Experimental investigation on the cyclic behaviors of ultra-high-performance steel fiber reinforced concrete filled thin-walled steel tubular columns
Experimental investigation on the cyclic behaviors of ultra-high-performance steel fiber reinforced concrete filled thin-walled steel tubular columns
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DOI：
10.1016/j.tws.2019.03.008
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发表时间：
2019-07
影响因子：
6.4
通讯作者：
Shenchun Xu;Chengqing Wu;Zhongxian Liu;Ruizhe Shao
中科院分区：
文献类型：
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作者：
Shenchun Xu;Chengqing Wu;Zhongxian Liu;Ruizhe Shao
本文对超高性能钢纤维混凝土薄壁钢管柱在轴压和循环侧向位移联合荷载作用下的循环性能进行了试验研究。对其破坏模式、滞回特性、包络图、延性、刚度退化和耗能能力进行了详细分析。值得注意的是，还研究了参考高强混凝土和正强混凝土填充薄壁钢管柱的循环性能，以便更好地说明超高性能钢纤维混凝土填充薄壁钢管柱的循环性能。此外，还详细研究了钢管厚度、轴压比、钢纤维体积比和长细比对超高性能钢纤维混凝土薄壁钢管柱循环性能的影响。试验结果表明，高强混凝土填充薄壁钢管柱具有较差的循环性能。而用超高性能钢纤维混凝土代替高强混凝土填充薄壁钢管可以获得优异的循环性能。超高性能钢纤维混凝土薄壁钢管柱的循环性能也明显优于普通强度薄壁钢管混凝土柱。
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.