects: Ultra-high-performance concrete filled thin-walled steel tubular columns -- Cyclic behavior -- Experimental investigations -- High strength concrete -- Effects of main variables; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2019.03.008
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: This paper presents an experimental investigation on the cyclic behaviors of ultra-high performance steel fiber reinforced concrete filled thin-walled steel tubular columns under combined axial compression and cyclic lateral displacement loading. The failure modes, hysteretic behaviors, envelop diagrams, ductile performance, stiffness degradation and energy dissipation capacity were analyzed in detail. Notably, the cyclic behaviors of referenced high strength concrete and normal strength concrete filled thin-walled steel tubular columns were also studied to get a better illustration of the cyclic behaviors of ultra-high-performance steel fiber reinforced concrete filled thin-walled steel tubular columns. Furthermore, the effects of steel tube thickness, axial compression ratio, volume ratio of steel fiber and slenderness on the cyclic behaviors of ultra-high-performance steel fiber reinforced concrete filled thin-walled steel tubular columns were also investigated in detail. The test results indicate that the high strength concrete filled thin-walled steel tubular columns represent a poor cyclic behavior. However, replacing high strength concrete with ultra-high performance steel fiber reinforced concrete to infill thin-walled steel tubes can get an excellent cyclic behavior. Moreover, the cyclic behavior of ultra-high performance steel fiber reinforced concrete filled thin-walled steel tubular columns is also much better than that of normal strength concrete filled thin-walled steel tubular columns. Highlights: An experimental investigation on the cyclic behaviors of UHPSFRC filled thin-walled steel tubular columns was conducted. The failure modes, hysteretic behavior, envelop loops, ductility, stiffness and the energy dissipation were presented. The effect of steel ratio, axial compression ratio, volume ratio of steel fiber and slenderness were analyzed and discussed.