鋼筋鋼纖維高強(qiáng)混凝土柱橫向承載靜力試驗研究*
劉申永1，劉中憲1，徐慎春2，金何偉1
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（1 天津城建大學(xué)天津市土木建筑結(jié)構(gòu)防護(hù)與加固重點(diǎn)實驗室，天津 300384； 2 天津大學(xué)建筑工程學(xué)院，天津 300072）
［摘要］通過6根鋼筋鋼纖維高強(qiáng)混凝土柱的橫向承載靜力試驗，研究了其承載力、剛度、延性及破壞形態(tài)，探討了鋼纖維種類、軸力對其抗彎剪性能、橫向荷載-跨中撓度曲線及延性的影響。試驗結(jié)果表明，鋼纖維的摻入顯著提高了鋼筋混凝土柱的橫向承載力及延性，且超細(xì)鋼纖維（MF）的提高效果優(yōu)于螺旋形鋼纖維（TF）。另外，所采用的軸力對鋼筋鋼纖維高強(qiáng)混凝土柱的橫向承載力、剛度及其延性也具有較大的增強(qiáng)作用。［關(guān)鍵詞］鋼纖維高強(qiáng)混凝土; 軸力; 承載力; 延性; 靜力試驗中圖分類號：TU398 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2016)04-0074-05
Experimental study on transverse static bearing capacity of steel fiber reinforced high strength concrete columnsLiu Shenyong1, Liu Zhongxian1, Xu Shenchun2, Jin Hewei1(1 Tianjin Key Laboratory of Civil Structure Protection and Reinforcement, Tianjin Chengjian University, Tianjin 300384, China; 2 School of Civil Engineering, Tianjin University, Tianjin 300072, China)Abstract:Transverse static bearing capacity experiments of 6 steel fiber reinforced high strength concrete columns were carried out to study bearing capacity, stiffness, ductility and failure mode and to discuss the effect of steel fiber type and axial force on the moment-shear resistance performance, transverse load-midspan deflection curve and the ductility. Experimental results show that mixing steel fiber greatly improves the transverse bearing capacity and ductility of steel reinforced concrete column. The improving effect for superfine fiber is better than that for spiral fiber. Moreover, the adopted axial force can also improve the transverse bearing capacity, stiffness and ductility of steel fiber reinforced high strength concrete columns.Keywords:steel fiber reinforced high strength concrete; axial force; bearing capacity; ductility; static experiment
*天津市科技支撐計劃項目（14ZCZDSF00016）,國家科技支撐計劃項目（2012BAJ07B05）。
通訊作者：劉中憲，博士，副教授，Email: zhongxian1212@163.com。
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