钢纤维混凝土轴压应力-应变全曲线的研究

Stress-strain curves of steel fibre concrete under axial compression

本文阐述了采用平行于棱柱体试件对称放置的4个强劲弹簧作刚性辅助架,在普通压力试验机上测定钢纤维混凝土轴压应力-应变全过程曲线的方法,分析了决定应力-应变全曲线形状的特征值及其与钢纤维含量特征参数v_fl/d的相关关系并提出了钢纤维混凝土轴压应力-应变全曲线的解析表达式。

A rigid auxiliary frame, consisting of four strong springs parallel to and symmetrically surrounding a prismatic sample, is installed in a conventional compression testing mechine in order to be able to measure the entire stress-strain curve of steel fibre concrete under axial compression. The relation between the characteristics of the stress-strain curve and the parameters of steel fibre contents is analysed. Some analytic expressions of stress-strain curves of steel fibre concrete under axial compression are presented.