摘要
本文利用作者研制的混凝土三轴试验系统,对钢纤维混凝土试件在三向受压、两向受压一向受拉、两向受拉一向受压及三向受拉的应力状态下的强度进行了试验研究.除离散的试件外,可用于统计分析的试件数为184块,应力比22种.根据试验资料,、探讨了中间主应力和纤维体积含量对三向受力状态下钢纤维混凝士强度的影响;阐述了钢纤维混凝土在偏平面上破坏面的特性;给出了钢纤维混凝土三向应力状态下空间破坏准则的数学表达式.该表达式包含了三向受拉及两向受拉一向受压应力状态的影响.
The strength of steel fibre reinforced concrete under triaxial compression, triaxial tension and triaxial combined compression-tension has been studied experimentally with the concrete triaxial apparatus designed by the authors. Except the scattered specimens, the number of the specimens used for statistic analysis is 184, which includes 22 different kinds of stress ratios. Based on the test data,the influences of the intermediate principal stress and the volumetric content of the steel fibre in the concrete on the multiaxial strength are discussed, the characteristic of failure surface in the deviatoric plane is expounded, and the expression for the failure criterion of steel fibre reinforced concrete under triaxial stresses is proposed, which includes the influence of complex stress condition such as under triaxial tension, biaxial tension - uniaxial compression etc.
出处
《土木工程学报》
EI
CSCD
北大核心
1994年第3期14-23,共10页
China Civil Engineering Journal
基金
国家自然科学基金
建设部科学基金资助项目
