- 摘 要
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（1 西華大學(xué)土木建筑與環(huán)境學(xué)院， 成都 610039； 2 四川省公路規(guī)劃勘察設(shè)計研究院有限公司， 成都 610041）
［摘要］為探討鋼管鋼纖維高強混凝土短柱的軸壓力學(xué)性能，對8根鋼管鋼纖維高強混凝土短柱和4根鋼管高強混凝土短柱進行了軸壓試驗，主要考察了鋼纖維摻量、含鋼率、鋼材強度對其力學(xué)性能的影響。結(jié)果表明：含鋼率與鋼材強度較高時，摻鋼纖維對鋼管高強混凝土力學(xué)性能幾乎沒有影響；含鋼率與鋼材強度較低時，隨鋼纖維摻量增加，試件由剪切型破壞演變?yōu)檠男推茐?；試件表面局部破壞逐漸減弱，峰值點后承載力趨勢下降減緩，塑性變形能力與延性性能明顯提升；摻鋼纖維對鋼管鋼纖維高強混凝土承載力貢獻不明顯，其軸壓承載力可按普通鋼管混凝土軸壓承載力計算方法進行計算。
［關(guān)鍵詞］鋼管混凝土； 鋼纖維高強混凝土； 力學(xué)性能； 延性； 軸壓承載力
中圖分類號：TU398-9文獻標識碼：A文章編號：1002-848X(2020)05-0130-05
Experimental research on axial compressive mechanical behavior of steel fiber reinforced high strength concrete filled steel tube short columns
Zhou Xiaojun1, Mou Tingmin2, Song Guang1, Fan Bikun2
（1 School of Civil Engineering, Architecture and Environment, Xihua University, Chengdu 610039， China; 2 Sichuan Highway Planning， Survey， Design and Research Institute Ltd., Chengdu 610041， China）
Abstract:In order to investigate the axial compressive mechanical behavior of steel fiber reinforced high strength concrete filled steel tube (SFRHCFST) short column, 8 SFRHCFST short column specimens and 4 high strength concrete filled steel tube short column specimens were experimentally studied under axial compression load. The content of steel fiber, steel ratio and steel strength were all considered as experimental parameters. When the steel ratio and the teel strength are high, the addition of steel fiber has little effect on the mechanical behavior of SFRHCFST short columns; when the steel ratio and the steel strength are low, as the steel fiber content increases, the specimen evolves from shear failure to a waist-drum failure. The local damage on the surface of the specimen gradually weakened, the bearing capacity trend decreased after the peak point, and the plastic deformation ability and ductility performance were significantly improved. It has also been found that the addition of steel fibers has slight contribution to axial bearing capacity of SFRHCFST short columns, thus the axial bearing capacity calculation method of ordinary concrete filled steel tube is applied to SFRHCFST.
Keywords:concrete filled steel tube; steel fiber reinforced high strength concrete; mechanical behavior; ductility; axial bearing capacity
*四川省教育廳科技項目（15ZA0141），四川交通科技項目（2014C-7），西華大學(xué)自然科學(xué)基金（z1420603）。
作者簡介：周孝軍，博士，副教授，碩士生導(dǎo)師，Email：zhouxiaojun111@163.com。
