型钢钢纤维高强混凝土偏压柱试验研究  

Experimental study on steel and steel fiber reinforced high-strength concrete under eccentric compression

作　　者：李哲[1] 雷家奇 张香草 冯学伟 田建勃[1] Li Zhe;Lei Jiaqi;Zhang Xiangcao;Feng Xuewei;Tian Jianbo(School of Civil Engineering and Architectural,Xi’an University of Technology,710048,Xi’an,China)

机构地区：[1]西安理工大学土木建筑工程学院,西安710048

出　　处：《应用力学学报》2021年第4期1676-1683,共8页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金(51608441);陕西省自然科学基金(2017JQ5032)。

摘　　要：为了研究型钢钢纤维高强混凝土(SSFRHSC)柱的受力性能,设计了5个偏压和1个轴压SSFRHSC柱,研究了柱在不同偏心率和纤维体积率下的力学性能和破坏特征。试验结果表明:由于型钢和钢纤维的加入使SSFRHSC柱具有较强的变形能力;SSFRHSC柱的承载力和延性均与钢纤维体积率有关,钢纤维体积率从0%增加到0.5%和1.0%,SSFRHSC柱峰值承载力分别提高了9.47%和19.20%,其位移延性系数也分别增加了22.94%和34.41%;偏心距的改变对组合柱在偏心受压时的位移延性系数有明显影响,偏心距从40mm增加到80mm和120mm,试件的位移延性系数分别增加20.77%和42.25%。最后,建立了SSFRHSC柱承载力计算公式,计算结果接近试验值,可为该类组合柱结构设计提供一定参考。In order to study the mechanical properties of steel and steel fiber reinforced high-strength concrete(SSFRHSC)columns,five biased and one axially-compressed composite columns are designed.The mechanical properties and failure characteristics of SSFRHSC columns under different eccentricity and fiber volume ratios are studied.The test results show that the SSFRHSC column has a strong deformation capacity due to the addition of section steel and steel fibers.The eccentric compression bearing capacity of the SFSHRSC column is related to the steel fiber volume ratio,and the steel fiber volume ratio ranges from 0%to 1.0%per increasing 0.5%,the peak bearing capacity of the SFSHRSC column increased by 9.47%and 19.20%,respectively,and the displacement ductility coefficient increases by 22.94%and 34.41%,respectively.The changes of eccentricity have a significant effect on the displacement ductility coefficient of the composite column,the displacement ductility coefficient of the test piece increases by 22.94%and 34.41%,and for every 40 mm increase in eccentricity from 40 mm-120 mm,the displacement ductility coefficient of the test piece increases by 20.77%and 42.25%,respectively.Finally,a formula for calculating the bearing capacity of SFSHSSC columns is proposed,and the calculation results are close to the experimental values,which provides a certain reference for the structural design of such composite columns.

关 键 词：型钢钢纤维高强混凝土 偏心受压 钢纤维体积率 位移延性系数 

分 类 号：TU398.9[建筑科学—结构工程]